US20110038740A1 - Compressor - Google Patents
Compressor Download PDFInfo
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- US20110038740A1 US20110038740A1 US12/857,844 US85784410A US2011038740A1 US 20110038740 A1 US20110038740 A1 US 20110038740A1 US 85784410 A US85784410 A US 85784410A US 2011038740 A1 US2011038740 A1 US 2011038740A1
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- Prior art keywords
- cylinder
- connecting rod
- compressor
- rod driving
- diameter
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B27/0404—Details, component parts specially adapted for such pumps
- F04B27/0414—Cams
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
- F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B27/0404—Details, component parts specially adapted for such pumps
- F04B27/0423—Cylinders
Definitions
- the present application relates to the field of gas compressors.
- Oxygen has many important medical uses including, for example, assisting patients that have congestive heart failure or other diseases. Supplemental oxygen allows patients to receive more oxygen than is present in the ambient atmosphere.
- Systems and methods for delivering such oxygen typically include a compressor as a component.
- U.S. Pat. No. 5,988,165 discloses the use of an inline compressor for this purpose
- U.S. Pat. No. 6,923,180 discloses the use of a radial compressor for this purpose
- U.S. Patent Application Publication Pub. No. 2007/0065301 discloses an in-line compressor for this purpose.
- U.S. Pat. Nos. 5,988,165 and 6,923,180 and U.S. Patent Application Pub. No. 2007/0065301 are incorporated herein by reference in their entirety.
- a compressor for compressing gas comprises first, second, third and fourth cylinders.
- the central axis of the first cylinder is generally parallel with a central axis of the second cylinder and a central axis of the third cylinder is generally parallel with the central axis of the fourth cylinder.
- the axes of the first and second cylinders are oriented at an angle with respect to the axes of the third and fourth cylinders to form a V4 cylinder configuration.
- First, second third and fourth pistons are disposed in the first, second, third and fourth cylinders.
- a crankshaft has a main shaft and only two eccentric driving bodies that drive the first, second, third, and fourth pistons.
- a compressor in one exemplary embodiment, includes a crankshaft having a main shaft that includes a crank axis about which the crankshaft rotates.
- the crankshaft includes first and second circular driving bodies that extend radially outward from and are eccentric to the crank axis.
- the first circular connecting rod driving body abuts the second circular connecting rod driving body.
- Two drive or connecting rods are rotatably connected to each of the first and second circular connecting rod driving bodies, such that rotation of the first and second circular connecting rod bodies about the crank axis reciprocates the four drive or connecting rods.
- FIG. 1 is a perspective view of a compressor in accordance with an exemplary embodiment
- FIG. 1A is a second perspective view of the compressor shown in FIG. 1 , showing a crankshaft and drive rods of the compressor;
- FIG. 1B is a sectional view taken approximately along the plane indicated by lines 1 B- 1 B in FIG. 1 ;
- FIG. 2 is a sectioned perspective view taken along the plane indicated by lines 2 - 2 in FIG. 1 ;
- FIG. 2A is a sectional view taken along the plane indicated by lines 2 - 2 in FIG. 1 ,
- FIG. 3 is a sectioned perspective view taken along the plane indicated by lines 3 - 3 in FIG. 1 ;
- FIG. 3A is a sectional view taken along the plane indicated by lines 3 - 3 in FIG. 1 ;
- FIG. 4 is a perspective view of an assembly of a crankshaft, drive rods, and pistons;
- FIG. 5 is an exploded perspective view of the assembly shown in FIG. 4 ;
- FIG. 6A is a perspective view of a first embodiment of a crankshaft
- FIG. 6B is a sectioned perspective view taken along the plane indicated by lines 6 B- 6 B in FIG. 6A ;
- FIG. 6C is a view taken along lines 6 C- 6 C in FIG. 6A ;
- FIG. 6D is a view taken along lines 6 D- 6 D in FIG. 6C ;
- FIG. 7A is a perspective view of a second embodiment of a crankshaft
- FIG. 7B is a sectioned perspective view taken along the plane indicated by lines 7 B- 7 B in FIG. 7A ;
- FIG. 7C is a view taken along lines 7 C- 7 C in FIG. 7A ;
- FIG. 7D is a view taken along lines 7 D- 7 D in FIG. 7C ;
- FIG. 8A is a sectioned perspective view taken along lines 2 - 2 with parts removed to illustrate a cylinder and piston assembly
- FIG. 8B is the sectioned perspective view of FIG. 8A with components exploded to illustrate assembly of the piston in the cylinder;
- FIG. 9 is a sectional view of a first cylinder head assembly that forms part of the compressor of FIG. 1 ;
- FIG. 10 is a sectional view of a second cylinder head assembly that forms part of the compressor of FIG. 1 ;
- FIG. 11A is a perspective view of a flow path defining spacer
- FIG. 11B is a sectioned perspective view taken along lines 11 B- 11 B in FIG. 11A ;
- FIG. 12 is a schematic illustration of a first exemplary system of the present invention, including a compressor, for providing oxygen-enriched gas for use by a patient; and
- FIG. 13 is a schematic illustration of a second exemplary system of the present invention, including a compressor, for providing oxygen-enriched gas for use by a patient.
- interconnection may be direct as between the components or may be in direct such as through the use of one or more intermediary components.
- reference to a “member,” “component,” or “portion” shall not be limited to a single structural member, component, or element but can include an assembly of components, members or elements.
- FIG. 1 illustrates an exemplary embodiment of a compressor 10 .
- the compressor 10 includes a cylinder assembly 12 and first and second cylinder heads, 110 A, 110 B.
- the cylinder assembly 12 can take a wide variety of different forms.
- the cylinder assembly includes a base 13 , a first sleeve 14 A, a second sleeve 14 B, a third sleeve 14 C, and a fourth sleeve 14 D.
- the first sleeve 14 A includes a lower component 20 A and an upper component 30 A ( FIG. 2 )
- the second sleeve 14 B includes a lower component 20 B and an upper component 30 B ( FIG.
- the third sleeve 14 C includes a lower component 20 C and an upper component 30 C ( FIG. 3 )
- the fourth sleeve 14 D includes a lower component 20 D and an upper component 30 D ( FIG. 3 ).
- the sleeves may take a wide variety of different forms. Any configuration that provides the cylinders can be used. For example, one or more of the cylinders may be formed in only a single component.
- the first and/or second sleeves and/or the third and fourth sleeves, may be a formed from a single piece or block.
- the lower sleeve components 20 A, 20 B, 20 C, 20 D each have an opening 26 A- 26 D.
- the openings 26 A- 26 D may take a variety of different forms.
- One or more of the openings 26 A- 26 D may be configured to act as a guide. Further, one or more of the openings 26 A- 26 D may have the same size as one or more of the other openings 26 A- 26 D.
- the opening 26 A is adjacent and inline with the opening 26 B and the guide opening 26 C is adjacent and inline with the opening 26 D in the illustrated embodiment.
- an angle ⁇ between the guide openings 26 A, 26 B and the guide openings 26 C, 26 D is approximately 90 degrees in the exemplary embodiment.
- the angle ⁇ may be and angle in the range between 80 and 100 degrees in one exemplary embodiment, such as an angle between 85 and 95 degrees.
- the upper sleeve components 30 A- 30 D include openings or cylinders 36 A- 36 D.
- the cylinders 36 A- 36 D may take a variety of different forms.
- the cylinders 36 A- 36 D are inline with the openings 26 A- 26 D.
- the angle ⁇ is defined between the cylinders 36 A, 36 B and the cylinders 36 C, 36 D.
- the cylinders 36 A- 36 D are in a substantially “V4” configuration. That is, the central axes 37 A, 37 B of the cylinders 36 A, 36 B from a “V” shape with respect to the central axes 37 C, 37 D of the cylinders 36 C, 36 D (see FIG. 1B ).
- the central axes 37 A- 37 D are each axially offset from one another in the illustrated embodiment.
- the compressor includes a plurality of pistons 40 A- 40 D that are associated in a one to one relationship with the cylinders 36 A- 36 D.
- a first piston 40 A is located in the first cylinder 36 A and is supported for sliding (reciprocating) movement in the first cylinder ( FIG. 2 ).
- a second piston 40 B is located in the second cylinder 36 B and is supported for sliding (reciprocating) movement in the second cylinder ( FIG. 2 ).
- a third piston 40 C is located in the third cylinder 36 C and is supported for sliding (reciprocating) movement in the third cylinder ( FIG. 3 ).
- a fourth piston 40 D is located in the fourth cylinder 36 D and is supported for sliding (reciprocating) movement in the fourth cylinder ( FIG. 3 ).
- the cylinders 36 A- 36 D and corresponding pistons 40 A- 40 D are of varying diameters and as a result, the stroke of each piston 40 A- 40 D in its respective cylinder results in a different displacement of gas during the stroke of each piston.
- the concept of pistons 40 A- 40 D having different strokes from one another may optionally be implemented in the compressor 10 . If the strokes of the pistons are different from one another, one or more of the pistons may have the same diameter as one or more other pistons.
- the first cylinder 36 A is the largest in diameter
- the second cylinder 36 B is smaller than the first cylinder
- the third cylinder 36 C is smaller yet
- the fourth cylinder 36 D is the smallest.
- the compressor may have more than four cylinders or fewer than four cylinders.
- the compressor 10 may include one or more guides that are slideably disposed in the openings 26 A- 26 D.
- the compressor includes guides 42 B- 42 D slideably disposed in the openings 26 B- 26 D and a guide is not included in the first opening 26 A in the illustrated embodiment.
- guides may be included in all of the openings 26 A- 26 D or any number of guides may be included.
- the illustrated guides 42 B-D are driven by a crankshaft 50 and connecting rods 52 B- 52 D, as described below.
- the illustrated connecting rods 52 B- 52 D each include a first ring portion 53 B- 53 D and a second ring portion 55 B- 55 D for pivotal connection to the crankshaft 50 and the guides 42 B- 42 D respectively (See FIGS. 2 and 3 ).
- the first piston 40 A is fixed for movement with the drive or connecting rod 52 A.
- This arrangement is referred to as a “wobble piston,” because fixing the piston 40 A to the connecting rod 52 A causes some amount of canting or wobbling as the piston 40 A moves in the cylinder 36 A.
- the first piston 40 A could be pivotally connected to the connecting rod 52 A in a conventional manner. In this embodiment, the first piston 40 A will slide in the cylinder 36 A without significant canting or wobbling.
- the illustrated connecting or drive rod 52 A includes a ring portion 53 A for rotatable connection to a crankshaft 50 .
- the illustrated guide 42 B includes a first portion 43 B and a second portion 44 B.
- the first portion 43 B of the guide 42 B is located in the opening 26 B and is supported for sliding (reciprocating) movement in the opening.
- the second portion 44 B of the guide 42 B is located in the cylinder 36 B and is supported for sliding (reciprocating) movement in the cylinder 36 B.
- the second piston 40 B is separate from the guide 42 B and is not attached to the guide.
- the guide 42 B forces the second piston 40 B toward the end surface 32 B or head end of the cylinder 36 B.
- the illustrated guide 42 C includes a first portion 43 C and a second portion 44 C.
- the first portion 43 C of the guide 42 C is located in the opening 26 C and is supported for sliding (reciprocating) movement in the opening.
- the second portion 44 C of the guide 42 C is located in the cylinder 36 C and is supported for sliding (reciprocating) movement in the cylinder 36 C.
- the third piston 40 C is separate from the guide 42 C and is not attached to the guide.
- the guide 42 C forces the third piston 40 C toward the end surface 32 C or head end of the cylinder 36 C.
- gas pressure applied to the cylinder 36 C by the second piston 40 B forces the third piston 40 C toward the end surface 34 C or crankshaft end of the cylinder.
- the third piston 40 C remains in contact with the second portion 44 C of the guide 42 C during both the entire compression stroke and the entire charging stroke.
- the third piston 40 C is fixed or connected for movement with the guide 42 C.
- the illustrated guide 42 D includes a first portion 43 D and a second portion 44 D.
- the first portion 43 D of the guide 42 D is located in the opening 26 D and is supported for sliding (reciprocating) movement in the opening.
- the second portion 44 D of the guide 42 D is located in the cylinder 36 D and is supported for sliding (reciprocating) movement in the cylinder 36 D.
- the fourth piston 40 D is separate from the guide 42 D and is not attached to the guide.
- the guide 42 D forces the fourth piston 40 D toward the end surface 32 D or head end of the cylinder 36 C.
- gas pressure applied to the cylinder 36 D by the third piston 40 C forces the fourth piston 40 D toward the end surface 34 D or crankshaft end of the cylinder.
- the fourth piston 40 D remains in contact with the second portion 44 D of the guide 42 D during both the entire compression stroke and the entire charging stroke.
- the fourth piston 40 D is fixed or connected for movement with the guide 42 D.
- crankshaft 50 (described below in detail) is supported for rotation about a crank axis X in first and second bearings 62 , 68 .
- the first and second bearings 62 , 68 are mounted to the base 13 by first and second and second bearing supports 54 and 56 that are located at either end of the compressor base 13 .
- the crankshaft 50 fauns part of a drive mechanism 79 of the compressor 10 for driving the pistons 40 A- 40 D for movement in the cylinders 36 A- 36 D.
- the drive mechanism 79 includes the crankshaft 50 , the drive or connecting rods 52 A- 52 D, and the guides 42 B- 42 D.
- the crankshaft could be connected to the pistons or coupled to the pistons 40 A- 40 D in other manners, for example with connecting or drive rods but not guides.
- FIGS. 6A-6D and 7 A- 7 D illustrate two embodiments of crankshafts 50 .
- the crankshaft 50 is made from a single piece (or welded together to form a single piece).
- the crankshaft 50 may be made from multiple pieces that are assembled together and can be disassembled.
- the crankshaft 50 includes a main shaft 70 having a generally cylindrical configuration defined by a cylindrical outer surface centered on a crank axis X of the compressor 10 .
- the crankshaft 50 rotates about the crank axis X during operation of the compressor 10 .
- the main shaft 70 has externally threaded opposite end portions 78 and 80 . Referring to FIGS. 1-3 , the main shaft 70 is received and supported in the first and second bearings 62 and 68 .
- the crankshaft 50 also includes first and second circular connecting rod driving bodies 84 A, 84 B that extend radially outward from and are eccentric to the crank axis X.
- the bodies 84 A, 84 B are identical to each other, for ease of manufacturing. However, the bodies 84 A. 84 B may have different sizes, for example such that the body 84 A provides a different stroke than body 84 B.
- each of the eccentric bodies 84 A, 84 B has a cylindrical configuration with each cylinder having a central axis 85 A, 85 B that is parallel to, but spaced apart from the crank axis X.
- the central axis 85 A and the central axis 85 B are positioned away from the crank axis X by the same distance dl and an angle ⁇ of approximately 180 degrees (See FIG. 6D ) is formed between the central axis 85 A, the crank axis X, and the central axis 85 B.
- the bodies 84 A, 84 B can be positioned with respect to the crank axis in any manner to achieve desired motions of crank or drive rods 54 A- 54 D that are coupled to the bodies.
- the main shaft portion 70 that is mounted in the bearings 62 , 68 has a diameter that is less than a diameter of the circular connecting rod driving bodies 84 A, 84 B.
- first and second circular connecting rod driving bodies 84 A, 84 B are the only connecting rod driving bodies of the crankshaft.
- each of the connecting rod driving bodies drives two connecting or drive rods 54 A- 54 D as will be described in more detail below.
- any number of connecting rod driving bodies can be included.
- one connecting rod driving body may be included for each connecting or drive rod.
- one or more connecting rod driving bodies may drive one connecting or drive rod and one or more connecting rod driving bodies may drive two or more connecting or drive rods.
- the connecting rod drive bodies 84 A, 84 B may take a wide variety of different forms.
- the connecting rod driving bodies 84 A, 84 B are each formed as a single continuous cylinder.
- the illustrated continuous cylinders are integrally formed with the main shaft 70 .
- the connecting rod driving bodies are two separately formed continuous cylindrical members that are assembled with the main shaft 70 .
- the two separately formed continuous cylindrical members may be identical or may have different sizes to provide different strokes.
- the first connecting rod driving body 84 A is connected to the second connecting rod driving body 84 D by a circular disk 86 disposed between the first connecting rod driving body 84 A and the second connecting rod driving body 84 B.
- the connecting rod driving bodies 84 A, 84 B may be separate from one another and then fixed to the circular disk 86 or the connecting rod driving body 84 A, the circular disk 86 , and the connecting rod driving body 84 A may be integrally formed.
- the circular disk 86 is centered on the crank axis X. Referring to FIG. 7D , the illustrated circular disk has an outer circumference 87 that is radially outward of the outer circumferences of both of the first and second connecting rod driving bodies 84 A, 84 B.
- a connecting rod 52 A is connected between the first piston 40 A and the first eccentric connecting rod driving body 84 A and a connecting rod 52 B is connected between the guide 42 B (which drives the second piston 40 B) and the second eccentric connecting rod driving body 84 B.
- the ring 53 A is disposed around the body 84 A to rotatably connect the rod 52 A to the body 84 A.
- a bearing may be disposed between the ring 53 A and the body 84 A.
- the ring 53 B is disposed around the body 84 B to rotatably connect the rod 52 B to the body 84 B.
- a bearing may be disposed between the ring 53 B and the body 84 B.
- a pin 90 B extends through the ring portion 55 B to pivotally connect the guide 42 B the rod 52 B.
- a connecting rod 52 C is connected between the guide 42 C (which drives the third piston 40 C) and the first eccentric connecting rod driving body 84 A and a connecting rod 52 D is connected between the guide 42 D (which drives the fourth piston 40 D) and the second eccentric connecting rod driving body 84 B.
- the ring 53 C is disposed around the body 84 A to rotatably connect the rod 52 C to the body 84 A.
- a bearing may be disposed between the ring 53 C and the body 84 A.
- a pin 90 C extends through the ring portion 55 C to pivotally connect the guide 42 C to the rod 52 C.
- the ring 53 D is disposed around the body 84 B to rotatably connect the rod 52 D to the body 84 B.
- a bearing may be disposed between the ring 53 D and the body 84 B.
- a pin 90 D extends through the ring 55 D to pivotally connect the guide 42 D to the rod 52 D.
- the first eccentric connecting rod driving body 84 A drives both the first and third pistons 40 A, 40 C.
- the motion of the third piston 40 C follows or lags the motion of the first piston 40 A by rotation of the crankshaft by the angle of the “V” ⁇ (approximately 90 degrees in the illustrated embodiment).
- the second eccentric connecting rod driving body 84 B drives both the second and fourth pistons 40 B, 40 D.
- the motion of the second piston 40 B follows or lags the motion of the first piston 40 A by rotation of the crankshaft by the angle of the angular spacing ⁇ (approximately 180 degrees in the illustrated embodiment).
- the motion of the fourth piston 40 D follows or lags the motion of the second piston 40 B by rotation of the crankshaft by the angle of the “V” ⁇ (approximately 90 degrees in the illustrated embodiment).
- a drive pulley (not shown) may be located on one of the end portions 78 of the main shaft 70 to facilitate the application of a drive torque to the main shaft 70 , to reciprocate the pistons 40 A- 40 D.
- the compressor 10 includes a cylinder head assembly 100 .
- the cylinder head assembly 100 includes a first cylinder head 110 A and a second cylinder head 110 B that is fastened to the cylinder assembly 12 with a plurality of fasteners.
- the compressor 10 includes fasteners, such as bolts 102 that extend through holes in the cylinder heads 110 A, 110 B and are threaded into the base 13 . When the bolts 102 are tightened down, the cylinder head 110 A is clamped to the first and second sleeves 14 A, 14 B and the cylinder head 110 B is clamped to the third and fourth sleeves 14 C, 14 D.
- each of the separate pistons 40 B- 40 D can be removed from the cylinders 36 B- 36 D by removing the fasteners 102 (See FIG. 1 ) that hold the head 110 A and/or 110 B down.
- the second cylinder 36 B and piston 40 B is illustrated in FIGS. 8A and 8B , but the other pistons and cylinders can be repaired or serviced in the same manner.
- the head 110 A, the cylinder 36 B, and the piston 40 B can be removed and separated as illustrated by FIG. 8B .
- This arrangement allows the piston 40 B and/or cylinder 36 B to be replaced or serviced without requiring the drive or connecting rod 52 B to be removed from the crankshaft 50 .
- each cylinder head 110 A, 110 E is formed as one piece from metal.
- each cylinder head 110 A, 110 B has a rectangular configuration including a lower side surface 112 .
- a component chamber 114 extends the length of each cylinder head 110 A, 110 B.
- the component chambers 114 each have a cylindrical configuration centered on an axis 116 .
- Each component chamber 114 has an inlet end portion 118 and an outlet end portion 120 .
- the inlet end portion 118 of the first cylinder head 110 A forms an inlet of the compressor 10 .
- the outlet end portion 120 forms an outlet of the first cylinder head 110 A.
- the inlet end portion 118 of the second cylinder head 110 B fowls an inlet to the second head 110 B.
- a conduit 119 connects the outlet of the first head 110 A to the inlet of the second head 110 B.
- the threaded outlet end portion 120 of the second head 110 b forms an outlet of the compressor 10 .
- the cylinder heads 110 a, 110 b have a plurality of charging ports 122 A- 122 D that extend between the component chamber 114 and the lower side surface 112 .
- the number of charging ports 122 A- 122 D is equal to the number of cylinders 36 A- 36 D in the compressor 10 in the illustrated embodiment.
- the charging ports 122 A- 122 D establish fluid communication between the cylinders 36 A- 36 D and the component chamber 114 .
- a single charging port 122 is associated with each one of the cylinders 36 .
- the first cylinder 36 A has a first charging port 122 A
- the second cylinder 36 B has a second charging port 122 B
- the third cylinder 36 C has a third charging port 122 C
- the fourth cylinder 36 D has a fourth charging port 122 D.
- a plurality of components are located in the component chamber 114 of the cylinder heads 110 A, 110 B.
- the components direct fluid flow between the inlet 118 of the first head 110 A, the cylinders 36 A- 36 D and the outlet 120 of the second head 110 B.
- the components include a plurality of check valves 130 A- 130 F for controlling flow of air into and out of the various cylinders 36 A- 36 D, and a plurality of components or structures for positioning the check valves in the chamber 114 and inhibiting gas flow around the check valves (i.e. leakage around the check valves).
- the components for positioning the check valves are spacers and are configured to direct air to flow between the check valves.
- the check valves may also be spaced apart in a variety of ways, other than using spacers.
- one or more of the check valves may thread into the component chamber 114 , the component chamber may include a stop surface, etc. Any manner of positioning the check valves may be used.
- arrangements for setting the position of the check valves with respect to the inlets 118 and outlets 120 of the cylinder heads 110 A, 110 B are not shown.
- spacers or another positioning arrangement would be used to position the illustrated check valves and spacers as shown.
- U.S. Patent Application Publication, Pub. No. 2007/0065301 shows that inlet and outlet connectors 180 , 196 may engage spacers that fix the position of the valves.
- the components located in the component chamber may also include a plurality of seals that prevent leakage around the check valves.
- each illustrated check valve 130 A- 130 F includes a valve body 132 having a generally cylindrical configuration with a central chamber 134 .
- An end wall 136 is located at the upstream end of the valve body 132 .
- the end wall 136 has a central opening 138 .
- the downstream end of the valve body 132 is open.
- the check valve 130 A- 130 F each include a movable valve element in the form of a ball 146 .
- the dimensions of the ball 146 are selected so that when the ball is in engagement with the end wall 136 of the valve body 132 , the ball closes the opening 138 . When the ball 146 is away from the end wall 136 , fluid flow is enabled through the check valve. A spring biases the ball into engagement with the end wall 136 to close the valve. Further details of acceptable check valves are described in U.S. Patent Application Publication No. 2007/0065301.
- Spacers 150 A- 150 D are positioned in the chamber 114 and space the check valves 130 A- 130 F apart.
- FIGS. 11A and 11B illustrate the spacers 150 B- 150 D.
- the spacers 150 B- 150 D are preferably identical to each other.
- Each spacer 150 B- 150 D is a cylindrical block of metal that has an outside diameter substantially equal in size to the inside diameter of the component chamber 114 in the cylinder heads 110 A, 110 B.
- the spacers 150 B- 150 D has an upstream end portion 152 and a downstream end portion 154 .
- the end portions 152 , 154 are identical, since the spacer is symmetrical about a midplane 153 .
- the spacer 150 has a small diameter central opening 155 that extends for the length of the spacer between the upstream end portion 152 and the downstream end portion 154 .
- the symmetric end portions 152 , 154 both include passages 158 that extend radially outward from the central opening 155 and an external groove 160 in fluid communication with the passage 158 .
- fluid communication is established between the central opening 155 of the spacer 150 , and the external groove 160 .
- the spacer 150 A is shorter than the spacers 150 B- 150 D.
- the spacer 150 A is a cylindrical block of metal that has an outside diameter substantially equal in size to the inside diameter of the component chamber 114 in the cylinder head 110 .
- the spacer 150 A has symmetrical upstream and downstream end portions 164 , 166 .
- a small diameter central opening 170 extends for the length of the short spacer between the upstream end portion 164 and the downstream end portion 166 .
- the spacer 150 A also has an internal passage 172 that extends radially outward from the central passage 170 and terminates in a groove 174 on the outer surface of the spacer 150 A. As a result, fluid communication is established between the upstream and downstream end portions 164 and 166 of the spacer 150 A, and the external groove 174 .
- an inlet connector 180 is secured in the upstream end of each of the cylinder heads 110 A, 110 B.
- the inlet connector has a fluid inlet passage 182 that communicates with the component chamber.
- An outlet connector 196 is secured in the downstream end of each of the cylinder heads 110 A, 110 B.
- the outlet connector 196 has a fluid outlet passage 198 that communicates with the component chamber 114 .
- the components are positioned in the component chamber 114 in the cylinder heads 110 A, 110 B.
- An inlet check valve 130 E is positioned in the component chamber 114 in the first cylinder head 110 A.
- the inlet opening 138 of the inlet check valve 130 E is in communication with the inlet 118 of compressor 10 .
- a seal may be provided between the check valve and the component chamber 114 .
- the spacer 150 A is positioned in the component chamber 114 in the cylinder head 110 such that an upstream end of the spacer 154 A engages the downstream end of the inlet check valve 130 E.
- the external groove 174 on the spacer 162 aligns with the first charging port 122 A in the cylinder head 110 A. As a result, fluid communication can be established between the component chamber 114 and the first cylinder 36 A. (See FIG. 2A ).
- a second check valve, or first cylinder check valve, 130 A is positioned in the component chamber 114 in the cylinder head 110 A.
- the upstream end of the second check valve 130 A engages the downstream end of the spacer 150 A.
- the inlet opening 138 of the second check valve 130 A aligns with the central passage 170 in the spacer 150 B.
- An optional seal is provided between the spacer 150 A and the second check valve 130 A.
- a spacer 150 B is positioned in the component chamber 114 in the cylinder head 110 A.
- the upstream end of the spacer 150 B engages the downstream end of the check valve 130 A.
- the central opening 155 of the spacer 150 B aligns with the outlet of the check valve 130 A.
- the external groove 160 at the downstream end of the second spacer 150 B aligns with the second charging port 122 B in the cylinder head 110 A.
- a third check valve, or second cylinder check valve, 130 B is positioned in the component chamber 114 in the cylinder head 110 A.
- the upstream end of the check valve 130 B engages the downstream end of the spacer 150 B.
- the opening 138 of the check valve 130 B aligns with the central passage 155 in the spacer 150 B.
- An optional seal is formed between the spacer 150 B and the check valve 130 B.
- an optional fourth check valve, or second head inlet check valve 130 C is positioned in the component chamber 114 in the second cylinder head 110 B.
- the inlet opening 138 of the inlet check valve 130 C is in communication with the inlet 118 of second head 110 B.
- a seal may be provided between the check valve and the component chamber 114 .
- a spacer 150 C is positioned in the component chamber 114 in the cylinder head 110 B.
- the upstream end of the spacer 150 C engages the downstream end of the check valve 130 C.
- the central opening 155 of the spacer 150 C aligns with the central opening of the check valve 130 C.
- the external groove 160 of the spacer 150 C aligns with the charging port 122 C in the cylinder head 110 B. As a result, fluid communication can be established between the component chamber 114 and the third cylinder 36 C (See FIG. 3A ).
- a fifth check valve, or third cylinder check valve, 130 D is positioned in the component chamber 114 in the cylinder head 110 B.
- the upstream end of the check valve 130 D engages the downstream end of the spacer 150 C.
- the opening 138 of the check valve 130 D aligns with the passage 155 in the spacer 150 C.
- a seal may be provided between spacer 150 C and the check valve 130 D.
- a spacer 150 D is positioned in the component chamber 114 in the cylinder head 110 B.
- the upstream end of the spacer 150 D engages the downstream end of the third cylinder check valve 130 D.
- the central opening 156 of the spacer 150 D aligns with the central chamber of the check valve 130 D.
- the external groove 160 at the downstream end of the fourth spacer 150 D aligns with the fourth charging port 122 D in the cylinder head 110 .
- a sixth check valve, or fourth cylinder check valve 130 F is positioned in the component chamber 114 in the cylinder head 110 B.
- the upstream end of the fourth cylinder check valve 130 F engages the downstream end of the spacer 150 D.
- the opening 138 of the check valve aligns with the central passage 155 in the spacer 150 D.
- An optional seal is provided between the spacer 150 D and the check valve 130 D.
- An outlet connector 196 is fixed to the downstream end of the cylinder head 110 B.
- the outlet connector 196 has a fluid outlet passage 198 that is in fluid communication with the component chamber 114 of the cylinder head 110 B.
- all the check valves 130 A-F of the compressor 10 are located in the cylinder heads 110 A, 110 B.
- the gas flows from the central passage 170 (See FIG. 9 ) of the spacer 150 A, radially outward through the passage 172 , into the external groove 174 on the spacer.
- the air then flows through the first charging port 122 A and into the first cylinder 36 A (See FIG. 2A ).
- the gas flowing through the inlet check valve 130 E does not flow through the second check valve 130 A, even though the spacer 150 A is open for free flow to the second check valve. This is because the pressure downstream of the second check valve 130 A, i.e., the pressure in the second cylinder 36 B, is higher than the intake pressure. Therefore, the second check valve 130 A stays closed and the intake air flows into the first cylinder 36 A.
- the second check valve 130 A is forced open to allow air to flow out of the first cylinder 36 A into the second spacer 150 B.
- the air flows through the second spacer 150 B to the radially extending passages 158 (See FIGS. 11A and 11B ) and the external groove 160 in the downstream end 154 of the second spacer 150 B.
- the air then flows from the groove 160 into the second charging port 122 B.
- the timing of the first and second cylinders 36 A and 36 B is selected so that when the first cylinder 36 A is on its exhaust phase, the second cylinder 36 B is on its intake phase. This is achieved by the 180 degree offset ⁇ between the first and second eccentric bodies 84 A, 84 B.
- the air that is compressed in the first cylinder 36 A and forced into the second spacer 150 B is able to flow into the second cylinder 36 B, to be further compressed, because the second cylinder is smaller in diameter than the first cylinder but has the same stroke in the illustrated exemplary embodiment.
- the air flowing through the second spacer 150 B does not flow through the third check valve 130 B, even through the second spacer is open to the third check valve. This is because the pressure downstream of the third check valve 130 B, (i.e., the pressure in the third cylinder 36 C), is higher than the pressure at the third check valve. Therefore, the third check valve 130 B stays closed and the air flows into the second cylinder 36 B.
- the air that is compressed in the second cylinder 36 B flows through the conduit 119 into the third cylinder 36 C, there to be further compressed.
- the air that is compressed in the third cylinder 36 C flows into the fourth cylinder 36 D, there to be further compressed.
- the air that is compressed in the fourth cylinder 36 D flows out of the compressor 10 through the outlet connector 194 .
- a system 210 includes a concentrator 212 that is operable to provide oxygen-enriched gas, for example, from an ambient air input.
- the oxygen-enriched gas is fed to a product tank 214 .
- a regulator 216 emits oxygen-enriched gas from the product tank 214 into a flow line 218 and feeds the same to a flow meter 220 which subsequently emits the oxygen-enriched gas to the patient at a predetermined flow rate, for example a flow rate of from 0.1 to 6 liters per minute.
- the flow meter 220 can be closed so that all the oxygen-enriched gas is directed to the compressor 10 .
- the compressor may take a wide variety of fauns and may include any combination or subcombination of the features of the compressors described with respect to FIGS. 1-11 . Further, any combination or subcombination of the features of the compressors described with respect to FIGS. 1-11 can be used in a wide variety of different applications, including but not limited to the systems illustrated by FIGS. 12 and 13 .
- Gas not directed to the patient is carried via line 222 to two-way valve 224 .
- a very small portion of the gas in the flow line 220 is directed through line 226 and restrictor 228 into an oxygen sensor 230 which detects whether or not the concentration of the oxygen is of a predetermined value, for example, at least 84 percent as directed to the patient and at least 93 ⁇ 3% as directed to the compressor.
- the two-way valve 224 When the oxygen sensor 230 detects a concentration at or above the predetermined level, the two-way valve 224 is kept open to permit the oxygen-enriched gas to flow through the valve 224 and line 232 into a buffer tank 234 wherein the pressure is essentially the same as the pressure in the product tank 214 . However, should the oxygen sensor 230 not detect a suitable oxygen concentration, two-way valve 224 is closed so that the oxygen concentrator 212 can build up a sufficient oxygen concentration. This arrangement prioritizes the flow of oxygen-enriched gas so that the patient is assured of receiving a gas having a sufficient oxygen concentration therein.
- Buffer tank 234 can have a regulator 236 thereon generally set at 12 psi to admit the oxygen-enriched gas to the compressor 10 when needed.
- the output of the compressor 10 is used to fill a cylinder or portable tank 238 for ambulatory use by the patient.
- the pressure regulator 236 can be set at anywhere from about 13 to about 21 psi.
- a restrictor 240 controls the flow rate of gas from the buffer tank 234 to the compressor 10 . Should the operation of the compressor 10 cause the pressure in the buffer tank 234 to drop below a predetermined value, a pressure sensor (not shown) automatically cuts off the flow of gas at a pressure above the pressure of the gas being fed to the patient. This prioritization assures that the patient receives priority with regard to oxygen-enriched gas.
- FIG. 13 shows a system 210 a that is somewhat different from the system 210 of FIG. 12 .
- the compressor 10 includes its own oxygen sensor and control circuitry, so that the elements 224 - 232 are not present as they are in the system shown in FIG. 12 .
- the regulator 236 is not present on the buffer tank.
- a flow restrictor may be provided between the concentrator and the buffer tank. (It should be noted that the buffer tank 234 is optional in all systems, and that the compressor could be fed directly from the product tank).
Abstract
Description
- The present application is based on and claims priority to Application Ser. No. 61/234,330 filed Aug. 17, 2010, the disclosure of which is incorporated herein by reference.
- The present application relates to the field of gas compressors.
- Oxygen has many important medical uses including, for example, assisting patients that have congestive heart failure or other diseases. Supplemental oxygen allows patients to receive more oxygen than is present in the ambient atmosphere. Systems and methods for delivering such oxygen typically include a compressor as a component. U.S. Pat. No. 5,988,165, for example, discloses the use of an inline compressor for this purpose, U.S. Pat. No. 6,923,180 discloses the use of a radial compressor for this purpose, and U.S. Patent Application Publication Pub. No. 2007/0065301 discloses an in-line compressor for this purpose. U.S. Pat. Nos. 5,988,165 and 6,923,180 and U.S. Patent Application Pub. No. 2007/0065301 are incorporated herein by reference in their entirety.
- The present application discloses embodiments of a gas compressor. For example, compressors that are suitable for compressing oxygen. In one exemplary embodiment, a compressor for compressing gas comprises first, second, third and fourth cylinders. The central axis of the first cylinder is generally parallel with a central axis of the second cylinder and a central axis of the third cylinder is generally parallel with the central axis of the fourth cylinder. The axes of the first and second cylinders are oriented at an angle with respect to the axes of the third and fourth cylinders to form a V4 cylinder configuration. First, second third and fourth pistons are disposed in the first, second, third and fourth cylinders. A crankshaft has a main shaft and only two eccentric driving bodies that drive the first, second, third, and fourth pistons.
- In one exemplary embodiment, a compressor includes a crankshaft having a main shaft that includes a crank axis about which the crankshaft rotates. The crankshaft includes first and second circular driving bodies that extend radially outward from and are eccentric to the crank axis. The first circular connecting rod driving body abuts the second circular connecting rod driving body. Two drive or connecting rods are rotatably connected to each of the first and second circular connecting rod driving bodies, such that rotation of the first and second circular connecting rod bodies about the crank axis reciprocates the four drive or connecting rods.
- Further features and advantages of the present invention will become apparent to those of ordinary skill in the art to which the invention pertains from a reading of the following description together with the accompanying drawings, in which:
-
FIG. 1 is a perspective view of a compressor in accordance with an exemplary embodiment; -
FIG. 1A is a second perspective view of the compressor shown inFIG. 1 , showing a crankshaft and drive rods of the compressor; -
FIG. 1B is a sectional view taken approximately along the plane indicated bylines 1B-1B inFIG. 1 ; -
FIG. 2 is a sectioned perspective view taken along the plane indicated by lines 2-2 inFIG. 1 ; -
FIG. 2A is a sectional view taken along the plane indicated by lines 2-2 inFIG. 1 , -
FIG. 3 is a sectioned perspective view taken along the plane indicated by lines 3-3 inFIG. 1 ; -
FIG. 3A is a sectional view taken along the plane indicated by lines 3-3 inFIG. 1 ; -
FIG. 4 is a perspective view of an assembly of a crankshaft, drive rods, and pistons; -
FIG. 5 is an exploded perspective view of the assembly shown inFIG. 4 ; -
FIG. 6A is a perspective view of a first embodiment of a crankshaft; -
FIG. 6B is a sectioned perspective view taken along the plane indicated bylines 6B-6B inFIG. 6A ; -
FIG. 6C is a view taken alonglines 6C-6C inFIG. 6A ; -
FIG. 6D is a view taken alonglines 6D-6D inFIG. 6C ; -
FIG. 7A is a perspective view of a second embodiment of a crankshaft; -
FIG. 7B is a sectioned perspective view taken along the plane indicated bylines 7B-7B inFIG. 7A ; -
FIG. 7C is a view taken alonglines 7C-7C inFIG. 7A ; -
FIG. 7D is a view taken alonglines 7D-7D inFIG. 7C ; -
FIG. 8A is a sectioned perspective view taken along lines 2-2 with parts removed to illustrate a cylinder and piston assembly; -
FIG. 8B is the sectioned perspective view ofFIG. 8A with components exploded to illustrate assembly of the piston in the cylinder; -
FIG. 9 is a sectional view of a first cylinder head assembly that forms part of the compressor ofFIG. 1 ; -
FIG. 10 is a sectional view of a second cylinder head assembly that forms part of the compressor ofFIG. 1 ; -
FIG. 11A is a perspective view of a flow path defining spacer; -
FIG. 11B is a sectioned perspective view taken alonglines 11B-11B inFIG. 11A ; -
FIG. 12 is a schematic illustration of a first exemplary system of the present invention, including a compressor, for providing oxygen-enriched gas for use by a patient; and -
FIG. 13 is a schematic illustration of a second exemplary system of the present invention, including a compressor, for providing oxygen-enriched gas for use by a patient. - As described herein, when one or more components are described as being connected, joined, affixed, coupled, attached, or otherwise interconnected, such interconnection may be direct as between the components or may be in direct such as through the use of one or more intermediary components. Also as described herein, reference to a “member,” “component,” or “portion” shall not be limited to a single structural member, component, or element but can include an assembly of components, members or elements.
-
FIG. 1 illustrates an exemplary embodiment of acompressor 10. Thecompressor 10 includes acylinder assembly 12 and first and second cylinder heads, 110A, 110B. Thecylinder assembly 12 can take a wide variety of different forms. In the example illustrated byFIG. 1 , the cylinder assembly includes abase 13, afirst sleeve 14A, asecond sleeve 14B, athird sleeve 14C, and afourth sleeve 14D. Referring toFIGS. 2 and 3 , in an exemplary embodiment, thefirst sleeve 14A includes alower component 20A and anupper component 30A (FIG. 2 ), thesecond sleeve 14B includes alower component 20B and anupper component 30B (FIG. 2 ), thethird sleeve 14C includes alower component 20C and anupper component 30C (FIG. 3 ), and thefourth sleeve 14D includes alower component 20D and anupper component 30D (FIG. 3 ). The sleeves may take a wide variety of different forms. Any configuration that provides the cylinders can be used. For example, one or more of the cylinders may be formed in only a single component. The first and/or second sleeves and/or the third and fourth sleeves, may be a formed from a single piece or block. - Referring to
FIGS. 2 and 3 , thelower sleeve components opening 26A-26D. Theopenings 26A-26D may take a variety of different forms. One or more of theopenings 26A-26D may be configured to act as a guide. Further, one or more of theopenings 26A-26D may have the same size as one or more of theother openings 26A-26D. Theopening 26A is adjacent and inline with theopening 26B and theguide opening 26C is adjacent and inline with theopening 26D in the illustrated embodiment. Referring to 1B, an angle θ between theguide openings guide openings - Referring to
FIGS. 2 and 3 , theupper sleeve components 30A-30D include openings orcylinders 36A-36D. Thecylinders 36A-36D may take a variety of different forms. Thecylinders 36A-36D are inline with theopenings 26A-26D. As such, the angle θ is defined between thecylinders cylinders cylinders 36A-36D are in a substantially “V4” configuration. That is, thecentral axes cylinders central axes cylinders FIG. 1B ). As can be seen inFIGS. 1 , 2, and 3, thecentral axes 37A-37D are each axially offset from one another in the illustrated embodiment. - Referring to
FIGS. 2 and 3 , the compressor includes a plurality ofpistons 40A-40D that are associated in a one to one relationship with thecylinders 36A-36D. Afirst piston 40A is located in thefirst cylinder 36A and is supported for sliding (reciprocating) movement in the first cylinder (FIG. 2 ). Asecond piston 40B is located in thesecond cylinder 36B and is supported for sliding (reciprocating) movement in the second cylinder (FIG. 2 ). Athird piston 40C is located in thethird cylinder 36C and is supported for sliding (reciprocating) movement in the third cylinder (FIG. 3 ). Afourth piston 40D is located in thefourth cylinder 36D and is supported for sliding (reciprocating) movement in the fourth cylinder (FIG. 3 ). - The
cylinders 36A-36D andcorresponding pistons 40A-40D are of varying diameters and as a result, the stroke of eachpiston 40A-40D in its respective cylinder results in a different displacement of gas during the stroke of each piston. The concept ofpistons 40A-40D having different strokes from one another may optionally be implemented in thecompressor 10. If the strokes of the pistons are different from one another, one or more of the pistons may have the same diameter as one or more other pistons. In the illustrated embodiment, thefirst cylinder 36A is the largest in diameter, thesecond cylinder 36B is smaller than the first cylinder, thethird cylinder 36C is smaller yet, and thefourth cylinder 36D is the smallest. In other embodiments, the compressor may have more than four cylinders or fewer than four cylinders. - As indicated above, the
upper sleeves 30A-30D are in engagement withlower sleeves 20A-20D. Theopenings 26A-26D in the lower guide sleeves align with thecylinders 36A-36D in the upper cylinder sleeves. Thecompressor 10 may include one or more guides that are slideably disposed in theopenings 26A-26D. Referring toFIGS. 2-4 , the compressor includesguides 42B-42D slideably disposed in theopenings 26B-26D and a guide is not included in thefirst opening 26A in the illustrated embodiment. However, guides may be included in all of theopenings 26A-26D or any number of guides may be included. The illustrated guides 42B-D are driven by acrankshaft 50 and connectingrods 52B-52D, as described below. The illustrated connectingrods 52B-52D each include afirst ring portion 53B-53D and asecond ring portion 55B-55D for pivotal connection to thecrankshaft 50 and theguides 42B-42D respectively (SeeFIGS. 2 and 3 ). - In the illustrated embodiment, no guide is disposed in the
opening 26A. Thefirst piston 40A is fixed for movement with the drive or connectingrod 52A. This arrangement is referred to as a “wobble piston,” because fixing thepiston 40A to the connectingrod 52A causes some amount of canting or wobbling as thepiston 40A moves in thecylinder 36A. Alternatively, thefirst piston 40A could be pivotally connected to the connectingrod 52A in a conventional manner. In this embodiment, thefirst piston 40A will slide in thecylinder 36A without significant canting or wobbling. The illustrated connecting or driverod 52A includes aring portion 53A for rotatable connection to acrankshaft 50. - Referring to
FIG. 2A , the illustratedguide 42B includes afirst portion 43B and asecond portion 44B. Thefirst portion 43B of theguide 42B is located in theopening 26B and is supported for sliding (reciprocating) movement in the opening. Thesecond portion 44B of theguide 42B is located in thecylinder 36B and is supported for sliding (reciprocating) movement in thecylinder 36B. In the embodiment illustrated byFIGS. 2 and 2A , thesecond piston 40B is separate from theguide 42B and is not attached to the guide. In this embodiment, during a compression stroke (illustrated byarrow 45 inFIG. 2A ), theguide 42B forces thesecond piston 40B toward theend surface 32B or head end of thecylinder 36B. During a charging stroke (illustrated byarrow 46 inFIG. 2A ), gas pressure applied to thecylinder 36B by thefirst piston 40A forces thesecond piston 40B toward theend surface 34B or crankshaft end of the cylinder. In an exemplary embodiment, thesecond piston 40B remains in contact with thesecond portion 44B of theguide 42B during both the entire compression stroke and the entire charging stroke. In another embodiment, thesecond piston 40B is fixed or connected for movement with theguide 42B. - Referring to
FIG. 3A , the illustratedguide 42C includes afirst portion 43C and asecond portion 44C. Thefirst portion 43C of theguide 42C is located in theopening 26C and is supported for sliding (reciprocating) movement in the opening. Thesecond portion 44C of theguide 42C is located in thecylinder 36C and is supported for sliding (reciprocating) movement in thecylinder 36C. In the embodiment illustrated byFIG. 3 , thethird piston 40C is separate from theguide 42C and is not attached to the guide. In this embodiment, during a compression stroke (illustrated byarrow 45 inFIG. 3A ), theguide 42C forces thethird piston 40C toward theend surface 32C or head end of thecylinder 36C. During a charging stroke (illustrated byarrow 46 inFIG. 3A ), gas pressure applied to thecylinder 36C by thesecond piston 40B forces thethird piston 40C toward theend surface 34C or crankshaft end of the cylinder. In an exemplary embodiment, thethird piston 40C remains in contact with thesecond portion 44C of theguide 42C during both the entire compression stroke and the entire charging stroke. In another embodiment, thethird piston 40C is fixed or connected for movement with theguide 42C. - Referring to
FIG. 3A , the illustratedguide 42D includes afirst portion 43D and asecond portion 44D. Thefirst portion 43D of theguide 42D is located in theopening 26D and is supported for sliding (reciprocating) movement in the opening. Thesecond portion 44D of theguide 42D is located in thecylinder 36D and is supported for sliding (reciprocating) movement in thecylinder 36D. In the embodiment illustrated byFIG. 3A , thefourth piston 40D is separate from theguide 42D and is not attached to the guide. In this embodiment, during a compression stroke (illustrated byarrow 45 inFIG. 3A ), theguide 42D forces thefourth piston 40D toward theend surface 32D or head end of thecylinder 36C. During a charging stroke (illustrated byarrow 46 inFIG. 3A ), gas pressure applied to thecylinder 36D by thethird piston 40C forces thefourth piston 40D toward theend surface 34D or crankshaft end of the cylinder. In an exemplary embodiment, thefourth piston 40D remains in contact with thesecond portion 44D of theguide 42D during both the entire compression stroke and the entire charging stroke. In another embodiment, thefourth piston 40D is fixed or connected for movement with theguide 42D. - Referring to
FIGS. 2 and 3 , crankshaft 50 (described below in detail) is supported for rotation about a crank axis X in first andsecond bearings second bearings base 13 by first and second and second bearing supports 54 and 56 that are located at either end of thecompressor base 13. - Referring to
FIG. 4 , thecrankshaft 50 fauns part of adrive mechanism 79 of thecompressor 10 for driving thepistons 40A-40D for movement in thecylinders 36A-36D. Thedrive mechanism 79 includes thecrankshaft 50, the drive or connectingrods 52A-52D, and theguides 42B-42D. However, a wide variety of different drive mechanisms may be used. In other embodiments the crankshaft could be connected to the pistons or coupled to thepistons 40A-40D in other manners, for example with connecting or drive rods but not guides. -
FIGS. 6A-6D and 7A-7D illustrate two embodiments ofcrankshafts 50. In the embodiments illustrated byFIGS. 6A-6D and 7A-7D thecrankshaft 50 is made from a single piece (or welded together to form a single piece). However, thecrankshaft 50 may be made from multiple pieces that are assembled together and can be disassembled. - The
crankshaft 50 includes amain shaft 70 having a generally cylindrical configuration defined by a cylindrical outer surface centered on a crank axis X of thecompressor 10. Thecrankshaft 50 rotates about the crank axis X during operation of thecompressor 10. In the illustrated embodiments, themain shaft 70 has externally threadedopposite end portions FIGS. 1-3 , themain shaft 70 is received and supported in the first andsecond bearings - Referring to
FIGS. 6A-6D and 7A-7D, in the illustrated embodiments, thecrankshaft 50 also includes first and second circular connectingrod driving bodies bodies bodies 84A. 84B may have different sizes, for example such that thebody 84A provides a different stroke thanbody 84B. Referring toFIGS. 6D and 7D , each of theeccentric bodies central axis central axis 85A and thecentral axis 85B are positioned away from the crank axis X by the same distance dl and an angle β of approximately 180 degrees (SeeFIG. 6D ) is formed between thecentral axis 85A, the crank axis X, and thecentral axis 85B. However, thebodies main shaft portion 70 that is mounted in thebearings rod driving bodies - Referring to
FIG. 4 , in an exemplary embodiment the first and second circular connectingrod driving bodies - The connecting
rod drive bodies FIGS. 6A-6D and 7A-7D, the connectingrod driving bodies main shaft 70. In another embodiment, the connecting rod driving bodies are two separately formed continuous cylindrical members that are assembled with themain shaft 70. The two separately formed continuous cylindrical members may be identical or may have different sizes to provide different strokes. - In the embodiment illustrated by
FIGS. 6A-6D , the first connectingrod driving body 84A abuts the second connectingrod driving body 84B. The first connectingrod driving body 84A may be integrally formed with the second connectingrod driving body 84B, or the connectingrod driving bodies FIGS. 6A-6D , the first connectingrod driving body 84A is connected to the second connectingrod driving body 84B only at an area of overlap between the first connecting rod driving body and the second connecting rod driving body. - In the embodiment illustrated by
FIGS. 7A-7D , the first connectingrod driving body 84A is connected to the second connecting rod driving body 84D by acircular disk 86 disposed between the first connectingrod driving body 84A and the second connectingrod driving body 84B. The connectingrod driving bodies circular disk 86 or the connectingrod driving body 84A, thecircular disk 86, and the connectingrod driving body 84A may be integrally formed. In the embodiment illustrated byFIGS. 7A-7D , thecircular disk 86 is centered on the crank axis X. Referring toFIG. 7D , the illustrated circular disk has anouter circumference 87 that is radially outward of the outer circumferences of both of the first and second connectingrod driving bodies - As shown in
FIGS. 2 and 2A a connectingrod 52A is connected between thefirst piston 40A and the first eccentric connectingrod driving body 84A and a connectingrod 52B is connected between theguide 42B (which drives thesecond piston 40B) and the second eccentric connectingrod driving body 84B. In the illustrated embodiment, thering 53A is disposed around thebody 84A to rotatably connect therod 52A to thebody 84A. A bearing may be disposed between thering 53A and thebody 84A. Thering 53B is disposed around thebody 84B to rotatably connect therod 52B to thebody 84B. A bearing may be disposed between thering 53B and thebody 84B. Apin 90B extends through thering portion 55B to pivotally connect theguide 42B therod 52B. - Referring to
FIGS. 3 and 3A , a connectingrod 52C is connected between theguide 42C (which drives thethird piston 40C) and the first eccentric connectingrod driving body 84A and a connectingrod 52D is connected between theguide 42D (which drives thefourth piston 40D) and the second eccentric connectingrod driving body 84B. In the illustrated embodiment, thering 53C is disposed around thebody 84A to rotatably connect therod 52C to thebody 84A. A bearing may be disposed between thering 53C and thebody 84A. Apin 90C extends through thering portion 55C to pivotally connect theguide 42C to therod 52C. Thering 53D is disposed around thebody 84B to rotatably connect therod 52D to thebody 84B. A bearing may be disposed between thering 53D and thebody 84B. Apin 90D extends through thering 55D to pivotally connect theguide 42D to therod 52D. - The first eccentric connecting
rod driving body 84A drives both the first andthird pistons FIG. 1B , due to the “V” configuration of the pistons, the motion of thethird piston 40C follows or lags the motion of thefirst piston 40A by rotation of the crankshaft by the angle of the “V” θ (approximately 90 degrees in the illustrated embodiment). The second eccentric connectingrod driving body 84B drives both the second andfourth pistons rod driving bodies second piston 40B follows or lags the motion of thefirst piston 40A by rotation of the crankshaft by the angle of the angular spacing β (approximately 180 degrees in the illustrated embodiment). Due to the “V” configuration of the pistons, the motion of thefourth piston 40D follows or lags the motion of thesecond piston 40B by rotation of the crankshaft by the angle of the “V” θ (approximately 90 degrees in the illustrated embodiment). - Rotation of the
main shaft 70 about the crank axis X results in reciprocating movement ofpistons 40A-40D in thecylinders 36A-36D. A drive pulley (not shown) may be located on one of theend portions 78 of themain shaft 70 to facilitate the application of a drive torque to themain shaft 70, to reciprocate thepistons 40A-40D. - As shown in
FIG. 1 , thecompressor 10 includes acylinder head assembly 100. Thecylinder head assembly 100 includes afirst cylinder head 110A and asecond cylinder head 110B that is fastened to thecylinder assembly 12 with a plurality of fasteners. In the illustrated embodiment, thecompressor 10 includes fasteners, such asbolts 102 that extend through holes in thecylinder heads base 13. When thebolts 102 are tightened down, thecylinder head 110A is clamped to the first andsecond sleeves cylinder head 110B is clamped to the third andfourth sleeves - Referring to
FIGS. 8A and 8B , for repair or servicing, each of theseparate pistons 40B-40D can be removed from thecylinders 36B-36D by removing the fasteners 102 (SeeFIG. 1 ) that hold thehead 110A and/or 110B down. Thesecond cylinder 36B andpiston 40B is illustrated inFIGS. 8A and 8B , but the other pistons and cylinders can be repaired or serviced in the same manner. Once thefasteners 102 are removed, thehead 110A, thecylinder 36B, and thepiston 40B can be removed and separated as illustrated byFIG. 8B . This arrangement allows thepiston 40B and/orcylinder 36B to be replaced or serviced without requiring the drive or connectingrod 52B to be removed from thecrankshaft 50. - As shown in
FIGS. 1 , 9 and 10, eachcylinder head 110A, 110E is formed as one piece from metal. In the illustrated embodiment, eachcylinder head lower side surface 112. Referring toFIGS. 9 and 10 , acomponent chamber 114 extends the length of eachcylinder head component chambers 114 each have a cylindrical configuration centered on anaxis 116. Eachcomponent chamber 114 has aninlet end portion 118 and anoutlet end portion 120. Theinlet end portion 118 of thefirst cylinder head 110A forms an inlet of thecompressor 10. Theoutlet end portion 120 forms an outlet of thefirst cylinder head 110A. Theinlet end portion 118 of thesecond cylinder head 110B fowls an inlet to thesecond head 110B. Referring toFIG. 1 , aconduit 119 connects the outlet of thefirst head 110A to the inlet of thesecond head 110B. The threadedoutlet end portion 120 of the second head 110 b forms an outlet of thecompressor 10. - Referring to
FIGS. 9 and 10 , the cylinder heads 110 a, 110 b have a plurality of chargingports 122A-122D that extend between thecomponent chamber 114 and thelower side surface 112. The number of chargingports 122A-122D is equal to the number ofcylinders 36A-36D in thecompressor 10 in the illustrated embodiment. Referring toFIGS. 2A and 3A , the chargingports 122A-122D establish fluid communication between thecylinders 36A-36D and thecomponent chamber 114. In the illustrated embodiment, asingle charging port 122 is associated with each one of the cylinders 36. Thus, thefirst cylinder 36A has a first chargingport 122A, thesecond cylinder 36B has asecond charging port 122B, thethird cylinder 36C has athird charging port 122C, and thefourth cylinder 36D has afourth charging port 122D. - A plurality of components are located in the
component chamber 114 of thecylinder heads inlet 118 of thefirst head 110A, thecylinders 36A-36D and theoutlet 120 of thesecond head 110B. The components include a plurality ofcheck valves 130A-130F for controlling flow of air into and out of thevarious cylinders 36A-36D, and a plurality of components or structures for positioning the check valves in thechamber 114 and inhibiting gas flow around the check valves (i.e. leakage around the check valves). In one exemplary embodiment, the components for positioning the check valves are spacers and are configured to direct air to flow between the check valves. The check valves may also be spaced apart in a variety of ways, other than using spacers. For example, one or more of the check valves may thread into thecomponent chamber 114, the component chamber may include a stop surface, etc. Any manner of positioning the check valves may be used. In the drawings, arrangements for setting the position of the check valves with respect to theinlets 118 andoutlets 120 of thecylinder heads outlet connectors - As shown in
FIGS. 9 and 10 , thecheck valves 130A-130F that are in thecylinder heads FIGS. 9 and 10 , eachillustrated check valve 130A-130F includes avalve body 132 having a generally cylindrical configuration with acentral chamber 134. Anend wall 136 is located at the upstream end of thevalve body 132. Theend wall 136 has acentral opening 138. The downstream end of thevalve body 132 is open. Thecheck valve 130A-130F each include a movable valve element in the form of aball 146. The dimensions of theball 146 are selected so that when the ball is in engagement with theend wall 136 of thevalve body 132, the ball closes theopening 138. When theball 146 is away from theend wall 136, fluid flow is enabled through the check valve. A spring biases the ball into engagement with theend wall 136 to close the valve. Further details of acceptable check valves are described in U.S. Patent Application Publication No. 2007/0065301. -
Spacers 150A-150D are positioned in thechamber 114 and space thecheck valves 130A-130F apart.FIGS. 11A and 11B illustrate thespacers 150B-150D. Thespacers 150B-150D are preferably identical to each other. Eachspacer 150B-150D is a cylindrical block of metal that has an outside diameter substantially equal in size to the inside diameter of thecomponent chamber 114 in thecylinder heads spacers 150B-150D has anupstream end portion 152 and adownstream end portion 154. However, in the illustrated embodiment, theend portions midplane 153. - In the embodiment illustrated in
FIGS. 11A and 11B , the spacer 150 has a small diametercentral opening 155 that extends for the length of the spacer between theupstream end portion 152 and thedownstream end portion 154. Thesymmetric end portions passages 158 that extend radially outward from thecentral opening 155 and anexternal groove 160 in fluid communication with thepassage 158. As a result, fluid communication is established between thecentral opening 155 of the spacer 150, and theexternal groove 160. - Referring to
FIG. 9 , thespacer 150A is shorter than thespacers 150B-150D. Thespacer 150A is a cylindrical block of metal that has an outside diameter substantially equal in size to the inside diameter of thecomponent chamber 114 in the cylinder head 110. Thespacer 150A has symmetrical upstream anddownstream end portions - A small diameter
central opening 170 extends for the length of the short spacer between theupstream end portion 164 and thedownstream end portion 166. Thespacer 150A also has aninternal passage 172 that extends radially outward from thecentral passage 170 and terminates in agroove 174 on the outer surface of thespacer 150A. As a result, fluid communication is established between the upstream anddownstream end portions spacer 150A, and theexternal groove 174. - As shown in
FIGS. 9 and 10 , aninlet connector 180 is secured in the upstream end of each of thecylinder heads fluid inlet passage 182 that communicates with the component chamber. Anoutlet connector 196 is secured in the downstream end of each of thecylinder heads outlet connector 196 has afluid outlet passage 198 that communicates with thecomponent chamber 114. The components are positioned in thecomponent chamber 114 in thecylinder heads - An
inlet check valve 130E is positioned in thecomponent chamber 114 in thefirst cylinder head 110A. Theinlet opening 138 of theinlet check valve 130E is in communication with theinlet 118 ofcompressor 10. In an exemplary embodiment, a seal may be provided between the check valve and thecomponent chamber 114. - The
spacer 150A is positioned in thecomponent chamber 114 in the cylinder head 110 such that an upstream end of the spacer 154A engages the downstream end of theinlet check valve 130E. Theexternal groove 174 on the spacer 162 aligns with the first chargingport 122A in thecylinder head 110A. As a result, fluid communication can be established between thecomponent chamber 114 and thefirst cylinder 36A. (SeeFIG. 2A ). - Referring to
FIG. 9 , a second check valve, or first cylinder check valve, 130A is positioned in thecomponent chamber 114 in thecylinder head 110A. The upstream end of thesecond check valve 130A engages the downstream end of thespacer 150A. Theinlet opening 138 of thesecond check valve 130A aligns with thecentral passage 170 in thespacer 150B. An optional seal is provided between thespacer 150A and thesecond check valve 130A. - Referring to
FIG. 9 , aspacer 150B is positioned in thecomponent chamber 114 in thecylinder head 110A. The upstream end of thespacer 150B engages the downstream end of thecheck valve 130A. Thecentral opening 155 of thespacer 150B aligns with the outlet of thecheck valve 130A. Theexternal groove 160 at the downstream end of thesecond spacer 150B aligns with the second chargingport 122B in thecylinder head 110A. As a result, fluid communication is established between thecomponent chamber 114 and thesecond cylinder 36B (SeeFIG. 2A ). - Referring to
FIG. 9 , a third check valve, or second cylinder check valve, 130B is positioned in thecomponent chamber 114 in thecylinder head 110A. The upstream end of thecheck valve 130B engages the downstream end of thespacer 150B. Theopening 138 of thecheck valve 130B aligns with thecentral passage 155 in thespacer 150B. An optional seal is formed between the spacer 150B and thecheck valve 130B. - Referring to
FIG. 10 , an optional fourth check valve, or second headinlet check valve 130C is positioned in thecomponent chamber 114 in thesecond cylinder head 110B. Theinlet opening 138 of theinlet check valve 130C is in communication with theinlet 118 ofsecond head 110B. In an exemplary embodiment, a seal may be provided between the check valve and thecomponent chamber 114. - A
spacer 150C is positioned in thecomponent chamber 114 in thecylinder head 110B. The upstream end of thespacer 150C engages the downstream end of thecheck valve 130C. Thecentral opening 155 of thespacer 150C aligns with the central opening of thecheck valve 130C. Theexternal groove 160 of thespacer 150C aligns with the chargingport 122C in thecylinder head 110B. As a result, fluid communication can be established between thecomponent chamber 114 and thethird cylinder 36C (SeeFIG. 3A ). - A fifth check valve, or third cylinder check valve, 130D is positioned in the
component chamber 114 in thecylinder head 110B. The upstream end of thecheck valve 130D engages the downstream end of thespacer 150C. Theopening 138 of thecheck valve 130D aligns with thepassage 155 in thespacer 150C. A seal may be provided betweenspacer 150C and thecheck valve 130D. - A
spacer 150D is positioned in thecomponent chamber 114 in thecylinder head 110B. The upstream end of thespacer 150D engages the downstream end of the thirdcylinder check valve 130D. The central opening 156 of thespacer 150D aligns with the central chamber of thecheck valve 130D. Theexternal groove 160 at the downstream end of thefourth spacer 150D aligns with the fourth chargingport 122D in the cylinder head 110. As a result, fluid communication can be established between thecomponent chamber 114 and thefourth cylinder 36D. - A sixth check valve, or fourth
cylinder check valve 130F is positioned in thecomponent chamber 114 in thecylinder head 110B. The upstream end of the fourthcylinder check valve 130F engages the downstream end of thespacer 150D. Theopening 138 of the check valve aligns with thecentral passage 155 in thespacer 150D. An optional seal is provided between thespacer 150D and thecheck valve 130D. - An
outlet connector 196 is fixed to the downstream end of thecylinder head 110B. Theoutlet connector 196 has afluid outlet passage 198 that is in fluid communication with thecomponent chamber 114 of thecylinder head 110B. In the illustrated embodiments, all thecheck valves 130A-F of thecompressor 10 are located in thecylinder heads - Referring once again to
FIGS. 2A and 3A , when thecompressor 10 is operating, air is admitted to the compressor through theinlet connector 180 of thefirst head 110A. The air flows through theinlet connector 180 of thefirst head 110A and to theinlet check valve 130E. - When the
compressor 10 is at the portion of its cycle in which thefirst cylinder 36A is on the intake phase, the pressure in the first cylinder is lower than the intake pressure. As a result, intake gas flows through theinlet check valve 130E and into thespacer 150A. - The gas flows from the central passage 170 (See
FIG. 9 ) of thespacer 150A, radially outward through thepassage 172, into theexternal groove 174 on the spacer. The air then flows through the first chargingport 122A and into thefirst cylinder 36A (SeeFIG. 2A ). - Referring to
FIGS. 2A and 9 , during this time, the gas flowing through theinlet check valve 130E does not flow through thesecond check valve 130A, even though thespacer 150A is open for free flow to the second check valve. This is because the pressure downstream of thesecond check valve 130A, i.e., the pressure in thesecond cylinder 36B, is higher than the intake pressure. Therefore, thesecond check valve 130A stays closed and the intake air flows into thefirst cylinder 36A. - When the
first piston 40A thereafter is compressing the air in thefirst cylinder 36A, the pressure in the first cylinder becomes higher than the intake pressure. As a result, intake air can not flow upstream through theinlet check valve 130E into thespacer 150A. Therefore, all the air flowing out of the first cylinder is directed through the first chargingport 122A, thespacer 150A, and through thesecond check valve 130A. - Referring to
FIGS. 2A and 9 , thesecond check valve 130A is forced open to allow air to flow out of thefirst cylinder 36A into thesecond spacer 150B. The air flows through thesecond spacer 150B to the radially extending passages 158 (SeeFIGS. 11A and 11B ) and theexternal groove 160 in thedownstream end 154 of thesecond spacer 150B. The air then flows from thegroove 160 into the second chargingport 122B. - The timing of the first and
second cylinders first cylinder 36A is on its exhaust phase, thesecond cylinder 36B is on its intake phase. This is achieved by the 180 degree offset β between the first and secondeccentric bodies first cylinder 36A and forced into thesecond spacer 150B is able to flow into thesecond cylinder 36B, to be further compressed, because the second cylinder is smaller in diameter than the first cylinder but has the same stroke in the illustrated exemplary embodiment. - During the time the
second cylinder 36A is being charged by thefirst cylinder 36B, the air flowing through thesecond spacer 150B does not flow through thethird check valve 130B, even through the second spacer is open to the third check valve. This is because the pressure downstream of thethird check valve 130B, (i.e., the pressure in thethird cylinder 36C), is higher than the pressure at the third check valve. Therefore, thethird check valve 130B stays closed and the air flows into thesecond cylinder 36B. - Referring to
FIGS. 3A and 10 , in a similar manner, the air that is compressed in thesecond cylinder 36B flows through theconduit 119 into thethird cylinder 36C, there to be further compressed. The air that is compressed in thethird cylinder 36C flows into thefourth cylinder 36D, there to be further compressed. The air that is compressed in thefourth cylinder 36D flows out of thecompressor 10 through the outlet connector 194. - Referring to
FIG. 12 , asystem 210 includes aconcentrator 212 that is operable to provide oxygen-enriched gas, for example, from an ambient air input. The oxygen-enriched gas is fed to aproduct tank 214. Aregulator 216 emits oxygen-enriched gas from theproduct tank 214 into aflow line 218 and feeds the same to aflow meter 220 which subsequently emits the oxygen-enriched gas to the patient at a predetermined flow rate, for example a flow rate of from 0.1 to 6 liters per minute. Optionally, theflow meter 220 can be closed so that all the oxygen-enriched gas is directed to thecompressor 10. The compressor may take a wide variety of fauns and may include any combination or subcombination of the features of the compressors described with respect toFIGS. 1-11 . Further, any combination or subcombination of the features of the compressors described with respect toFIGS. 1-11 can be used in a wide variety of different applications, including but not limited to the systems illustrated byFIGS. 12 and 13 . - Gas not directed to the patient is carried via
line 222 to two-way valve 224. A very small portion of the gas in theflow line 220 is directed throughline 226 andrestrictor 228 into anoxygen sensor 230 which detects whether or not the concentration of the oxygen is of a predetermined value, for example, at least 84 percent as directed to the patient and at least 93±3% as directed to the compressor. - When the
oxygen sensor 230 detects a concentration at or above the predetermined level, the two-way valve 224 is kept open to permit the oxygen-enriched gas to flow through thevalve 224 andline 232 into abuffer tank 234 wherein the pressure is essentially the same as the pressure in theproduct tank 214. However, should theoxygen sensor 230 not detect a suitable oxygen concentration, two-way valve 224 is closed so that theoxygen concentrator 212 can build up a sufficient oxygen concentration. This arrangement prioritizes the flow of oxygen-enriched gas so that the patient is assured of receiving a gas having a sufficient oxygen concentration therein. -
Buffer tank 234 can have aregulator 236 thereon generally set at 12 psi to admit the oxygen-enriched gas to thecompressor 10 when needed. The output of thecompressor 10 is used to fill a cylinder orportable tank 238 for ambulatory use by the patient. Alternatively, thepressure regulator 236 can be set at anywhere from about 13 to about 21 psi. A restrictor 240 controls the flow rate of gas from thebuffer tank 234 to thecompressor 10. Should the operation of thecompressor 10 cause the pressure in thebuffer tank 234 to drop below a predetermined value, a pressure sensor (not shown) automatically cuts off the flow of gas at a pressure above the pressure of the gas being fed to the patient. This prioritization assures that the patient receives priority with regard to oxygen-enriched gas. -
FIG. 13 shows asystem 210 a that is somewhat different from thesystem 210 ofFIG. 12 . In thesystem 210 a, thecompressor 10 includes its own oxygen sensor and control circuitry, so that the elements 224-232 are not present as they are in the system shown inFIG. 12 . In addition, theregulator 236 is not present on the buffer tank. A flow restrictor may be provided between the concentrator and the buffer tank. (It should be noted that thebuffer tank 234 is optional in all systems, and that the compressor could be fed directly from the product tank). - The foregoing description relates to a four-cylinder compressor. However, the features described in this application are applicable to compressors that have different numbers of cylinders. In addition, disclosed features may be used in compressors having cylinder heads with different check valve and spacer designs.
- While the present invention has been illustrated by the description of embodiments thereof, and while the embodiments have been described in considerable detail, it is not the intention of the applicant to restrict or in any way limit the scope of the appended claims to such detail. Additional advantages and modifications will readily appear to those skilled in the art. Still further, while cylindrical components have been shown and described herein, other geometries can be used including elliptical, polygonal (e.g., square, rectangular, triangular, hexagonal, etc.) and other shapes can also be used. Therefore, the invention, in its broader aspects, is not limited to the specific details, the representative apparatus, and illustrative examples shown and described. Accordingly, departures can be made from such details without departing from the spirit or scope of the applicant's general inventive concept.
Claims (30)
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US12/857,844 US20110038740A1 (en) | 2009-08-17 | 2010-08-17 | Compressor |
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US23433009P | 2009-08-17 | 2009-08-17 | |
US12/857,844 US20110038740A1 (en) | 2009-08-17 | 2010-08-17 | Compressor |
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US20110038740A1 true US20110038740A1 (en) | 2011-02-17 |
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US12/857,844 Abandoned US20110038740A1 (en) | 2009-08-17 | 2010-08-17 | Compressor |
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EP (1) | EP2467578A1 (en) |
CN (1) | CN102575520A (en) |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100084913A1 (en) * | 2008-10-07 | 2010-04-08 | Mando Corporation | Electronic control brake system |
WO2012162389A1 (en) | 2011-05-24 | 2012-11-29 | Invacare Corp. | Oxygen compressor with boost stage |
US20140301865A1 (en) * | 2013-04-05 | 2014-10-09 | Enginetics, Llc | Hybridized compressor |
WO2015172144A1 (en) * | 2014-05-09 | 2015-11-12 | Westinghouse Air Brake Technologies Corporation | Radially configured oil-free compressor |
US9624918B2 (en) | 2012-02-03 | 2017-04-18 | Invacare Corporation | Pumping device |
US20180017045A1 (en) * | 2015-01-22 | 2018-01-18 | Spx Flow Technology Norderstedt Gmbh | Process pump having a crank drive |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107061225A (en) * | 2017-03-20 | 2017-08-18 | 上海瀚氢动力科技有限公司 | Suitable for the gas pressurized device of flammable explosive gas |
Citations (103)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US519423A (en) * | 1894-05-08 | Apparatus for treating ramie or other fibrous growths | ||
US1494741A (en) * | 1920-08-25 | 1924-05-20 | Willis W Hale | Air compressor |
US1610869A (en) * | 1922-06-12 | 1926-12-14 | Hubert R Loranger | Compressor for refrigerating apparatus |
US1697181A (en) * | 1927-11-03 | 1929-01-01 | Harold Taylor | Fluid-pressure pump |
US1746394A (en) * | 1927-11-05 | 1930-02-11 | Herbert C Guild | Multistage compressor |
US1764655A (en) * | 1927-11-07 | 1930-06-17 | Kelvinator Corp | Compressor |
US1787643A (en) * | 1926-11-30 | 1931-01-06 | Sulzer Ag | High-pressure reciprocating compressor |
US1846655A (en) * | 1929-11-15 | 1932-02-23 | Champion Pneumatic Machinery C | Compressor |
US1873878A (en) * | 1928-08-21 | 1932-08-23 | Doherty Res Co | High temperature adiabatic compressor |
US1900858A (en) * | 1929-02-09 | 1933-03-07 | Doherty Res Co | Three-cylinder tandem engine |
US1910636A (en) * | 1929-11-19 | 1933-05-23 | George L Pownall | Ice machine compressor |
US1964679A (en) * | 1932-09-28 | 1934-06-26 | Garland P Springfield | Compressor |
US2030759A (en) * | 1934-01-09 | 1936-02-11 | Neal Bob | Compressor unit |
US2141057A (en) * | 1937-09-13 | 1938-12-20 | Virgil Scott | Gas compressor |
US2151825A (en) * | 1936-10-15 | 1939-03-28 | Westinghouse Air Brake Co | Fluid compressor |
US2312335A (en) * | 1939-04-24 | 1943-03-02 | Sullivan Machinery Co | Compressor |
US2373780A (en) * | 1941-09-29 | 1945-04-17 | Ricardo Harry Ralph | Multistage compressor |
US2427638A (en) * | 1944-08-16 | 1947-09-16 | Vilter Mfg Co | Compressor |
US2550369A (en) * | 1947-07-18 | 1951-04-24 | Dunlop Rubber Co | Single-acting reciprocating engine |
US2628015A (en) * | 1949-11-09 | 1953-02-10 | Franz J Neugebauer | Engine-driven air compressor |
US2650018A (en) * | 1945-02-23 | 1953-08-25 | Joy Mfg Co | Compressor |
US2944627A (en) * | 1958-02-12 | 1960-07-12 | Exxon Research Engineering Co | Method and apparatus for fractionating gaseous mixtures by adsorption |
US3072317A (en) * | 1960-02-24 | 1963-01-08 | Joy Mfg Co | Multi-stage compressor |
US3119410A (en) * | 1961-04-27 | 1964-01-28 | Nat Distillers Chem Corp | High pressure valve |
US3203357A (en) * | 1962-08-01 | 1965-08-31 | Delorme Jacques Eugene Antonin | Pumps |
US3313091A (en) * | 1963-11-04 | 1967-04-11 | Exxon Research Engineering Co | Vacuum cycle adsorption |
US3448664A (en) * | 1967-10-25 | 1969-06-10 | Gen Motors Corp | Floating crown piston |
US3510233A (en) * | 1967-06-07 | 1970-05-05 | Burckhardt Ag Maschf | Cylinder structure for single or multistage piston compressors |
US3692434A (en) * | 1970-11-02 | 1972-09-19 | Kohlenberger Inc | Fluid compressor apparatus |
US3898047A (en) * | 1973-07-17 | 1975-08-05 | Bendix Corp | Oxygen generation system |
US3964866A (en) * | 1974-09-13 | 1976-06-22 | William Barney Shelby | Helium reclamation |
US4013429A (en) * | 1975-06-04 | 1977-03-22 | Air Products And Chemicals, Inc. | Fractionation of air by adsorption |
US4194890A (en) * | 1976-11-26 | 1980-03-25 | Greene & Kellogg, Inc. | Pressure swing adsorption process and system for gas separation |
US4263018A (en) * | 1978-02-01 | 1981-04-21 | Greene & Kellogg | Pressure swing adsorption process and system for gas separation |
US4263524A (en) * | 1977-09-19 | 1981-04-21 | Siemens Aktiengesellschaft | Electric two motor drive |
US4331455A (en) * | 1979-05-11 | 1982-05-25 | Osaka Oxygen Industries, Ltd. | Method of producing oxygen rich gas utilizing an oxygen concentrator having good start-up characteristics |
US4334833A (en) * | 1980-10-28 | 1982-06-15 | Antonio Gozzi | Four-stage gas compressor |
US4428372A (en) * | 1980-07-31 | 1984-01-31 | Linde Aktiengesellschaft | Process and apparatus for providing breathing gas |
US4449990A (en) * | 1982-09-10 | 1984-05-22 | Invacare Respiratory Corp. | Method and apparatus for fractioning oxygen |
US4456440A (en) * | 1981-03-25 | 1984-06-26 | Uhde Gmbh | Valve assembly for high-pressure pumps |
US4465436A (en) * | 1981-05-25 | 1984-08-14 | Siemens Aktiengesellschaft | Radial piston compressor |
US4505333A (en) * | 1981-09-02 | 1985-03-19 | Ricks Sr Tom E | Methods of and means for low volume wellhead compression hydrocarbon _gas |
US4516424A (en) * | 1982-07-09 | 1985-05-14 | Hudson Oxygen Therapy Sales Company | Oxygen concentrator monitor and regulation assembly |
US4573886A (en) * | 1979-10-06 | 1986-03-04 | Woma-Apparatebau Wolfgang Massberg & Co. Gmbh | Valve assembly for high pressure pump |
US4576616A (en) * | 1982-07-27 | 1986-03-18 | Proto-Med. Inc. | Method and apparatus for concentrating oxygen |
US4636226A (en) * | 1985-08-26 | 1987-01-13 | Vbm Corporation | High pressure oxygen production system |
US4638694A (en) * | 1984-06-27 | 1987-01-27 | Ae Plc | Manufacture of pistons |
US4643651A (en) * | 1983-08-31 | 1987-02-17 | Groupe Industriel De Realisation Et D'application Gira S.A. | Constant flow rate liquid pumping system |
US4645428A (en) * | 1985-10-31 | 1987-02-24 | Manuel Arregui | Radial piston pump |
US4670223A (en) * | 1983-01-26 | 1987-06-02 | Le Masne S.A. | Apparatus for producing sterile air for medical use |
US4673415A (en) * | 1986-05-22 | 1987-06-16 | Vbm Corporation | Oxygen production system with two stage oxygen pressurization |
US4700663A (en) * | 1986-04-21 | 1987-10-20 | Dunn Larry W | Air compressor |
US4765804A (en) * | 1986-10-01 | 1988-08-23 | The Boc Group, Inc. | PSA process and apparatus employing gaseous diffusion barriers |
US4844059A (en) * | 1986-01-22 | 1989-07-04 | Draegerwerk Ag | Method and apparatus for enriching respiratory gas with oxygen and delivering it to a patient |
US4860803A (en) * | 1988-09-15 | 1989-08-29 | The United States Of America As Represented By The Department Of Commerce | Continuous nitrox mixer |
US4905685A (en) * | 1987-04-14 | 1990-03-06 | Siemens Aktiengesellschaft | Inhalation anaesthesia equipment |
US4922900A (en) * | 1988-05-19 | 1990-05-08 | Dragerwerk Aktiengesellschaft | Pumping arrangement for supplying a ventilating apparatus with breathing gas |
US4948391A (en) * | 1988-05-12 | 1990-08-14 | Vacuum Optics Corporation Of Japan | Pressure swing adsorption process for gas separation |
US4983190A (en) * | 1985-05-21 | 1991-01-08 | Pall Corporation | Pressure-swing adsorption system and method for NBC collective protection |
US4991616A (en) * | 1988-01-11 | 1991-02-12 | Desarrollos, Estudios Y Patentes, S.A. | Installation for the supply of oxygen in hospitals and the like |
US5020974A (en) * | 1988-11-17 | 1991-06-04 | Normalair-Garrett (Holdings) Limited | Fluid compressors |
US5033940A (en) * | 1989-01-19 | 1991-07-23 | Sulzer Brothers Limited | Reciprocating high-pressure compressor piston with annular clearance |
US5078580A (en) * | 1991-03-29 | 1992-01-07 | Dresser-Rand Company | Plural-stage gas compressor |
US5078757A (en) * | 1989-05-24 | 1992-01-07 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for the production of gaseous oxygen under pressure |
US5163818A (en) * | 1990-02-05 | 1992-11-17 | Ametek, Inc. | Automatic constant air flow rate pump unit for sampling air |
US5195874A (en) * | 1990-06-19 | 1993-03-23 | Tokico Ltd. | Multistage compressor |
US5199423A (en) * | 1990-02-10 | 1993-04-06 | Normalair-Garrett (Holdings) Ltd. | Oxygen-rich gas breathing systems for passenger carrying aircraft |
US5207806A (en) * | 1991-10-08 | 1993-05-04 | Praxair Technology, Inc. | Dual product pressure swing adsorption and membrane operations |
US5236231A (en) * | 1989-10-26 | 1993-08-17 | Union Oil Company Of California | Brittle lined pipe connector |
US5237987A (en) * | 1990-06-07 | 1993-08-24 | Infrasonics, Inc. | Human lung ventilator system |
US5314314A (en) * | 1993-06-21 | 1994-05-24 | Detroit Diesel Corporation | Two-cycle engine compressor |
US5405249A (en) * | 1992-11-11 | 1995-04-11 | Ultra Electronics Limited | Gas supply apparatus |
US5490871A (en) * | 1993-01-30 | 1996-02-13 | The Boc Group Plc | Gas separation |
US5531807A (en) * | 1994-11-30 | 1996-07-02 | Airsep Corporation | Apparatus and method for supplying oxygen to passengers on board aircraft |
US5593291A (en) * | 1995-07-25 | 1997-01-14 | Thomas Industries Inc. | Fluid pumping apparatus |
US5593478A (en) * | 1994-09-28 | 1997-01-14 | Sequal Technologies, Inc. | Fluid fractionator |
US5613837A (en) * | 1994-04-27 | 1997-03-25 | Aisin Seiki Kabushiki Kaisha | Air compressor inlet and outlet valve arrangement |
US5704964A (en) * | 1994-12-27 | 1998-01-06 | Nippon Sanso Corporation | Pressure swing adsorption process |
US5709536A (en) * | 1995-01-30 | 1998-01-20 | Titan Tool, Inc. | Hydro mechanical packingless pump and liquid spray system |
US5755561A (en) * | 1994-10-26 | 1998-05-26 | Francois Couillard | Piston pumping system delivering fluids with a substantially constant flow rate |
US5858062A (en) * | 1997-02-10 | 1999-01-12 | Litton Systems, Inc. | Oxygen concentrator |
US5863186A (en) * | 1996-10-15 | 1999-01-26 | Green; John S. | Method for compressing gases using a multi-stage hydraulically-driven compressor |
US5875783A (en) * | 1997-04-09 | 1999-03-02 | Dragerwerk Ag | Gas delivery means for respirators and anesthesia apparatus |
US5893944A (en) * | 1997-09-30 | 1999-04-13 | Dong; Jung Hyi | Portable PSA oxygen generator |
US5897305A (en) * | 1996-08-08 | 1999-04-27 | Roddis; Gravatt Keith | Valve assembly for compressors |
US6183211B1 (en) * | 1999-02-09 | 2001-02-06 | Devilbiss Air Power Company | Two stage oil free air compressor |
US6203285B1 (en) * | 1998-05-18 | 2001-03-20 | Westinghouse Air Brake Company | Compressor intercooler unloader arrangement |
US6287085B1 (en) * | 2000-01-26 | 2001-09-11 | Westinghouse Air Brake Company | Rapid unloader retrofits |
US6302107B1 (en) * | 1997-10-01 | 2001-10-16 | Invacare Corporation | Apparatus and method for forming oxygen-enriched gas and compression thereof for high-pressure mobile storage utilization |
US6352057B1 (en) * | 1999-01-07 | 2002-03-05 | Daniel Drecq | Super charged two-stroke or four-stroke internal combustion engine |
US6393802B1 (en) * | 1999-12-22 | 2002-05-28 | Sunrise Medical Hhg, Inc. | Cylinder filler for use with an oxygen concentrator |
US6422237B1 (en) * | 1999-05-18 | 2002-07-23 | DRäGER MEDIZINTECHNIK GMBH | Respirator with a breathing circuit |
US6508638B2 (en) * | 2000-03-06 | 2003-01-21 | Christopher L. Sagar | Dual stage compressor |
US6666656B2 (en) * | 2001-10-12 | 2003-12-23 | Hans-Georg G. Pressel | Compressor apparatus |
US6684755B2 (en) * | 2002-01-28 | 2004-02-03 | Bristol Compressors, Inc. | Crankshaft, compressor using crankshaft, and method for assembling a compressor including installing crankshaft |
US6695591B2 (en) * | 2002-05-20 | 2004-02-24 | Grimmer Industries, Inc. | Multi-stage gas compressor system |
US6776587B2 (en) * | 1999-12-21 | 2004-08-17 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Dual-stage, plunger-type piston compressor with minimal vibration |
US6889726B2 (en) * | 2002-10-25 | 2005-05-10 | Invacare Corporation | Method and apparatus for filling portable high pressure cylinders with respiratory oxygen |
US20060000475A1 (en) * | 2001-10-12 | 2006-01-05 | Ric Investments, Llc. | Auto-titration bi-level pressure support system and method of using same |
US7178552B2 (en) * | 2003-06-05 | 2007-02-20 | Miura Co., Ltd. | Valve |
US20070065301A1 (en) * | 2005-09-21 | 2007-03-22 | Gerold Goertzen | System and method for providing oxygen |
US7204249B1 (en) * | 1997-10-01 | 2007-04-17 | Invcare Corporation | Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage |
US7244107B2 (en) * | 2005-03-24 | 2007-07-17 | Merits Health Products Co., Ltd. | Home oxygen-compression apparatus |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3824659A (en) * | 1973-03-05 | 1974-07-23 | Maschf Augsburg Nuernberg Ag | Crankshaft with hardened transition portions and its manufacture |
ZA785334B (en) * | 1977-09-22 | 1979-09-26 | J Wishart | Improved split cycle internal combustion engines |
DE4317091A1 (en) * | 1993-05-21 | 1994-11-24 | Audi Ag | Method of increasing the strength of a crankshaft |
CN2351587Y (en) * | 1998-10-06 | 1999-12-01 | 浙江开山股份有限公司 | Two-stage compressed air compressor |
JP3789691B2 (en) * | 1999-09-14 | 2006-06-28 | 三洋電機株式会社 | High pressure compressor compressor |
WO2009034421A1 (en) * | 2007-09-13 | 2009-03-19 | Ecole polytechnique fédérale de Lausanne (EPFL) | A multistage hydro-pneumatic motor-compressor |
CN201190646Y (en) * | 2008-04-23 | 2009-02-04 | 英维康医疗器械(苏州)有限公司 | Integral gas compressor |
-
2010
- 2010-08-17 CN CN201080046643XA patent/CN102575520A/en active Pending
- 2010-08-17 US US12/857,844 patent/US20110038740A1/en not_active Abandoned
- 2010-08-17 WO PCT/US2010/045705 patent/WO2011022361A1/en active Application Filing
- 2010-08-17 AU AU2010284357A patent/AU2010284357A1/en not_active Abandoned
- 2010-08-17 EP EP10810463A patent/EP2467578A1/en not_active Withdrawn
- 2010-08-17 CA CA2772244A patent/CA2772244A1/en not_active Abandoned
Patent Citations (108)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US519423A (en) * | 1894-05-08 | Apparatus for treating ramie or other fibrous growths | ||
US1494741A (en) * | 1920-08-25 | 1924-05-20 | Willis W Hale | Air compressor |
US1610869A (en) * | 1922-06-12 | 1926-12-14 | Hubert R Loranger | Compressor for refrigerating apparatus |
US1787643A (en) * | 1926-11-30 | 1931-01-06 | Sulzer Ag | High-pressure reciprocating compressor |
US1697181A (en) * | 1927-11-03 | 1929-01-01 | Harold Taylor | Fluid-pressure pump |
US1746394A (en) * | 1927-11-05 | 1930-02-11 | Herbert C Guild | Multistage compressor |
US1764655A (en) * | 1927-11-07 | 1930-06-17 | Kelvinator Corp | Compressor |
US1873878A (en) * | 1928-08-21 | 1932-08-23 | Doherty Res Co | High temperature adiabatic compressor |
US1900858A (en) * | 1929-02-09 | 1933-03-07 | Doherty Res Co | Three-cylinder tandem engine |
US1846655A (en) * | 1929-11-15 | 1932-02-23 | Champion Pneumatic Machinery C | Compressor |
US1910636A (en) * | 1929-11-19 | 1933-05-23 | George L Pownall | Ice machine compressor |
US1964679A (en) * | 1932-09-28 | 1934-06-26 | Garland P Springfield | Compressor |
US2030759A (en) * | 1934-01-09 | 1936-02-11 | Neal Bob | Compressor unit |
US2151825A (en) * | 1936-10-15 | 1939-03-28 | Westinghouse Air Brake Co | Fluid compressor |
US2141057A (en) * | 1937-09-13 | 1938-12-20 | Virgil Scott | Gas compressor |
US2312335A (en) * | 1939-04-24 | 1943-03-02 | Sullivan Machinery Co | Compressor |
US2373780A (en) * | 1941-09-29 | 1945-04-17 | Ricardo Harry Ralph | Multistage compressor |
US2427638A (en) * | 1944-08-16 | 1947-09-16 | Vilter Mfg Co | Compressor |
US2650018A (en) * | 1945-02-23 | 1953-08-25 | Joy Mfg Co | Compressor |
US2550369A (en) * | 1947-07-18 | 1951-04-24 | Dunlop Rubber Co | Single-acting reciprocating engine |
US2628015A (en) * | 1949-11-09 | 1953-02-10 | Franz J Neugebauer | Engine-driven air compressor |
US2944627A (en) * | 1958-02-12 | 1960-07-12 | Exxon Research Engineering Co | Method and apparatus for fractionating gaseous mixtures by adsorption |
US3072317A (en) * | 1960-02-24 | 1963-01-08 | Joy Mfg Co | Multi-stage compressor |
US3119410A (en) * | 1961-04-27 | 1964-01-28 | Nat Distillers Chem Corp | High pressure valve |
US3203357A (en) * | 1962-08-01 | 1965-08-31 | Delorme Jacques Eugene Antonin | Pumps |
US3313091A (en) * | 1963-11-04 | 1967-04-11 | Exxon Research Engineering Co | Vacuum cycle adsorption |
US3510233A (en) * | 1967-06-07 | 1970-05-05 | Burckhardt Ag Maschf | Cylinder structure for single or multistage piston compressors |
US3448664A (en) * | 1967-10-25 | 1969-06-10 | Gen Motors Corp | Floating crown piston |
US3692434A (en) * | 1970-11-02 | 1972-09-19 | Kohlenberger Inc | Fluid compressor apparatus |
US3898047A (en) * | 1973-07-17 | 1975-08-05 | Bendix Corp | Oxygen generation system |
US3964866A (en) * | 1974-09-13 | 1976-06-22 | William Barney Shelby | Helium reclamation |
US4013429A (en) * | 1975-06-04 | 1977-03-22 | Air Products And Chemicals, Inc. | Fractionation of air by adsorption |
US4194890A (en) * | 1976-11-26 | 1980-03-25 | Greene & Kellogg, Inc. | Pressure swing adsorption process and system for gas separation |
US4263524A (en) * | 1977-09-19 | 1981-04-21 | Siemens Aktiengesellschaft | Electric two motor drive |
US4263018A (en) * | 1978-02-01 | 1981-04-21 | Greene & Kellogg | Pressure swing adsorption process and system for gas separation |
US4331455A (en) * | 1979-05-11 | 1982-05-25 | Osaka Oxygen Industries, Ltd. | Method of producing oxygen rich gas utilizing an oxygen concentrator having good start-up characteristics |
US4573886A (en) * | 1979-10-06 | 1986-03-04 | Woma-Apparatebau Wolfgang Massberg & Co. Gmbh | Valve assembly for high pressure pump |
US4428372A (en) * | 1980-07-31 | 1984-01-31 | Linde Aktiengesellschaft | Process and apparatus for providing breathing gas |
US4334833A (en) * | 1980-10-28 | 1982-06-15 | Antonio Gozzi | Four-stage gas compressor |
US4456440A (en) * | 1981-03-25 | 1984-06-26 | Uhde Gmbh | Valve assembly for high-pressure pumps |
US4465436A (en) * | 1981-05-25 | 1984-08-14 | Siemens Aktiengesellschaft | Radial piston compressor |
US4505333A (en) * | 1981-09-02 | 1985-03-19 | Ricks Sr Tom E | Methods of and means for low volume wellhead compression hydrocarbon _gas |
US4516424A (en) * | 1982-07-09 | 1985-05-14 | Hudson Oxygen Therapy Sales Company | Oxygen concentrator monitor and regulation assembly |
US4576616A (en) * | 1982-07-27 | 1986-03-18 | Proto-Med. Inc. | Method and apparatus for concentrating oxygen |
US4449990A (en) * | 1982-09-10 | 1984-05-22 | Invacare Respiratory Corp. | Method and apparatus for fractioning oxygen |
US4670223A (en) * | 1983-01-26 | 1987-06-02 | Le Masne S.A. | Apparatus for producing sterile air for medical use |
US4643651A (en) * | 1983-08-31 | 1987-02-17 | Groupe Industriel De Realisation Et D'application Gira S.A. | Constant flow rate liquid pumping system |
US4638694A (en) * | 1984-06-27 | 1987-01-27 | Ae Plc | Manufacture of pistons |
US4983190A (en) * | 1985-05-21 | 1991-01-08 | Pall Corporation | Pressure-swing adsorption system and method for NBC collective protection |
US4636226A (en) * | 1985-08-26 | 1987-01-13 | Vbm Corporation | High pressure oxygen production system |
US4645428A (en) * | 1985-10-31 | 1987-02-24 | Manuel Arregui | Radial piston pump |
US4844059A (en) * | 1986-01-22 | 1989-07-04 | Draegerwerk Ag | Method and apparatus for enriching respiratory gas with oxygen and delivering it to a patient |
US4700663A (en) * | 1986-04-21 | 1987-10-20 | Dunn Larry W | Air compressor |
US4673415A (en) * | 1986-05-22 | 1987-06-16 | Vbm Corporation | Oxygen production system with two stage oxygen pressurization |
US4765804A (en) * | 1986-10-01 | 1988-08-23 | The Boc Group, Inc. | PSA process and apparatus employing gaseous diffusion barriers |
US4905685A (en) * | 1987-04-14 | 1990-03-06 | Siemens Aktiengesellschaft | Inhalation anaesthesia equipment |
US4991616A (en) * | 1988-01-11 | 1991-02-12 | Desarrollos, Estudios Y Patentes, S.A. | Installation for the supply of oxygen in hospitals and the like |
US4948391A (en) * | 1988-05-12 | 1990-08-14 | Vacuum Optics Corporation Of Japan | Pressure swing adsorption process for gas separation |
US4922900A (en) * | 1988-05-19 | 1990-05-08 | Dragerwerk Aktiengesellschaft | Pumping arrangement for supplying a ventilating apparatus with breathing gas |
US4860803A (en) * | 1988-09-15 | 1989-08-29 | The United States Of America As Represented By The Department Of Commerce | Continuous nitrox mixer |
US5020974A (en) * | 1988-11-17 | 1991-06-04 | Normalair-Garrett (Holdings) Limited | Fluid compressors |
US5033940A (en) * | 1989-01-19 | 1991-07-23 | Sulzer Brothers Limited | Reciprocating high-pressure compressor piston with annular clearance |
US5078757A (en) * | 1989-05-24 | 1992-01-07 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for the production of gaseous oxygen under pressure |
US5236231A (en) * | 1989-10-26 | 1993-08-17 | Union Oil Company Of California | Brittle lined pipe connector |
US5163818A (en) * | 1990-02-05 | 1992-11-17 | Ametek, Inc. | Automatic constant air flow rate pump unit for sampling air |
US5199423A (en) * | 1990-02-10 | 1993-04-06 | Normalair-Garrett (Holdings) Ltd. | Oxygen-rich gas breathing systems for passenger carrying aircraft |
US5237987A (en) * | 1990-06-07 | 1993-08-24 | Infrasonics, Inc. | Human lung ventilator system |
US5195874A (en) * | 1990-06-19 | 1993-03-23 | Tokico Ltd. | Multistage compressor |
US5078580A (en) * | 1991-03-29 | 1992-01-07 | Dresser-Rand Company | Plural-stage gas compressor |
US5207806A (en) * | 1991-10-08 | 1993-05-04 | Praxair Technology, Inc. | Dual product pressure swing adsorption and membrane operations |
US5405249A (en) * | 1992-11-11 | 1995-04-11 | Ultra Electronics Limited | Gas supply apparatus |
US5490871A (en) * | 1993-01-30 | 1996-02-13 | The Boc Group Plc | Gas separation |
US5314314A (en) * | 1993-06-21 | 1994-05-24 | Detroit Diesel Corporation | Two-cycle engine compressor |
US5613837A (en) * | 1994-04-27 | 1997-03-25 | Aisin Seiki Kabushiki Kaisha | Air compressor inlet and outlet valve arrangement |
US5593478A (en) * | 1994-09-28 | 1997-01-14 | Sequal Technologies, Inc. | Fluid fractionator |
US5730778A (en) * | 1994-09-28 | 1998-03-24 | Sequal Technologies, Inc. | Fluid fractionator |
US5755561A (en) * | 1994-10-26 | 1998-05-26 | Francois Couillard | Piston pumping system delivering fluids with a substantially constant flow rate |
US5531807A (en) * | 1994-11-30 | 1996-07-02 | Airsep Corporation | Apparatus and method for supplying oxygen to passengers on board aircraft |
US5704964A (en) * | 1994-12-27 | 1998-01-06 | Nippon Sanso Corporation | Pressure swing adsorption process |
US5709536A (en) * | 1995-01-30 | 1998-01-20 | Titan Tool, Inc. | Hydro mechanical packingless pump and liquid spray system |
US5593291A (en) * | 1995-07-25 | 1997-01-14 | Thomas Industries Inc. | Fluid pumping apparatus |
US5897305A (en) * | 1996-08-08 | 1999-04-27 | Roddis; Gravatt Keith | Valve assembly for compressors |
US5863186A (en) * | 1996-10-15 | 1999-01-26 | Green; John S. | Method for compressing gases using a multi-stage hydraulically-driven compressor |
US5858062A (en) * | 1997-02-10 | 1999-01-12 | Litton Systems, Inc. | Oxygen concentrator |
US5875783A (en) * | 1997-04-09 | 1999-03-02 | Dragerwerk Ag | Gas delivery means for respirators and anesthesia apparatus |
US5893944A (en) * | 1997-09-30 | 1999-04-13 | Dong; Jung Hyi | Portable PSA oxygen generator |
US7204249B1 (en) * | 1997-10-01 | 2007-04-17 | Invcare Corporation | Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage |
US8123497B2 (en) * | 1997-10-01 | 2012-02-28 | Invacare Corporation | Apparatus for compressing and storing oxygen enriched gas |
US20080118373A1 (en) * | 1997-10-01 | 2008-05-22 | Invacare Corporation | Apparatus for compressing and storing oxygen enriched gas |
US6302107B1 (en) * | 1997-10-01 | 2001-10-16 | Invacare Corporation | Apparatus and method for forming oxygen-enriched gas and compression thereof for high-pressure mobile storage utilization |
US20020014237A1 (en) * | 1997-10-01 | 2002-02-07 | Invacare Corporation | Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage |
US20040103895A1 (en) * | 1997-10-01 | 2004-06-03 | Invacare Corporation | Oxygen conserving device utilizing a radial multi-stage compressor for high-pressure mobile storage |
US6203285B1 (en) * | 1998-05-18 | 2001-03-20 | Westinghouse Air Brake Company | Compressor intercooler unloader arrangement |
US6352057B1 (en) * | 1999-01-07 | 2002-03-05 | Daniel Drecq | Super charged two-stroke or four-stroke internal combustion engine |
US6183211B1 (en) * | 1999-02-09 | 2001-02-06 | Devilbiss Air Power Company | Two stage oil free air compressor |
US6422237B1 (en) * | 1999-05-18 | 2002-07-23 | DRäGER MEDIZINTECHNIK GMBH | Respirator with a breathing circuit |
US6776587B2 (en) * | 1999-12-21 | 2004-08-17 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Dual-stage, plunger-type piston compressor with minimal vibration |
US6393802B1 (en) * | 1999-12-22 | 2002-05-28 | Sunrise Medical Hhg, Inc. | Cylinder filler for use with an oxygen concentrator |
US6287085B1 (en) * | 2000-01-26 | 2001-09-11 | Westinghouse Air Brake Company | Rapid unloader retrofits |
US6508638B2 (en) * | 2000-03-06 | 2003-01-21 | Christopher L. Sagar | Dual stage compressor |
US6666656B2 (en) * | 2001-10-12 | 2003-12-23 | Hans-Georg G. Pressel | Compressor apparatus |
US20060000475A1 (en) * | 2001-10-12 | 2006-01-05 | Ric Investments, Llc. | Auto-titration bi-level pressure support system and method of using same |
US6684755B2 (en) * | 2002-01-28 | 2004-02-03 | Bristol Compressors, Inc. | Crankshaft, compressor using crankshaft, and method for assembling a compressor including installing crankshaft |
US6695591B2 (en) * | 2002-05-20 | 2004-02-24 | Grimmer Industries, Inc. | Multi-stage gas compressor system |
US6889726B2 (en) * | 2002-10-25 | 2005-05-10 | Invacare Corporation | Method and apparatus for filling portable high pressure cylinders with respiratory oxygen |
US7178552B2 (en) * | 2003-06-05 | 2007-02-20 | Miura Co., Ltd. | Valve |
US7244107B2 (en) * | 2005-03-24 | 2007-07-17 | Merits Health Products Co., Ltd. | Home oxygen-compression apparatus |
US20070065301A1 (en) * | 2005-09-21 | 2007-03-22 | Gerold Goertzen | System and method for providing oxygen |
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Also Published As
Publication number | Publication date |
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CN102575520A (en) | 2012-07-11 |
AU2010284357A1 (en) | 2012-03-08 |
WO2011022361A1 (en) | 2011-02-24 |
CA2772244A1 (en) | 2011-02-24 |
EP2467578A1 (en) | 2012-06-27 |
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