CA1284598C - Self-loading peristaltic pump - Google Patents
Self-loading peristaltic pumpInfo
- Publication number
- CA1284598C CA1284598C CA000575140A CA575140A CA1284598C CA 1284598 C CA1284598 C CA 1284598C CA 000575140 A CA000575140 A CA 000575140A CA 575140 A CA575140 A CA 575140A CA 1284598 C CA1284598 C CA 1284598C
- Authority
- CA
- Canada
- Prior art keywords
- rotor
- tube
- pumping region
- race
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- 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
- F04B43/00—Machines, pumps, or pumping installations having flexible working members
- F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
- F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M60/00—Blood pumps; Devices for mechanical circulatory actuation; Balloon pumps for circulatory assistance
- A61M60/20—Type thereof
- A61M60/247—Positive displacement blood pumps
- A61M60/253—Positive displacement blood pumps including a displacement member directly acting on the blood
- A61M60/268—Positive displacement blood pumps including a displacement member directly acting on the blood the displacement member being flexible, e.g. membranes, diaphragms or bladders
- A61M60/279—Peristaltic pumps, e.g. roller pumps
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/12—General characteristics of the apparatus with interchangeable cassettes forming partially or totally the fluid circuit
Abstract
Abstract of the Invention A self-loading peristaltic pump including a rotor rotatably mounted about a rotor axis, and a race having an internal surface for supporting a flexible tube in a pumping region between the rotor and the race, the surface including points that are at equal radii from the rotor axis in planes that are perpendicular to the rotor axis, the rotor including a roller for intermittently and progressively compressing the flexible tube against the race in the pumping region, the rotor including a radially extending rotor tab located outside of the pumping region for displacing the flexible tube toward the pumping region as the rotor rotates.
Description
~2Eil459~3 SELF-LOADING PERISTALTIC PUMP
Field of the Invention ~he invention relates to peristaltic pumps.
~ackqround of the Invention In one type of peristaltic pump, a flexible tube is compressad between rollers that are carried by a rotor and travel along a circular path and a race that has a surface ad~acent to and concentric with the path of the rollers. As the occluded portion of the tube is advanced, the fluid in front of it is forced to travel through the tube.
A USQ of such a pump is in extracorporeal blood treatment. The peristaltic pumps have been provided on the ~ront panel of a blood processing machines, employing flexible tube portions o~ a disposable tubing set that is changed for use with a different donor~patient. Some tubing sets have included cartridges that are removably mounted on the machine and .carry flexible tubes in posi~ion to be acted upon by pump rollers on the fron~ panel of ~he machine, e.g., DeVries U.S. Patent No. 4,379,452: published European Patent Application 0,13~,436; Heath et al., U.S. Serial No. 74~,S45, i:Led June 25, l9~5; and Finsterwald et al., Canadian Application 533,243, filed March 27, 1987.
In the Finsterwald et al. '539 patent application, there is description of a pump that self-loads a 1exible tube portion placed in a tube mounting region adjacent to a tube pumping region between the race and the rollers, as the rollers rotate, owinq to the action o~ a small diameter roller portion 1~8459~
adjacent to the tube mounting region and a large diameter roller portion adjacent to the tube pumping region. When unloading the tube from the pump, a lifter arm extending from a movable cover lifts the tube out of the tube pumping region as the cover is moved away from the pump.
Summary of the Invention It has been discovered that a removable, flexible tube can be self-loaded into the pumping region of a peristaltic pump between a rotor roller and a race by providing a radially extending rotor tab outside of the pumping region to displace the flexible tube toward the pumping region as the rotor rotates.
According to the present invention there is provided a self-loading peristaltic pump comprising: a rotor rotatably mounted about a rotor axis, and a race having an internal surface for supporting a flexible tube in a pumping region between the rotor and the race, the surface including points that are at equal radii from the rotor axis in planes that are perpendicular to the rotor axis, the rotor including at least one roller for intermittently and progressively compressing the flexible tube against the race in the pumping region, each the roller comprising a large diameter roller portion adjacent to a smaller diameter roller portion, the shape of each the roller causing the flexible tube to be self-aligning at the large diameter portion, the rotor including a radially extending rotor tab located outside of the pumping region for displacing the flexible tube toward the pumping region so as to be engaged by the smaller diameter portion as the rotor rotates, the smaller diameter portion being located closer to the radially extending tab than the large diameter portion~
~Z84598 2a The present invention also provides a self-loading pump comprising: a rotor rotatably mounted about a rotor axis, a race having an internal surface for supporting a flexible tube in a pumping region between the motor and the race, the surface including points that are at equal radii from the rotor axis in planes that are perpendicular to the rotor axis, the rotor including at least one roller for intermittently and progressively compressing the flexible tube against the race in the pumping region, the rotor including a radially extending rotor tab located outside of the pumping region for displacing the flexible tube toward the pumping region as the rotor rotates, and a linear actuator for moving the flexible tube in a direction parallel to the rotor axis, whereby the rotor tab engages the tube as the linear actuator moves the tube toward the pumping region to load the tube, and the rotor tab also engages the tube as the linear actuator moves the tube away from the pumping region to assist in moving the tube away from the pumping region to unload the tube, the flexible tube being supported within and extending from a cartridge, the linear actuator including a motor that drives a carriage for releasably engaging the cartridge.
According to a further feature of the present invention there is provided a method of loading a flexible tube into a peristaltic pump, the pump having a rotating rotor and a race having an internal surface for supporting the tube in a pumping region between the rotor and the race, comprising: forming the flexible tube into a U-shaped loop parallel to the plane of rotation of the rotor by providing the tube on a cartridge, moving the tube loop toward the pumping region by a linear actuator B
~28~5g8 2b including a motor that drives a carriage that releasably engages the cartridge, providing a projecting tab on the rotor, engaging the tube loop with the tab, and displacing the tube loop toward the pumping region by the tab as the loop is moved toward the pumping region by the linear actuator.
Additionally the present invention provides a method of unloading a U-shaped flexible tube from a peristaltic pump, the pump having a rotating rotor and a race having an internal surface for supporting the tube in a pumping region between the rotor and the race comprising: moving the tube loop away from the pumping region by a linear actuator including a motor that drives a carriage that releasably engages a cartridge on which the tube is carried, providing a projecting tab on the rotor, engaging the tube loop with the tab, and lifting the tube loop out of the pumping region with the tab as the loop is moved away from the pumping region by the linear actuator.
B
~284S98 Other advantages and features of the invention will be apparent from the following description of a preferred embodiment thereof and from the claims.
Description of the Preferred Embodiment . .
The preferred embodiment will now be described.
Drawinqs Fig. 1 is a perspective view of a front panel of a blood separation machine includinq a rotor and race for receiving a flexible tube por~ion carried by a cartridge in order to provide a peristaltic pump according to the invention.
Fig. 2 is a perspective view of a cartridge for mounting on the Fig. 1 machine and carrying tube portions for use in a peristaltic pump according to the lS invention Fig. 3 is a bottom view of the Fig. 2 cartridge.
Fig. 4 is a bottom view of an alternative cartridge having tubes threaded in a different way than the Fig, 2 cartridge.
Fig. 5 is a perspective view showing a portion of the Fig. 4 cartridge being loaded into a tube pumping .region between a race and rotor of the Fig. 1 machine.
Fig. 6 is a partial vertical sectional view taken at 6-6 of Fig. 1 when a cartridge is mounted on the apparatus Fig. 7 is an exploded perspective view of a race and rotor of the Fig. 1 machine.
Structure Referring to Fig. 1, there is shown centrifugal blood separation machine 10, including on its front face 12 two peristaltic pump units 14, 16 and various other components for interacting with components of a disposable tubing set (not shown) mounted on it, for ~284598 example, platelet sensor 18, red blood cell return pinch valve 20, and 3-way plasma and collect pinch valves 22, 24. Pump units 14, 16 each includes a respective carriage 26, 27 for releasably engaging a respective cartridge 34, 54 (Figs. 2, 4). Associated with, and on opposite sides of, each cartridge 34, 54 are two rotors 28 and corresponding races 30 defining tube pumping reqions 32 therebetween for receiving U-~haped tube loops of the cartridges.
Referring to Fig. 2, there is shown cartridge 34, which is used with pump unit 14. Cartridge 34 includes plastic housing 36 and portions of two flexible tubes, anticoagulant tube 38 and blood inflow tube 40.
These tubes are threaded through and supported within shell 36 and include-U-shaped loops 42, 44 extending from opposite sides. Housing 36 includes four laterally extending curved guide supports 46 to which tubes 38, 44 are solvent bonded. Supports 46 maintain the tube portions between them in U-shaped loops. Housing 36 includes six slots 48, three at top wall 50 and three at bottom wall 52. In cartridge 34, one end of tube 38 extends upward from top wall 50 and is connected to a .bag of anticoagulant (not shown) and the other end extends downward for joining with blood inflow tube 40 upstream of pump unit 14. Both ends of tube 40 extend from bottom wall 52 of housing 36. Pump cartridge 54, used with pump unit 16, employs an identical housing 36, but has a different tube arrangement; platelet tube 58 and plasma tube 56 each enter housing 36 through slots in the bottom wall and pass through respective slots in the top wall of housing 36. ~oth tubes 56, 58 have the same direction of flow (top to bottom) for a given direction of rotation of rotors, even though the loops extend in opposite direction, because loop 58 overlaps ~Z84598 itself. Slots 48 include aperture 60, large enough to hold a connecting portion of a tube therein without deformation of the tube, and narrow neck 62, which leads to aperture 60 and requires deformation of the tube when the tube passes through it. Top wall 50 and bottom wall 52 of housing 36 include tabs 64, for engaging recesses on carriage 26 in lower portion 65 and recesses in movable top portion 66. Side walls 68 of housing 36 extend downward further than top and bottom walls 50, 52 and are sized to mate with the outside surfaces of base plate 70 of carriage 26 (Fig. 6), Referring to Figs. 5, 6, and 7, it is seen that rotor 28 includes cap 72 having radially extending tab 74 outside of tube pumping region 32. In Fig. 6, tab 74 is shown in phantom and rotated 90 from its true position with respect to rollers 84 (as can be seen from Fig. 7). Cap 72 also has four outwardly curved ribs 76, making cap 72 substantially dome-shaped. Carriage base 70 is connected for vertical movement to linear actuator shaft 78. Referring to Fig. 7, rotor 28 includes base 80 and a pair of pivotally mounted yokes 82 for rotatably supporting rollers 84 about shafts 86. Yokes .82 are pivotally mounted at ears 88 of base 80 via pins 90. Cap 72 is secured to ears 92 of base 80 via screws 94. Yokes 82 are spring biased radially outward via compression springs 96 and are prevented from unlimited outward travel via stop screws 98. Varia~le speed motor 100 includes motor adapter shaft 102, which passes vertically through vertical hole 108 of base 80 and has ~o a bayonet-type slot 104 for releasably engaging pin 106, which is secured to base 80 and passes through hole 108. Compression spring 110 is between cap 72 and plate 111, which rests on the top of adapter shaft 102.
Spring 110 biases base 80 upward, thereby locking pin ~_ .
~284598 106 in vertically dlrected end 114 of bayonet slot 104.
Each roller 84 has o.sOll high and 0.~80" diameter cylindrical large diameter portion 116 and 0,360" to 0.365'` high conical smaller diameter portion 118 having a 4 + 30' angle and ending at a diameter of 0.429" at its top. Tab 74 extends outward from cap 72 (which is 1.80" in diameter) by 0.100". Inner surface 120 of race 30 includes a large diameter portion 122 and a conical small diameter portion 124 having a similar shape to roller 84.
operation In operation, a disposable tubing set including cartridge 34 and cartridge 54 is mounted on machine 12, the mounting including snapping cartridge 34 onto lS carriage 27 of pump unit 14 and snapping cartridqe 54 onto carriage 26 of pump unit 16, the tabs 64 engaging respective recesses at bottom 65 and top 66 of carriages 26, 27. U-shaped tube loops 42, 44 are initially outward of tab 74 (i.e., above tab 74 in Fig. 6), linear actuator shaft 78 being raised upward in an initial preloading position. U-shaped tube loops 42, 44 are loaded into pump units 14, 16 by rotation of rotors 28 , and movement toward the face o~ machine 12 of linear actuater shaft 7~. As tube loops 42, 44, are moved toward the face of machine 12, the curved portions of the loops are guided by dome-~haped ribs 76 and eventually move into the path of travel of tabs 14 and are engaged by them and displaced toward tube pumping region 32 between the rollers and the race as shown in Fig. 5. The tube is brought into contact with conical small diameter portion 118 of roller 84, and then travels along the surface of conical portion 118 toward the larger diameter base of conical portion 118 and self-aligns at large diameter portion 116, owing to the ~84598 difference in radius o the portions of the rollers, as linear actuator continues downward to the position shown in Fig. 6. Tube loops 42, 44 maintain their aligned positions ~t lclrge ~iametQr portions 116 of rollers ~.
9ecause a continuous tube is used, there are no junctions or connections to different pieces of tubing, simplifyinq manufacture and providing a smooth flow path without sharp edges for the blood and separa~ed blood components, reducing chance of damage to blood components.
To unload tube loops 42, 44, rotor 28 rotates while linear actuator 78 moves the cartridge outward from the front panel of the machine. The straight leg portions of U-shaped tube loops 42, 44 thus also tend to be pulled ou~ward, while the portions engaged by the roller tend to be maintained at the large diameter portion. Eventually each tab 74 engages a respective lower surface of tube loop 42 or 44 near the junc~ion of the straight leg portion with the portion engaged by the rollers and lifts it up outward, preventing engagement by the following roller.
Other Embodiments Other embodiments of the invention are within the scope of the following claims.
B
Field of the Invention ~he invention relates to peristaltic pumps.
~ackqround of the Invention In one type of peristaltic pump, a flexible tube is compressad between rollers that are carried by a rotor and travel along a circular path and a race that has a surface ad~acent to and concentric with the path of the rollers. As the occluded portion of the tube is advanced, the fluid in front of it is forced to travel through the tube.
A USQ of such a pump is in extracorporeal blood treatment. The peristaltic pumps have been provided on the ~ront panel of a blood processing machines, employing flexible tube portions o~ a disposable tubing set that is changed for use with a different donor~patient. Some tubing sets have included cartridges that are removably mounted on the machine and .carry flexible tubes in posi~ion to be acted upon by pump rollers on the fron~ panel of ~he machine, e.g., DeVries U.S. Patent No. 4,379,452: published European Patent Application 0,13~,436; Heath et al., U.S. Serial No. 74~,S45, i:Led June 25, l9~5; and Finsterwald et al., Canadian Application 533,243, filed March 27, 1987.
In the Finsterwald et al. '539 patent application, there is description of a pump that self-loads a 1exible tube portion placed in a tube mounting region adjacent to a tube pumping region between the race and the rollers, as the rollers rotate, owinq to the action o~ a small diameter roller portion 1~8459~
adjacent to the tube mounting region and a large diameter roller portion adjacent to the tube pumping region. When unloading the tube from the pump, a lifter arm extending from a movable cover lifts the tube out of the tube pumping region as the cover is moved away from the pump.
Summary of the Invention It has been discovered that a removable, flexible tube can be self-loaded into the pumping region of a peristaltic pump between a rotor roller and a race by providing a radially extending rotor tab outside of the pumping region to displace the flexible tube toward the pumping region as the rotor rotates.
According to the present invention there is provided a self-loading peristaltic pump comprising: a rotor rotatably mounted about a rotor axis, and a race having an internal surface for supporting a flexible tube in a pumping region between the rotor and the race, the surface including points that are at equal radii from the rotor axis in planes that are perpendicular to the rotor axis, the rotor including at least one roller for intermittently and progressively compressing the flexible tube against the race in the pumping region, each the roller comprising a large diameter roller portion adjacent to a smaller diameter roller portion, the shape of each the roller causing the flexible tube to be self-aligning at the large diameter portion, the rotor including a radially extending rotor tab located outside of the pumping region for displacing the flexible tube toward the pumping region so as to be engaged by the smaller diameter portion as the rotor rotates, the smaller diameter portion being located closer to the radially extending tab than the large diameter portion~
~Z84598 2a The present invention also provides a self-loading pump comprising: a rotor rotatably mounted about a rotor axis, a race having an internal surface for supporting a flexible tube in a pumping region between the motor and the race, the surface including points that are at equal radii from the rotor axis in planes that are perpendicular to the rotor axis, the rotor including at least one roller for intermittently and progressively compressing the flexible tube against the race in the pumping region, the rotor including a radially extending rotor tab located outside of the pumping region for displacing the flexible tube toward the pumping region as the rotor rotates, and a linear actuator for moving the flexible tube in a direction parallel to the rotor axis, whereby the rotor tab engages the tube as the linear actuator moves the tube toward the pumping region to load the tube, and the rotor tab also engages the tube as the linear actuator moves the tube away from the pumping region to assist in moving the tube away from the pumping region to unload the tube, the flexible tube being supported within and extending from a cartridge, the linear actuator including a motor that drives a carriage for releasably engaging the cartridge.
According to a further feature of the present invention there is provided a method of loading a flexible tube into a peristaltic pump, the pump having a rotating rotor and a race having an internal surface for supporting the tube in a pumping region between the rotor and the race, comprising: forming the flexible tube into a U-shaped loop parallel to the plane of rotation of the rotor by providing the tube on a cartridge, moving the tube loop toward the pumping region by a linear actuator B
~28~5g8 2b including a motor that drives a carriage that releasably engages the cartridge, providing a projecting tab on the rotor, engaging the tube loop with the tab, and displacing the tube loop toward the pumping region by the tab as the loop is moved toward the pumping region by the linear actuator.
Additionally the present invention provides a method of unloading a U-shaped flexible tube from a peristaltic pump, the pump having a rotating rotor and a race having an internal surface for supporting the tube in a pumping region between the rotor and the race comprising: moving the tube loop away from the pumping region by a linear actuator including a motor that drives a carriage that releasably engages a cartridge on which the tube is carried, providing a projecting tab on the rotor, engaging the tube loop with the tab, and lifting the tube loop out of the pumping region with the tab as the loop is moved away from the pumping region by the linear actuator.
B
~284S98 Other advantages and features of the invention will be apparent from the following description of a preferred embodiment thereof and from the claims.
Description of the Preferred Embodiment . .
The preferred embodiment will now be described.
Drawinqs Fig. 1 is a perspective view of a front panel of a blood separation machine includinq a rotor and race for receiving a flexible tube por~ion carried by a cartridge in order to provide a peristaltic pump according to the invention.
Fig. 2 is a perspective view of a cartridge for mounting on the Fig. 1 machine and carrying tube portions for use in a peristaltic pump according to the lS invention Fig. 3 is a bottom view of the Fig. 2 cartridge.
Fig. 4 is a bottom view of an alternative cartridge having tubes threaded in a different way than the Fig, 2 cartridge.
Fig. 5 is a perspective view showing a portion of the Fig. 4 cartridge being loaded into a tube pumping .region between a race and rotor of the Fig. 1 machine.
Fig. 6 is a partial vertical sectional view taken at 6-6 of Fig. 1 when a cartridge is mounted on the apparatus Fig. 7 is an exploded perspective view of a race and rotor of the Fig. 1 machine.
Structure Referring to Fig. 1, there is shown centrifugal blood separation machine 10, including on its front face 12 two peristaltic pump units 14, 16 and various other components for interacting with components of a disposable tubing set (not shown) mounted on it, for ~284598 example, platelet sensor 18, red blood cell return pinch valve 20, and 3-way plasma and collect pinch valves 22, 24. Pump units 14, 16 each includes a respective carriage 26, 27 for releasably engaging a respective cartridge 34, 54 (Figs. 2, 4). Associated with, and on opposite sides of, each cartridge 34, 54 are two rotors 28 and corresponding races 30 defining tube pumping reqions 32 therebetween for receiving U-~haped tube loops of the cartridges.
Referring to Fig. 2, there is shown cartridge 34, which is used with pump unit 14. Cartridge 34 includes plastic housing 36 and portions of two flexible tubes, anticoagulant tube 38 and blood inflow tube 40.
These tubes are threaded through and supported within shell 36 and include-U-shaped loops 42, 44 extending from opposite sides. Housing 36 includes four laterally extending curved guide supports 46 to which tubes 38, 44 are solvent bonded. Supports 46 maintain the tube portions between them in U-shaped loops. Housing 36 includes six slots 48, three at top wall 50 and three at bottom wall 52. In cartridge 34, one end of tube 38 extends upward from top wall 50 and is connected to a .bag of anticoagulant (not shown) and the other end extends downward for joining with blood inflow tube 40 upstream of pump unit 14. Both ends of tube 40 extend from bottom wall 52 of housing 36. Pump cartridge 54, used with pump unit 16, employs an identical housing 36, but has a different tube arrangement; platelet tube 58 and plasma tube 56 each enter housing 36 through slots in the bottom wall and pass through respective slots in the top wall of housing 36. ~oth tubes 56, 58 have the same direction of flow (top to bottom) for a given direction of rotation of rotors, even though the loops extend in opposite direction, because loop 58 overlaps ~Z84598 itself. Slots 48 include aperture 60, large enough to hold a connecting portion of a tube therein without deformation of the tube, and narrow neck 62, which leads to aperture 60 and requires deformation of the tube when the tube passes through it. Top wall 50 and bottom wall 52 of housing 36 include tabs 64, for engaging recesses on carriage 26 in lower portion 65 and recesses in movable top portion 66. Side walls 68 of housing 36 extend downward further than top and bottom walls 50, 52 and are sized to mate with the outside surfaces of base plate 70 of carriage 26 (Fig. 6), Referring to Figs. 5, 6, and 7, it is seen that rotor 28 includes cap 72 having radially extending tab 74 outside of tube pumping region 32. In Fig. 6, tab 74 is shown in phantom and rotated 90 from its true position with respect to rollers 84 (as can be seen from Fig. 7). Cap 72 also has four outwardly curved ribs 76, making cap 72 substantially dome-shaped. Carriage base 70 is connected for vertical movement to linear actuator shaft 78. Referring to Fig. 7, rotor 28 includes base 80 and a pair of pivotally mounted yokes 82 for rotatably supporting rollers 84 about shafts 86. Yokes .82 are pivotally mounted at ears 88 of base 80 via pins 90. Cap 72 is secured to ears 92 of base 80 via screws 94. Yokes 82 are spring biased radially outward via compression springs 96 and are prevented from unlimited outward travel via stop screws 98. Varia~le speed motor 100 includes motor adapter shaft 102, which passes vertically through vertical hole 108 of base 80 and has ~o a bayonet-type slot 104 for releasably engaging pin 106, which is secured to base 80 and passes through hole 108. Compression spring 110 is between cap 72 and plate 111, which rests on the top of adapter shaft 102.
Spring 110 biases base 80 upward, thereby locking pin ~_ .
~284598 106 in vertically dlrected end 114 of bayonet slot 104.
Each roller 84 has o.sOll high and 0.~80" diameter cylindrical large diameter portion 116 and 0,360" to 0.365'` high conical smaller diameter portion 118 having a 4 + 30' angle and ending at a diameter of 0.429" at its top. Tab 74 extends outward from cap 72 (which is 1.80" in diameter) by 0.100". Inner surface 120 of race 30 includes a large diameter portion 122 and a conical small diameter portion 124 having a similar shape to roller 84.
operation In operation, a disposable tubing set including cartridge 34 and cartridge 54 is mounted on machine 12, the mounting including snapping cartridge 34 onto lS carriage 27 of pump unit 14 and snapping cartridqe 54 onto carriage 26 of pump unit 16, the tabs 64 engaging respective recesses at bottom 65 and top 66 of carriages 26, 27. U-shaped tube loops 42, 44 are initially outward of tab 74 (i.e., above tab 74 in Fig. 6), linear actuator shaft 78 being raised upward in an initial preloading position. U-shaped tube loops 42, 44 are loaded into pump units 14, 16 by rotation of rotors 28 , and movement toward the face o~ machine 12 of linear actuater shaft 7~. As tube loops 42, 44, are moved toward the face of machine 12, the curved portions of the loops are guided by dome-~haped ribs 76 and eventually move into the path of travel of tabs 14 and are engaged by them and displaced toward tube pumping region 32 between the rollers and the race as shown in Fig. 5. The tube is brought into contact with conical small diameter portion 118 of roller 84, and then travels along the surface of conical portion 118 toward the larger diameter base of conical portion 118 and self-aligns at large diameter portion 116, owing to the ~84598 difference in radius o the portions of the rollers, as linear actuator continues downward to the position shown in Fig. 6. Tube loops 42, 44 maintain their aligned positions ~t lclrge ~iametQr portions 116 of rollers ~.
9ecause a continuous tube is used, there are no junctions or connections to different pieces of tubing, simplifyinq manufacture and providing a smooth flow path without sharp edges for the blood and separa~ed blood components, reducing chance of damage to blood components.
To unload tube loops 42, 44, rotor 28 rotates while linear actuator 78 moves the cartridge outward from the front panel of the machine. The straight leg portions of U-shaped tube loops 42, 44 thus also tend to be pulled ou~ward, while the portions engaged by the roller tend to be maintained at the large diameter portion. Eventually each tab 74 engages a respective lower surface of tube loop 42 or 44 near the junc~ion of the straight leg portion with the portion engaged by the rollers and lifts it up outward, preventing engagement by the following roller.
Other Embodiments Other embodiments of the invention are within the scope of the following claims.
B
Claims (14)
1. A self-loading peristaltic pump comprising:
a rotor rotatably mounted about a rotor axis, and a race having an internal surface for supporting a flexible tube in a pumping region between said rotor and said race, said surface including points that are at equal radii from said rotor axis in planes that are perpendicular to said rotor axis, said rotor including at least one roller for intermittently and progressively compressing said flexible tube against said race in said pumping region, each said roller comprising a large diameter roller portion adjacent to a smaller diameter roller portion, the shape of each said roller causing said flexible tube to be self-aligning at said large diameter portion, said rotor including a radially extending rotor tab located outside of said pumping region for displacing said flexible tube toward said pumping region so as to be engaged by said smaller diameter portion as said rotor rotates, said smaller diameter portion being located closer to said radially extending tab than said large diameter portion.
a rotor rotatably mounted about a rotor axis, and a race having an internal surface for supporting a flexible tube in a pumping region between said rotor and said race, said surface including points that are at equal radii from said rotor axis in planes that are perpendicular to said rotor axis, said rotor including at least one roller for intermittently and progressively compressing said flexible tube against said race in said pumping region, each said roller comprising a large diameter roller portion adjacent to a smaller diameter roller portion, the shape of each said roller causing said flexible tube to be self-aligning at said large diameter portion, said rotor including a radially extending rotor tab located outside of said pumping region for displacing said flexible tube toward said pumping region so as to be engaged by said smaller diameter portion as said rotor rotates, said smaller diameter portion being located closer to said radially extending tab than said large diameter portion.
2. The pump of claim 1 wherein said roller is rotatably mounted about a roller axis, said roller axis being parallel to said rotor axis.
3. The pump of claim 2 wherein there are a plurality of rollers, each said roller being rotatably mounted about a roller axis, each said roller axis being parallel to said rotor axis.
4. The pump of claim 1 wherein said internal race surface includes a large diameter race portion aligned with said large diameter roller portion and a smaller diameter race portion aligned with each said smaller diameter roller portion.
5. The pump of claim 1 wherein said large diameter roller portion is cylindrical and each said smaller diameter roller portion is conical.
6. The pump of claim 1 wherein said rotor is releasably mounted.
7. The pump of claim 6 further comprising a rotational actuator for rotating said rotor, said rotational actuator having a slotted shaft, said rotor lockably engaging said slotted shaft.
8. The pump of claim 7 wherein said rotational actuator is a variable speed motor.
9. A self-loading pump comprising:
a rotor rotatably mounted about a rotor axis, a race having an internal surface for supporting a flexible tube in a pumping region between said motor and said race, said surface including points that are at equal radii from said rotor axis in planes that are perpendicular to said rotor axis, said rotor including at least one roller for intermittently and progressively compressing said flexible tube against said race in said pumping region, said rotor including a radially extending rotor tab located outside of said pumping region for displacing said flexible tube toward said pumping region as said rotor rotates, and a linear actuator for moving said flexible tube in a direction parallel to said rotor axis, whereby said rotor tab engages said tube as said linear actuator moves said tube toward said pumping region to load said tube, and said rotor tab also engages said tube as said linear actuator moves said tube away from said pumping region to assist in moving said tube away from said pumping region to unload said tube, said flexible tube being supported within and extending from a cartridge, said linear actuator including a motor that drives a carriage for releasably engaging said cartridge.
a rotor rotatably mounted about a rotor axis, a race having an internal surface for supporting a flexible tube in a pumping region between said motor and said race, said surface including points that are at equal radii from said rotor axis in planes that are perpendicular to said rotor axis, said rotor including at least one roller for intermittently and progressively compressing said flexible tube against said race in said pumping region, said rotor including a radially extending rotor tab located outside of said pumping region for displacing said flexible tube toward said pumping region as said rotor rotates, and a linear actuator for moving said flexible tube in a direction parallel to said rotor axis, whereby said rotor tab engages said tube as said linear actuator moves said tube toward said pumping region to load said tube, and said rotor tab also engages said tube as said linear actuator moves said tube away from said pumping region to assist in moving said tube away from said pumping region to unload said tube, said flexible tube being supported within and extending from a cartridge, said linear actuator including a motor that drives a carriage for releasably engaging said cartridge.
10. The pump of claim 9 wherein there are two said rotors and races on opposite sides of said carriage, and there are two flexible tubes extending from said cartridge, said tubes having U-shaped portions sized for fitting in respective tube pumping regions.
11. The pump of claim 8 wherein said rotor comprises a substantially dome-shaped rotor cap for guiding said flexible tube into engagement with said rotor tab as said linear actuator moves said tube toward said pumping region.
12. A method of loading a flexible tube into a peristaltic pump, said pump having a rotating rotor and a race having an internal surface for supporting the tube in a pumping region between the rotor and the race, comprising:
forming the flexible tube into a U-shaped loop parallel to the plane of rotation of said rotor by providing the tube on a cartridge, moving said tube loop toward said pumping region by a linear actuator including a motor that drives a carriage that releasably engages said cartridge, providing a projecting tab on said rotor, engaging said tube loop with said tab, and displacing said tube loop toward said pumping region by said tab as said loop is moved toward said pumping region by said linear actuator.
forming the flexible tube into a U-shaped loop parallel to the plane of rotation of said rotor by providing the tube on a cartridge, moving said tube loop toward said pumping region by a linear actuator including a motor that drives a carriage that releasably engages said cartridge, providing a projecting tab on said rotor, engaging said tube loop with said tab, and displacing said tube loop toward said pumping region by said tab as said loop is moved toward said pumping region by said linear actuator.
13. The method of claim 12 further comprising:
providing a roller in said rotor having a large diameter roller portion adjacent to a smaller diameter roller portion, and self-aligning said tube loop at said large diameter portion.
providing a roller in said rotor having a large diameter roller portion adjacent to a smaller diameter roller portion, and self-aligning said tube loop at said large diameter portion.
14. A method of unloading a U-shaped flexible tube from a peristaltic pump, the pump having a rotating rotor and a race having an internal surface for supporting the tube in a pumping region between the rotor and the race comprising:
moving said tube loop away from said pumping region by a linear actuator including a motor that drives a carriage that releasably engages a cartridge on which said tube is carried, providing a projecting tab on said rotor, engaging said tube loop with said tab, and lifting said tube loop out of said pumping region with said tab as said loop is moved away from said pumping region by said linear actuator.
moving said tube loop away from said pumping region by a linear actuator including a motor that drives a carriage that releasably engages a cartridge on which said tube is carried, providing a projecting tab on said rotor, engaging said tube loop with said tab, and lifting said tube loop out of said pumping region with said tab as said loop is moved away from said pumping region by said linear actuator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/087,096 US4861242A (en) | 1987-08-19 | 1987-08-19 | Self-loading peristaltic pump |
| US087,096 | 1987-08-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1284598C true CA1284598C (en) | 1991-06-04 |
Family
ID=22203093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000575140A Expired - Lifetime CA1284598C (en) | 1987-08-19 | 1988-08-18 | Self-loading peristaltic pump |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4861242A (en) |
| JP (1) | JPS6468269A (en) |
| AU (1) | AU591847B2 (en) |
| CA (1) | CA1284598C (en) |
| DE (1) | DE3828123A1 (en) |
| FR (2) | FR2619603B1 (en) |
| GB (1) | GB2208897B (en) |
| IT (1) | IT1223781B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10102925B2 (en) | 2003-09-25 | 2018-10-16 | Gambro Lundia Ab | Extracorporeal blood treatment machine |
Families Citing this family (88)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4909713A (en) * | 1986-05-07 | 1990-03-20 | Cobe Laboratories, Inc. | Peristaltic pump |
| DE3827722C1 (en) * | 1988-08-16 | 1989-12-07 | Fresenius Ag, 6380 Bad Homburg, De | |
| GB8912946D0 (en) * | 1989-06-06 | 1989-07-26 | Bellhouse Techn Ltd | Peristaltic pump |
| US5147312A (en) * | 1990-06-15 | 1992-09-15 | Sherwood Medical Company | Peristaltic infusion device drip chamber yoke |
| US5133650A (en) * | 1990-06-15 | 1992-07-28 | Sherwood Medical Company | Infusion device rotor shield |
| US5181842A (en) * | 1990-06-15 | 1993-01-26 | Sherwood Medical Company | Peristaltic infusion device |
| US5057081A (en) * | 1990-06-15 | 1991-10-15 | Sherwood Medical Company | Peristaltic infusion device |
| US5158528A (en) * | 1990-06-15 | 1992-10-27 | Sherwood Medical Company | Peristaltic infusion device and charger unit |
| US5127908A (en) * | 1990-06-15 | 1992-07-07 | Sherwood Medical Company | Peristaltic infusion device |
| US5263831A (en) * | 1992-02-19 | 1993-11-23 | Cobe Laboratories, Inc. | Peristaltic pump |
| US5441636A (en) * | 1993-02-12 | 1995-08-15 | Cobe Laboratories, Inc. | Integrated blood treatment fluid module |
| US5447417A (en) * | 1993-08-31 | 1995-09-05 | Valleylab Inc. | Self-adjusting pump head and safety manifold cartridge for a peristaltic pump |
| US5397222A (en) * | 1993-11-01 | 1995-03-14 | Moss; Richard | Reusable medical cassette for ambulatory medical infusion pumps |
| US5460493A (en) | 1993-11-17 | 1995-10-24 | Baxter International Inc. | Organizer frame for holding an array of flexible tubing in alignment with one or more peristaltic pump rotors |
| US5443451A (en) * | 1993-11-17 | 1995-08-22 | Baxter International Inc. | Peristaltic pumping assembly |
| US5772409A (en) * | 1993-11-22 | 1998-06-30 | Sims Deltec, Inc. | Drug infusion device with pressure plate |
| US5482440A (en) * | 1993-12-22 | 1996-01-09 | Baxter Int | Blood processing systems using a peristaltic pump module with valve and sensing station for operating a peristaltic pump tube cassette |
| US5746708A (en) * | 1993-12-22 | 1998-05-05 | Baxter International Inc. | Peristaltic pump tube holder with pump tube shield and cover |
| US5445506A (en) * | 1993-12-22 | 1995-08-29 | Baxter International Inc. | Self loading peristaltic pump tube cassette |
| US5484239A (en) * | 1993-12-22 | 1996-01-16 | Baxter International Inc. | Peristaltic pump and valve assembly for fluid processing systems |
| US5480294A (en) * | 1993-12-22 | 1996-01-02 | Baxter International Inc. | Peristaltic pump module having jaws for gripping a peristaltic pump tube cassett |
| US5427509A (en) * | 1993-12-22 | 1995-06-27 | Baxter International Inc. | Peristaltic pump tube cassette with angle pump tube connectors |
| JPH08506984A (en) * | 1993-12-22 | 1996-07-30 | バクスター、インターナショナル、インコーポレイテッド | Self-priming drip chamber with improved visibility |
| US5387088A (en) * | 1994-01-18 | 1995-02-07 | Haemonetics Corporation | Peristaltic pump tube loading assembly |
| US5711654A (en) * | 1995-06-07 | 1998-01-27 | Baxter International Inc. | Peristaltic pump with rotor position sensing employing a reflective object sensor |
| US5846439A (en) * | 1996-02-28 | 1998-12-08 | Marshfield Medical Research & Education Foundation, A Division Of Marshfield Clinic | Method of concentrating waterborne protozoan parasites |
| GB2338752B (en) * | 1996-04-10 | 2000-07-19 | Baxter Int | Volumetric infusion pump |
| GB9607471D0 (en) * | 1996-04-10 | 1996-06-12 | Baxter Int | Volumetric infusion pump |
| US20040253129A1 (en) * | 1999-08-31 | 2004-12-16 | Sorensen Gary P. | Liquid venting surgical cassette |
| US6293926B1 (en) | 1999-11-10 | 2001-09-25 | Alcon Universal Ltd. | Peristaltic pump and cassette |
| US6962488B2 (en) * | 1999-11-10 | 2005-11-08 | Alcon, Inc. | Surgical cassette having an aspiration pressure sensor |
| US6497676B1 (en) | 2000-02-10 | 2002-12-24 | Baxter International | Method and apparatus for monitoring and controlling peritoneal dialysis therapy |
| US6500107B2 (en) * | 2001-06-05 | 2002-12-31 | Baxter International, Inc. | Method for the concentration of fluid-borne pathogens |
| US6722865B2 (en) | 2001-09-07 | 2004-04-20 | Terumorcardiovascular Systems Corporation | Universal tube clamp assembly |
| US20030125662A1 (en) | 2002-01-03 | 2003-07-03 | Tuan Bui | Method and apparatus for providing medical treatment therapy based on calculated demand |
| US6908451B2 (en) | 2002-04-25 | 2005-06-21 | Alcon, Inc. | Liquid venting surgical system |
| US7018361B2 (en) | 2002-06-14 | 2006-03-28 | Baxter International Inc. | Infusion pump |
| US7238164B2 (en) | 2002-07-19 | 2007-07-03 | Baxter International Inc. | Systems, methods and apparatuses for pumping cassette-based therapies |
| US7018182B2 (en) * | 2003-03-13 | 2006-03-28 | Chf Solutions, Inc. | Self-loading peristaltic pump for extracorporeal blood circuit |
| US6890161B2 (en) * | 2003-03-31 | 2005-05-10 | Assistive Technology Products, Inc. | Disposable fluid delivery system |
| US20080045882A1 (en) * | 2004-08-26 | 2008-02-21 | Finsterwald P M | Biological Cell Acoustic Enhancement and Stimulation |
| US20080085200A1 (en) * | 2004-09-03 | 2008-04-10 | Ismatec Sa Laboratoriumstechnik | Peristaltic Pump |
| US8398582B2 (en) * | 2005-10-27 | 2013-03-19 | Novartis Ag | Fluid pressure sensing chamber |
| US20070098579A1 (en) * | 2005-10-27 | 2007-05-03 | Alcon, Inc. | Fluid pressure sensing chamber |
| US8202243B2 (en) * | 2005-10-27 | 2012-06-19 | Novartis Ag | Fluid pressure sensing chamber |
| US7942853B2 (en) * | 2006-01-11 | 2011-05-17 | Alcon, Inc. | Fluid chamber |
| US7775780B2 (en) * | 2006-01-24 | 2010-08-17 | Alcon, Inc. | Surgical cassette |
| US8079836B2 (en) * | 2006-03-01 | 2011-12-20 | Novartis Ag | Method of operating a peristaltic pump |
| US8465467B2 (en) * | 2006-09-14 | 2013-06-18 | Novartis Ag | Method of controlling an irrigation/aspiration system |
| US8480625B2 (en) * | 2006-10-23 | 2013-07-09 | Bausch & Lamb Incorporated | Grooved aspiration pump roller-head assembly |
| US8870812B2 (en) | 2007-02-15 | 2014-10-28 | Baxter International Inc. | Dialysis system having video display with ambient light adjustment |
| US7731689B2 (en) | 2007-02-15 | 2010-06-08 | Baxter International Inc. | Dialysis system having inductive heating |
| US7998115B2 (en) | 2007-02-15 | 2011-08-16 | Baxter International Inc. | Dialysis system having optical flowrate detection |
| US8558964B2 (en) | 2007-02-15 | 2013-10-15 | Baxter International Inc. | Dialysis system having display with electromagnetic compliance (“EMC”) seal |
| US8361023B2 (en) | 2007-02-15 | 2013-01-29 | Baxter International Inc. | Dialysis system with efficient battery back-up |
| JP4909183B2 (en) * | 2007-06-01 | 2012-04-04 | 株式会社クボタ | Fender device for traveling vehicle |
| US20090053085A1 (en) * | 2007-08-24 | 2009-02-26 | Thompson Loren M | Peristalitic pump assembly and method for attaching a cassette thereto |
| US9308307B2 (en) | 2007-09-13 | 2016-04-12 | Fresenius Medical Care Holdings, Inc. | Manifold diaphragms |
| US8240636B2 (en) | 2009-01-12 | 2012-08-14 | Fresenius Medical Care Holdings, Inc. | Valve system |
| US8040493B2 (en) | 2007-10-11 | 2011-10-18 | Fresenius Medical Care Holdings, Inc. | Thermal flow meter |
| US8597505B2 (en) | 2007-09-13 | 2013-12-03 | Fresenius Medical Care Holdings, Inc. | Portable dialysis machine |
| US9358331B2 (en) | 2007-09-13 | 2016-06-07 | Fresenius Medical Care Holdings, Inc. | Portable dialysis machine with improved reservoir heating system |
| US8105487B2 (en) | 2007-09-25 | 2012-01-31 | Fresenius Medical Care Holdings, Inc. | Manifolds for use in conducting dialysis |
| US8535522B2 (en) | 2009-02-12 | 2013-09-17 | Fresenius Medical Care Holdings, Inc. | System and method for detection of disconnection in an extracorporeal blood circuit |
| CA2706919C (en) | 2007-11-29 | 2018-03-06 | Fresenius Medical Care Holdings, Inc. | System and method for conducting hemodialysis and hemofiltration |
| FR2926855A1 (en) * | 2008-01-24 | 2009-07-31 | Corneal Innovation Soc Par Act | FLUIDIC CONDUIT DEVICE AND CASSETTE FOR PERISTALTIC PUMP |
| US8272857B2 (en) | 2008-02-22 | 2012-09-25 | Medtronic Xomed, Inc. | Method and system for loading of tubing into a pumping device |
| CA2976872C (en) | 2008-10-07 | 2021-04-13 | Fresenius Medical Care Holdings, Inc. | Priming system and method for dialysis systems |
| US8105269B2 (en) | 2008-10-24 | 2012-01-31 | Baxter International Inc. | In situ tubing measurements for infusion pumps |
| CA2739807C (en) | 2008-10-30 | 2017-02-28 | Fresenius Medical Care Holdings, Inc. | Modular, portable dialysis system |
| US8137083B2 (en) | 2009-03-11 | 2012-03-20 | Baxter International Inc. | Infusion pump actuators, system and method for controlling medical fluid flowrate |
| WO2010114932A1 (en) | 2009-03-31 | 2010-10-07 | Xcorporeal, Inc. | Modular reservoir assembly for a hemodialysis and hemofiltration system |
| US9072540B2 (en) | 2009-08-12 | 2015-07-07 | Boston Scientific Limited | Adaptive tubing cassettes for use in connection with interventional catheter assemblies |
| US8388582B2 (en) | 2009-08-12 | 2013-03-05 | Medrad, Inc. | Systems and methods for operating interventional catheters using a common operating console and adaptive interface components |
| US8382447B2 (en) | 2009-12-31 | 2013-02-26 | Baxter International, Inc. | Shuttle pump with controlled geometry |
| DE102010000594B4 (en) * | 2010-03-01 | 2012-07-26 | Ulrich Gmbh & Co. Kg | peristaltic pump |
| US8567235B2 (en) | 2010-06-29 | 2013-10-29 | Baxter International Inc. | Tube measurement technique using linear actuator and pressure sensor |
| US8760637B2 (en) | 2010-08-30 | 2014-06-24 | Alcon Research, Ltd. | Optical sensing system including electronically switched optical magnification |
| EP2444669A1 (en) * | 2010-10-22 | 2012-04-25 | Nidec Servo Corporation | Tube pump |
| WO2014076519A1 (en) * | 2012-10-29 | 2014-05-22 | Debiotech S.A. | Extracorporeal blood treatment device |
| US9201036B2 (en) | 2012-12-21 | 2015-12-01 | Fresenius Medical Care Holdings, Inc. | Method and system of monitoring electrolyte levels and composition using capacitance or induction |
| US9157786B2 (en) | 2012-12-24 | 2015-10-13 | Fresenius Medical Care Holdings, Inc. | Load suspension and weighing system for a dialysis machine reservoir |
| DE102014009430A1 (en) | 2013-07-10 | 2015-01-15 | Heidelberger Druckmaschinen Ag | Peristaltic pump, pump hose and hose change process |
| US9354640B2 (en) | 2013-11-11 | 2016-05-31 | Fresenius Medical Care Holdings, Inc. | Smart actuator for valve |
| US10352315B2 (en) * | 2014-11-26 | 2019-07-16 | Fenwal, Inc. | Auto loading and unloading peristaltic pump apparatus |
| JP2019516904A (en) * | 2016-05-20 | 2019-06-20 | テルモ ビーシーティー、インコーポレーテッド | pump |
| US11179516B2 (en) | 2017-06-22 | 2021-11-23 | Baxter International Inc. | Systems and methods for incorporating patient pressure into medical fluid delivery |
| US11213460B2 (en) | 2018-09-19 | 2022-01-04 | Vesco Medical Llc | Connectors for infusion pump feeding sets |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1528964A1 (en) * | 1965-08-06 | 1969-06-19 | Bosch Gmbh Robert | Adding device for washing machines or dishwashers |
| US3841799A (en) * | 1971-08-23 | 1974-10-15 | East West Med Prod | Medical cassette pump |
| CA1036420A (en) * | 1975-09-25 | 1978-08-15 | Baxter Travenol Laboratories | Peristaltic pump with forgiving rollers |
| GB1578022A (en) * | 1976-05-05 | 1980-10-29 | Iles F | Peristaltic pumps |
| US4379452A (en) * | 1977-10-18 | 1983-04-12 | Baxter Travenol Laboratories, Inc. | Prepackaged, self-contained fluid circuit module |
| US4221543A (en) * | 1977-11-07 | 1980-09-09 | Renal Systems, Inc. | Bloom pump system |
| GB2051253B (en) * | 1979-06-15 | 1983-11-30 | Watson Marlow Ltd | Peristaltic fluid-machines |
| US4278085A (en) * | 1979-12-13 | 1981-07-14 | Baxter Travenol Laboratories, Inc. | Method and apparatus for metered infusion of fluids |
| US4392794A (en) * | 1980-12-29 | 1983-07-12 | Arthur Foxcroft | Peristaltic pump |
| IL64002A0 (en) * | 1981-10-06 | 1982-01-31 | Elmar Medical Systems Ltd | Peristaltic pumps |
| US4472116A (en) * | 1982-03-01 | 1984-09-18 | Air-Shields, Inc. | Infusion pumping apparatus |
| US4558996A (en) * | 1983-06-30 | 1985-12-17 | Organon Teknika Corporation | Easy load peristaltic pump |
| SE451541B (en) * | 1983-06-30 | 1987-10-19 | Gambro Lundia Ab | EXTRACORPORAL BLOOD TREATMENT SYSTEM |
| DE3326784C2 (en) * | 1983-07-25 | 1986-06-05 | Fresenius AG, 6380 Bad Homburg | Peristaltic roller pump |
| US4548553A (en) * | 1984-09-24 | 1985-10-22 | Ferster Reuben I | Peristaltic pump structure |
| US4586882A (en) * | 1984-12-06 | 1986-05-06 | Baxter Travenol Laboratories, Inc. | Tubing occluder pump |
| US4666598A (en) * | 1985-06-25 | 1987-05-19 | Cobe Laboratories, Inc. | Apparatus for use with fluid flow transfer device |
| US4599055A (en) * | 1985-06-25 | 1986-07-08 | Cobe Laboratories, Inc. | Peristaltic pump |
| US4606710A (en) * | 1985-10-09 | 1986-08-19 | Maguire Stephen B | Peristaltic pump |
| AU6950987A (en) * | 1986-02-27 | 1987-09-03 | Mcneilab, Inc. | Peristaltic pump |
| US4909713A (en) * | 1986-05-07 | 1990-03-20 | Cobe Laboratories, Inc. | Peristaltic pump |
-
1987
- 1987-08-19 US US07/087,096 patent/US4861242A/en not_active Expired - Lifetime
-
1988
- 1988-08-16 GB GB8819461A patent/GB2208897B/en not_active Expired - Lifetime
- 1988-08-18 AU AU21086/88A patent/AU591847B2/en not_active Ceased
- 1988-08-18 CA CA000575140A patent/CA1284598C/en not_active Expired - Lifetime
- 1988-08-18 IT IT67768/88A patent/IT1223781B/en active
- 1988-08-18 DE DE3828123A patent/DE3828123A1/en active Granted
- 1988-08-19 JP JP63206210A patent/JPS6468269A/en active Granted
- 1988-08-19 FR FR8811045A patent/FR2619603B1/en not_active Expired - Lifetime
- 1988-08-19 FR FR8811046A patent/FR2619604B1/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10102925B2 (en) | 2003-09-25 | 2018-10-16 | Gambro Lundia Ab | Extracorporeal blood treatment machine |
| US10325680B2 (en) | 2003-09-25 | 2019-06-18 | Gambro Lundia Ab | User interface for an extracorporeal blood treatment machine |
| US10796792B2 (en) | 2003-09-25 | 2020-10-06 | Gambo Lundia Ab | Extracorporeal blood treatment machine |
| US11908563B2 (en) | 2003-09-25 | 2024-02-20 | Gambro Lundia Ab | Extracorporeal blood treatment machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6468269A (en) | 1989-03-14 |
| FR2619604A1 (en) | 1989-02-24 |
| GB2208897B (en) | 1991-10-16 |
| AU2108688A (en) | 1989-02-23 |
| GB8819461D0 (en) | 1988-09-21 |
| DE3828123C2 (en) | 1993-03-18 |
| IT1223781B (en) | 1990-09-29 |
| FR2619604B1 (en) | 1993-08-20 |
| JPH0459913B2 (en) | 1992-09-24 |
| FR2619603A1 (en) | 1989-02-24 |
| FR2619603B1 (en) | 1993-02-19 |
| AU591847B2 (en) | 1989-12-14 |
| GB2208897A (en) | 1989-04-19 |
| DE3828123A1 (en) | 1989-03-02 |
| US4861242A (en) | 1989-08-29 |
| IT8867768A0 (en) | 1988-08-18 |
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| Date | Code | Title | Description |
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| MKEX | Expiry |