US3135219A - Pumping apparatus - Google Patents

Pumping apparatus Download PDF

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Publication number
US3135219A
US3135219A US5935360A US3135219A US 3135219 A US3135219 A US 3135219A US 5935360 A US5935360 A US 5935360A US 3135219 A US3135219 A US 3135219A
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cylinder
plunger
chamber
pump
ball
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Expired - Lifetime
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Archie A Hays
Ruffin P Davis
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Standard Oil Co
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Standard Oil Co
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162Adaptations of cylinders
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10Valves; Arrangement of valves
    • F04B53/1002Ball valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14Pistons, piston-rods or piston-rod connections
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/7722Line condition change responsive valves
    • Y10T137/7837Direct response valves [i.e., check valve type]
    • Y10T137/7904Reciprocating valves
    • Y10T137/7908Weight biased
    • Y10T137/7909Valve body is the weight
    • Y10T137/791Ball valves
    • Y10T137/7912Separable seat

Definitions

  • An object of the present invention is a pump adapted to pump small quantities of liquid against high pressures.
  • Another object of the present invention is a small volume pump which may be operated efliciently and economically.
  • a further object of this invention is a pump which is easy to maintain and which requires a minimum of main- Further objects will become apparent from a reading of the following description of the pump of the present invention.
  • the present invention provides a pump cylinder, a reciprocating plunger within said cylinder having an intake stroke and a discharge stroke, and a particular check assembly mounted on the cylinder.
  • the check valve assembly includes an inlet conduit, an outlet conduit, and a valve chamber in flow communication with the inlet and the outlet.
  • a floating check member is positioned within the valve chamber which is in flow communication with the pump cylinder.
  • a seating surface is provided in the inlet which is adapted to receive the check mem ber in sealing contact therewith during the discharge stroke of said plunger.
  • a check-retaining washer member is positioned at the end of the valve chamber adjacent the pump cylinder, the washer member being provided with an opening therein so that the check member is retained in the valve chamber, while permitting the fluid to be pumped to pass through the opening into the pump cylinder during the intake stroke of the plunger.
  • a discharge check valve is provided in the outlet conduit to seal oif the valve chamber during the intake stroke of the plunger and prevent the return of fluid discharged from the pump into the external system.
  • FIGURE 1 is an elevational view of the pump of the present invention
  • FIGURE 1a illustrates a preferred pump cylinder employed in the pump
  • FIGURE 1b illustrates a preferred plunger employed in the pump
  • FIGURE 2 illustrates a preferred embodiment of the check valve assembly employed with the pump
  • FIGURE 3 is a preferred check-retaining washer employed in the above check valve assembly.
  • the pump 11 preferably is mounted on a base member 12 and is driven by a drive member 13 also mounted on the base.
  • the drive 13 may include an electric motor with a speed reducer and a mechanical linkage to a rack and pinion assembly coupled to the pump plunger 14.
  • Other types of drive mechanisms may be employed, however, to impart a reciprocating motion to the plunger 14 within the pump cylinder 16.
  • the coupling 17 is adjustable and a lock nut is provided so that the length of the plunger stroke may be adjusted over a wide range and set at the desired position.
  • a check valve assembly 18 is connected to the outboard end of the cylinder 16 by threaded engagement therewith. However, flanges or other suitable connections may be employed.
  • the check valve assembly 18 is provided with an inlet line 19 through which is supplied the fluid to be pumped, and a discharge line 21 through which the fluid discharged from the pump flows into an external system.
  • the check valve assembly 18 is screwed onto the outboard end 15 of the pump cylinder 16.
  • the joint between the valve block 26 and the cylinder 16 preferably is sealed by an O-ring 27 between the outboard end of the cylinder and a shoulder 28 provided in the valve block 26.
  • the valve block 26 is provided with an inlet conduit 29 through the outboard end of the valve block and substantially in alignment with the bore of the cylinder 16.
  • An outlet conduit 31, usually of smaller size than the inlet conduit, is also provided in the valve block 26 and, preferably, is at a substantially right angle to the inlet conduit 29.
  • the inlet 29 and the outlet 31 are in flow communication with a valve chamber 32 within which is positioned a check member 33.
  • the check member 33 may be cone shaped or of another shape particularly well adapted for use with specific fluids, but preferably is a ball having a diameter slightly less than the diameter of the valve chamber 32.
  • a washer member 34 which acts to retain the check member 33 Within the valve chamber 32.
  • the washer member 34 As shown in FIGURE 3, is provided with a noncircular opening 35, which advantageously is substantially rectangular in shape.
  • the opening has appropriate dimensions so that the check member 33 will not pass through the opening into the bore of the cylinder 16, while permitting a small volume of the incoming fluid to pass around the check and through the opening into the bore of the cylinder 16.
  • This arrangement permits a volume of fluid equal to the quantity to be pumped to bleed into the cylinder bore and has been found to considerably reduce shock and pulsation during the operation of the pump.
  • the check member 33 is forced against a seating surface 36 provided in the inlet 29 and contacts this seating surface to seal the inlet from the high pressure fluid.
  • An additional check valve may be employed in the suction conduit upstream of the pump if desired, but this is not generally required.
  • the fluid being pumped passes from the cylinder bore into the valve chamber, through the outlet 31 and through a check valve member 37 provided in the discharge conduit 31.
  • the check valve member 37 permits fluid to be discharged from the pump during the discharge stroke and seals off the valve chamber 32 from the external system during the intake stroke of the plunger.
  • check-retaining washer 34 is positioned in a recess 38 provided adjacent the inboard end of the valve chamber 32 and is held in place between the outboard end of the cylinder 16 and the shoulder 28.
  • the materials used in the construction of the various parts of the apparatus as described above may be any suitable material which is compatible with the fluid to be pumped under the service conditions employed.
  • the pump cylinder 16, the plunger 14, and the valve block 26 will be steel or a corrosion resistant alloy, and
  • the check member 33 and the washer 34 are made from a material having the desired corrosion resistance and hardness. Furthermore, the seating surface 36 in the block 26 and the seating surface on the washer 34 may be provided with a suitable soft seat, such as tetrafluoro-' ethylene or the like.
  • a pump such as described above has been tested and operated successfully over long periods of time, pumping small Volumes of liquid against a high pressure with minimum variations in the flow rate.
  • One such pump was constructed as shown in FIGURE 2.
  • This pump had a 7 /2" long by /4" diameter AISI 4140 steel plunger operating in an 18-8 chrome-nickel stainless steel cylinder through a Teflon packed packing gland.
  • the valve block of 18-8 chrome-nickel stainless steel was provided with a A" IPS inlet, reduced to a diameter bore in the block, and a /8" IPS outlet reduced to a A" diameter bore in the block.
  • a 4" diameter ball was used in the valve chamber which was /2" deep by 0.26 diameter.
  • the washer 34 was diameter by thick, provided with a 7 square hole in its center.
  • a spring loaded ball check valve was employed in the discharge conduit.
  • the above-described pump handled heavy catalytic cycle oil at a consistent flow rate of about 37 ml. per hour and was pumped into an external system against about 1,000 p.s.i.g.
  • the pump of the present invention has been found to be capable of pumping small quantities of fluid against high pressures and has overcome the difficulties encountered with previous apparatus.
  • Fluid pumping apparatus comprising a pump cylinder, a reciprocating plunger within said cylinder and a valve assembly mounted on the outboard end of said cylinder, said valve assembly comprising an inlet conduit, an outlet conduit, a valve chamber communicating with said inlet conduit and said outlet conduit, a ball member positioned in said chamber, said chamber communicating with the outboard end of said cylinder, a ball-retaining washer member positioned between said ball and said cylinder, a first seating surface in said inlet conduit adapted to receive said ball member in sealing contact therewith during the discharge stroke of said plunger, said washer member being provided with a non-circular opening therein, said opening being adapted to retain said ball member in said chamber while permitting fluid from said chamber to pass through said opening into said cylinder during the intake stroke of said plunger, and ball check valve means in said outlet conduit adapted to seal off said valve chamber from fluid discharged therefrom during the intake stroke of said plunger.
  • Apparatus adapted for pumping small quantities of liquid at high pressure which apparatus comprises a pump cylinder, a reciprocating plunger within said cylinder and a valve assembly threaded on the outboard end of said cylinder, said valve assembly comprising a block member adapted for threaded engagement with the outboard end of said cylinder, a first conduit at the outboard end of said block being in substantial alignment with said cylinder, a second conduit in said block of a smaller size than said first conduit positioned in said block at substantially a right angle to said first conduit, a valve chamber in said block communicating with said first conduit and said second conduit, a ball member positioned in said chamber, said chamber communicating with said cylinder, at ball-retaining Washer member positioned in a recess provided in said block adjacent the end of said chamber communicating with said cylinder, a first seating surface in said first conduit adapted to receive said ball member in sealing contact therewith during the discharge stroke of said plunger, said washer member being provided with a rectangular opening therein, said opening being adapted to retain said ball member in said chamber

Description

June 2, 1964 A. A. HAYS ETAL 3,135,219
PUMPING APPARATUS Filed Sept. 29, 1960 Fig. 1
2/ PUMP Fig. 1a
' Fig. 3
F 2 I 34 .h gg w 35 "Ii".
l8 I 27/ 1 34 i ,6
2.9 F INVENTOR.
Archie A. Hays BY Ruff/n R Davis 3 1 yfivf/w ATTORNEY tenance.
United States Patent 3,135,219 PUMPING APPARATUS Archie A. Hays, Dickinson, and Rufiin .1. Davis, League City, Tern, assignors, by mesne assignments, toStandard Gil Company, Chicago, TIL, a corporation of Indiana Filed Sept. '29, 1960, Ser. No. 59,353 2 Claims. (Cl. 103-153) This invention relates to reciprocating type pumps and a check valve assembly used therewith. More particularly, this invention relates to such a pump for handling relatively small quantities of liquid at high pressures.
In many petroleum and chemical processing plants it is often desirable to pump small quantities of liquid, i.e. about to 150 ml. of liquid per hour, into high pressure systems, i.e. as high as about 3,000 p.s.i.g. Many available pumps are not capable of being operated effectively and economically under these conditions.
An object of the present invention is a pump adapted to pump small quantities of liquid against high pressures. Another object of the present invention is a small volume pump which may be operated efliciently and economically. A further object of this invention is a pump which is easy to maintain and which requires a minimum of main- Further objects will become apparent from a reading of the following description of the pump of the present invention.
The present invention provides a pump cylinder, a reciprocating plunger within said cylinder having an intake stroke and a discharge stroke, and a particular check assembly mounted on the cylinder. The check valve assembly includes an inlet conduit, an outlet conduit, and a valve chamber in flow communication with the inlet and the outlet. A floating check member is positioned within the valve chamber which is in flow communication with the pump cylinder. A seating surface is provided in the inlet which is adapted to receive the check mem ber in sealing contact therewith during the discharge stroke of said plunger. .A check-retaining washer member is positioned at the end of the valve chamber adjacent the pump cylinder, the washer member being provided with an opening therein so that the check member is retained in the valve chamber, while permitting the fluid to be pumped to pass through the opening into the pump cylinder during the intake stroke of the plunger. A discharge check valve is provided in the outlet conduit to seal oif the valve chamber during the intake stroke of the plunger and prevent the return of fluid discharged from the pump into the external system.
A better understanding of our invention will be had from the following description of a preferred embodiment of the invention and from the accompanying drawings wherein:
FIGURE 1 is an elevational view of the pump of the present invention,
FIGURE 1a illustrates a preferred pump cylinder employed in the pump,
FIGURE 1b illustrates a preferred plunger employed in the pump,
FIGURE 2 illustrates a preferred embodiment of the check valve assembly employed with the pump, and
FIGURE 3 is a preferred check-retaining washer employed in the above check valve assembly.
Referring to FIGURE 1, the pump 11 preferably is mounted on a base member 12 and is driven by a drive member 13 also mounted on the base. The drive 13 may include an electric motor with a speed reducer and a mechanical linkage to a rack and pinion assembly coupled to the pump plunger 14. Other types of drive mechanisms may be employed, however, to impart a reciprocating motion to the plunger 14 within the pump cylinder 16. Advantageously, the coupling 17 is adjustable and a lock nut is provided so that the length of the plunger stroke may be adjusted over a wide range and set at the desired position.
A check valve assembly 18 is connected to the outboard end of the cylinder 16 by threaded engagement therewith. However, flanges or other suitable connections may be employed. The check valve assembly 18 is provided with an inlet line 19 through which is supplied the fluid to be pumped, and a discharge line 21 through which the fluid discharged from the pump flows into an external system.
Referring to FIGURE 2, the check valve assembly 18 is screwed onto the outboard end 15 of the pump cylinder 16. The joint between the valve block 26 and the cylinder 16 preferably is sealed by an O-ring 27 between the outboard end of the cylinder and a shoulder 28 provided in the valve block 26. The valve block 26 is provided with an inlet conduit 29 through the outboard end of the valve block and substantially in alignment with the bore of the cylinder 16. An outlet conduit 31, usually of smaller size than the inlet conduit, is also provided in the valve block 26 and, preferably, is at a substantially right angle to the inlet conduit 29. The inlet 29 and the outlet 31 are in flow communication with a valve chamber 32 within which is positioned a check member 33. The check member 33 may be cone shaped or of another shape particularly well adapted for use with specific fluids, but preferably is a ball having a diameter slightly less than the diameter of the valve chamber 32. At the inboard end of the valve chamber 32 there is placed a washer member 34 which acts to retain the check member 33 Within the valve chamber 32.
During the intake stroke of the plunger 14 the fluid to be pumped passes through the inlet 29 into the valve chamber 32 and the floating check member 33 is drawn against the retaining washer 34. The washer member 34, as shown in FIGURE 3, is provided with a noncircular opening 35, which advantageously is substantially rectangular in shape. The opening has appropriate dimensions so that the check member 33 will not pass through the opening into the bore of the cylinder 16, while permitting a small volume of the incoming fluid to pass around the check and through the opening into the bore of the cylinder 16. This arrangement permits a volume of fluid equal to the quantity to be pumped to bleed into the cylinder bore and has been found to considerably reduce shock and pulsation during the operation of the pump.
As the plunger 14 moves in the outboard direction on the discharge stroke, the check member 33 is forced against a seating surface 36 provided in the inlet 29 and contacts this seating surface to seal the inlet from the high pressure fluid. An additional check valve may be employed in the suction conduit upstream of the pump if desired, but this is not generally required. The fluid being pumped passes from the cylinder bore into the valve chamber, through the outlet 31 and through a check valve member 37 provided in the discharge conduit 31. The check valve member 37 permits fluid to be discharged from the pump during the discharge stroke and seals off the valve chamber 32 from the external system during the intake stroke of the plunger.
Preferably the check-retaining washer 34 is positioned in a recess 38 provided adjacent the inboard end of the valve chamber 32 and is held in place between the outboard end of the cylinder 16 and the shoulder 28.
The materials used in the construction of the various parts of the apparatus as described above may be any suitable material which is compatible with the fluid to be pumped under the service conditions employed. Normally the pump cylinder 16, the plunger 14, and the valve block 26 will be steel or a corrosion resistant alloy, and
the check member 33 and the washer 34 are made from a material having the desired corrosion resistance and hardness. Furthermore, the seating surface 36 in the block 26 and the seating surface on the washer 34 may be provided with a suitable soft seat, such as tetrafluoro-' ethylene or the like.
A pump such as described above has been tested and operated successfully over long periods of time, pumping small Volumes of liquid against a high pressure with minimum variations in the flow rate. One such pump was constructed as shown in FIGURE 2. This pump had a 7 /2" long by /4" diameter AISI 4140 steel plunger operating in an 18-8 chrome-nickel stainless steel cylinder through a Teflon packed packing gland. The valve block of 18-8 chrome-nickel stainless steel was provided with a A" IPS inlet, reduced to a diameter bore in the block, and a /8" IPS outlet reduced to a A" diameter bore in the block. A 4" diameter ball was used in the valve chamber which was /2" deep by 0.26 diameter. The washer 34 was diameter by thick, provided with a 7 square hole in its center. A spring loaded ball check valve was employed in the discharge conduit.
The above-described pump handled heavy catalytic cycle oil at a consistent flow rate of about 37 ml. per hour and was pumped into an external system against about 1,000 p.s.i.g. Thus, the pump of the present invention has been found to be capable of pumping small quantities of fluid against high pressures and has overcome the difficulties encountered with previous apparatus.
While we have described a preferred embodiment of our invention in considerable detail, it is understood that alternative details of construction and operation will be apparent from the foregoing description to those skilled in the art.
Having described our invention, what We claim is:
1. Fluid pumping apparatus comprising a pump cylinder, a reciprocating plunger within said cylinder and a valve assembly mounted on the outboard end of said cylinder, said valve assembly comprising an inlet conduit, an outlet conduit, a valve chamber communicating with said inlet conduit and said outlet conduit, a ball member positioned in said chamber, said chamber communicating with the outboard end of said cylinder, a ball-retaining washer member positioned between said ball and said cylinder, a first seating surface in said inlet conduit adapted to receive said ball member in sealing contact therewith during the discharge stroke of said plunger, said washer member being provided with a non-circular opening therein, said opening being adapted to retain said ball member in said chamber while permitting fluid from said chamber to pass through said opening into said cylinder during the intake stroke of said plunger, and ball check valve means in said outlet conduit adapted to seal off said valve chamber from fluid discharged therefrom during the intake stroke of said plunger.
2. Apparatus adapted for pumping small quantities of liquid at high pressure which apparatus comprises a pump cylinder, a reciprocating plunger within said cylinder and a valve assembly threaded on the outboard end of said cylinder, said valve assembly comprising a block member adapted for threaded engagement with the outboard end of said cylinder, a first conduit at the outboard end of said block being in substantial alignment with said cylinder, a second conduit in said block of a smaller size than said first conduit positioned in said block at substantially a right angle to said first conduit, a valve chamber in said block communicating with said first conduit and said second conduit, a ball member positioned in said chamber, said chamber communicating with said cylinder, at ball-retaining Washer member positioned in a recess provided in said block adjacent the end of said chamber communicating with said cylinder, a first seating surface in said first conduit adapted to receive said ball member in sealing contact therewith during the discharge stroke of said plunger, said washer member being provided with a rectangular opening therein, said opening being adapted to retain said ball member in said chamber while permitting fluid from said chamber to pass around said ball through said opening into said cylinder during the intake stroke of said plunger, O-ring sealing means positioned between the outboard end of said cylinder and a shoulder provided in said block adjacent said washer means and spring loaded ball check valve means in said second conduit adapted to seal oif said valve chamber from fluid discharged therefrom during the intake stroke of said plunger.
References Cited in the file of this patent UNITED STATES PATENTS 999,608 Stucky Aug. 1, 1911 1,384,097 Schlachs July 12, 1921 1,555,718 Schroeder Sept. 29, 1925 1,715,901 countryman June 4, 1929 1,764,186 Teesdale June 17, 1930 1,901,217 Yerkes Mar. 14, 1933 2,026,058 Perry Dec. 31, 1935 2,789,510 Meynig Apr. 23, 1951 2,843,045 Mashinter July 15, 1958

Claims (1)

1. FLUID PUMPING APPARATUS COMPRISING A PUMP CYLINDER, A RECIPROCATING PLUNGER WITHIN SAID CYLINDER AND A VALVE ASSEMBLY MOUNTED ON THE OUTBOARD END OF SAID CYLINDER, SAID VALVE ASSEMBLY COMPRISING AN INLET CONDUIT, AN OUTLET CONDUIT, A VALVE CHAMBER COMMUNICATING WITH SAID INLET CONDUIT AND SAID OUTLET CONDUIT, A BALL MEMBER POSITIONED IN SAID CHAMBER, SAID CHAMBER COMMUNICATING WITH THE OUTBOARD END OF SAID CYLINDER, A BALL-RETAINING WASHER MEMBER POSITIONED BETWEEN SAID BALL AND SAID CYLINDER, A FIRST SEATING SURFACE IN SAID INLET CONDUIT ADAPTED TO RECEIVE SAID BALL MEMBER IN SEALING CONTACT THEREWITH DURING THE DISCHARGE STROKE OF SAID PLUNGER, SAID WASHER MEMBER BEING PROVIDED WITH A NON-CIRCULAR OPENING THEREIN, SAID OPENING BEING ADAPTED TO RETAIN SAID BALL MEMBER IN SAID CHAMBER WHILE PERMITTINGK FLUID FROM SAID CHAMBER TO PASS THROUGH SAID OPENING INTO SAID CYLINDER DURING THE INTAKE STROKE OF SAID PLUNGER, AND BALL CHECK VALVE MEANS IN SAID OUTLET CONDUIT ADAPTED TO SEAL OFF SAID VALVE CHAMBER FROM FLUID DISCHARGED THEREFROM DURING THE INTAKE STROKE OF SAID PLUNGER.
US5935360 1960-09-29 1960-09-29 Pumping apparatus Expired - Lifetime US3135219A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3373695A (en) * 1966-04-28 1968-03-19 Union Pump Co Reciprocating piston pump
US3801234A (en) * 1973-05-14 1974-04-02 Exxon Production Research Co Fluid end for a plunger pump
EP0877164A3 (en) * 1997-05-09 1999-08-11 Genus Corporation High-pressure reciprocating pumps

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US999608A (en) * 1910-08-11 1911-08-01 William H Mckleroy Valve.
US1384097A (en) * 1918-08-08 1921-07-12 Mccord & Company Piston-packing
US1555718A (en) * 1923-05-28 1925-09-29 Schroeder Frederick William Sparking plug
US1715901A (en) * 1927-03-14 1929-06-04 Elite Mfg Company Hydraulic jack
US1764186A (en) * 1928-06-13 1930-06-17 John B Teesdale Combined check valve and union
US1901217A (en) * 1930-02-12 1933-03-14 John A Yerkes Inserted guide and bumper for blind cages
US2026058A (en) * 1934-02-13 1935-12-31 Wightman C Perry Plunger valve for oil well pumps
US2789510A (en) * 1954-03-11 1957-04-23 Black Sivalls & Bryson Inc Liquid injector
US2843045A (en) * 1956-05-03 1958-07-15 William H Mashinter Metering pump apparatus

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US999608A (en) * 1910-08-11 1911-08-01 William H Mckleroy Valve.
US1384097A (en) * 1918-08-08 1921-07-12 Mccord & Company Piston-packing
US1555718A (en) * 1923-05-28 1925-09-29 Schroeder Frederick William Sparking plug
US1715901A (en) * 1927-03-14 1929-06-04 Elite Mfg Company Hydraulic jack
US1764186A (en) * 1928-06-13 1930-06-17 John B Teesdale Combined check valve and union
US1901217A (en) * 1930-02-12 1933-03-14 John A Yerkes Inserted guide and bumper for blind cages
US2026058A (en) * 1934-02-13 1935-12-31 Wightman C Perry Plunger valve for oil well pumps
US2789510A (en) * 1954-03-11 1957-04-23 Black Sivalls & Bryson Inc Liquid injector
US2843045A (en) * 1956-05-03 1958-07-15 William H Mashinter Metering pump apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3373695A (en) * 1966-04-28 1968-03-19 Union Pump Co Reciprocating piston pump
US3801234A (en) * 1973-05-14 1974-04-02 Exxon Production Research Co Fluid end for a plunger pump
EP0877164A3 (en) * 1997-05-09 1999-08-11 Genus Corporation High-pressure reciprocating pumps
US6171070B1 (en) 1997-05-09 2001-01-09 Hakusu Tech Co., Ltd. High-pressure reciprocating pumps

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