US3094074A - Bladder fuel pump - Google Patents

Bladder fuel pump Download PDF

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US3094074A
US3094074A US78428A US7842860A US3094074A US 3094074 A US3094074 A US 3094074A US 78428 A US78428 A US 78428A US 7842860 A US7842860 A US 7842860A US 3094074 A US3094074 A US 3094074A
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shell
cap
pumping element
open end
pouch
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US78428A
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Charles H Tuckey
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Walbro Corp
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Walbro Corp
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Assigned to HARRIS TRUST AND SAVINGS BANK, A IL BANKING CORPORATION reassignment HARRIS TRUST AND SAVINGS BANK, A IL BANKING CORPORATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WALBRO CORPORATION A CORP. OF DE
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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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/102—Disc valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M1/00—Carburettors with means for facilitating engine's starting or its idling below operational temperatures
    • 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
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • 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
    • F04B43/08—Machines, pumps, or pumping installations having flexible working members having tubular flexible members
    • F04B43/10—Pumps having fluid drive
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/43—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel
    • F02M2700/4302—Arrangements for supplying air, fuel or auxiliary fluids to a combustion space of mixture compressing engines working with liquid fuel whereby air and fuel are sucked into the mixture conduit
    • F02M2700/438—Supply of liquid to a carburettor reservoir with limitation of the liquid level; Aerating devices; Mounting of fuel filters
    • F02M2700/4388—Supply of liquid to a carburettor reservoir with limitation of the liquid level; Aerating devices; Mounting of fuel filters with fuel displacement by a pump
    • F02M2700/439—Supply of liquid to a carburettor reservoir with limitation of the liquid level; Aerating devices; Mounting of fuel filters with fuel displacement by a pump the pump being a membrane pump
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S261/00—Gas and liquid contact apparatus
    • Y10S261/68—Diaphragm-controlled inlet valve

Definitions

  • the present invention is a result of this problem and has for its object a simple design, inexpensive, and efiicient.
  • a further object of the invention is a provision of a pump housing having a fastening mechanism directly associated therewith and one which is adaptable for use with a bladder type diaphragm and also with a modified head for use with a flattypeof. diaphragm.
  • Another object is the provision of simplified valve mechanism for the pump which provides an effective valve with an extremelylow cost.
  • the invention comprises a pump to be operated from the crankcase having a bladder type pulsator and so constructed that it may be made very small and inserted directly in a fuel line or screwed into the carburetor.
  • the entire pump can be about one inch long and three-fourths of an inch in diameter.
  • FIGURE 1 a longitudinal section showing the various parts of the pump.
  • FIGURE 2 a view of the pump body in elevation showing a modified cap construction.
  • FIGURE 3 an inside view of a valve recess showing the retainer means.
  • FIGURE 1 a construction is shown wherein a cast or molded valve housing 90 is formed in a cup shape having a bottom 92 and an open lip 94 with an annular enlargement 96. In the interior of the cup is an annular recess 98 which can be used for a cylindrical filter screen when desired.
  • the cup has at one side a mounting projection 100 which is threaded at 102 so that the pump can be threaded directly into the side of an engine housing which is provided with a tapped hole.
  • a square projection 104 On the opposite side of the cup is a square projection 104 which can be used for the application of a wrench to tighten the pump into position.
  • the bottom of the cup has a small hollow projection 106 shaped on the outside to hold the end of a 3,094,074 Patented June 18, 19,63
  • the cup In the bottom of .the cup also is a recess 108 ensmalled at 110 to serve as an inlet valve chamber for the cup chamber 112.
  • the element 116 is preferably square shaped, for example, as shown in. FIGURE 3.
  • the closing cap 121 for the pump comprises a disc 123 and a hose connection nipple 125 with a central opening 126.
  • the diaphragm is composed of asac-like element 128 which in the actual size used for production is about 1 in diameter and about in length.
  • the sac-like element 128 hasa brim 130 whichextends in between the disc 123 and the lip 94.
  • the disc 123 has an axially extending annular flange 132 with an inwardly extending annular portion 134 which snaps over the enlargement 94 to lock the cap in place, squeezing the annular edge .of the brim 130 to hold it in place.
  • Disc 123 has a plurality of circumferentially distributed pips 133 which penetrate into the peripheral portion .of brim 130 so that the diaphragm 128 is securely held against the lip 94 of the cup-shaped shell 90 by the usual. snap-over arrangement created by flange .132 and annular portion 134.
  • FIGURE 2 a similar pump housing is shown with a modified head orcap portion provided with a connecting nipple 1.42.
  • This cap has an enlarged chamber PQrtion 144 which enlarges into an annular portion which receives the edges of a flat diaphragm 148.
  • the shoulder between the portions 144 and 150 are provided small pips 146 which penetrate into the rim of the diaphragm distributed circumferentially around the shoulder so that the diaphragm is securely held against the lip of the cup by the usual snap-over arrangement created by the projecting flange 152.
  • the operation of the embodiment shown in- FIG- URES land 2 is similar.
  • the pulsations of the engine crankcase in a two-cycle engine or possibly from the manifold of a four-cycle engine will cause first an enlargement of the chamber within the diaphragm 128 in FIG- URE 1 and the chamber 144 in FIGURE 2, and then an ensmalling of the respective chambers.
  • This draws fuel in through the valve disc 114 on the left-hand side of the 'diaphragms while the valve disc 122 was closed against its seat.
  • the reverse pulsation forces the liquid out of the chamber within the housing 90 past the valve disc 122 while valve disc 114 is closed against its seat.
  • the pump is easily installed in the fuel line of an engine and has the advantage that it can be used as optional equipment, depending on the requirements of the installation.
  • the device shown in FIGURE 2 is designed for a slightly larger capacity utilizing higher pressures as, for example, those which occur in the manifold of a fourcycle engine.
  • the fiat diaphragm 148 is held in place by the small projections 146 which press into the periphery of the diaphragm.
  • the larger chamber portion 144 in the cap allows this diaphragm to fluctuate in two directions.
  • the projection 104 permits a wrench to be applied to the housing to screw it into place on an internal combustion assembly either into a portion of the engine body or that of the carburetor.
  • the portion 102 of the pump can be screwed directly into the carburetor so that fuel can be discharged directly into the fuel chamber of the carburetor.
  • a pump construction which is in overall length about 1 long with a diameter of .3 7 about to 1" which can serve very effectively when interposed in a fuel line to move fuel into an internal combustion engine. It is also possible as will be seen that the diaphragms can readily be replaced if necessary by removal of the snap-on caps 121 or 140.
  • a small fuel pump adapted to be mounted in and supported by a fuel line of an internal combustion engine for remote operation and which comprises, a small elongate hollow shell open at one end, a unidirectional inlet means and outlet means in said shell spaced from the open end thereof, a cap for the open end of said shell, said cap including resilient means, having a snap-over relation thereto, and a pumping element in said shell comprising a thin walled, digital-shaped pouch of flaccid material projecting into said shell spaced from the walls thereof, the margins of said pouch being supported and confined around the edges of the open end of said shell between the shell and the cap, said pouch being otherwise unsupported in said shell, said cap having an opening to receive remote pulsations from the crank case of an engine, that improvement which comprises a radially extending surface on said cap to lie directly adjacent a similar radial surface at the end of said shell, wherein the peripheral portions of said pumping element are confined between said radial surfaces, and circumferentially spaced minute projections
  • one side of said shell has a threaded projection containing one of said unidirectional means, and a diametrically opposed outof-round polygonal projection on the other side to serve as a location for the application of torsional pressure to said shell to fasten said threaded projection to a threaded conduit.
  • a device as defined in claim 1 in which said shell is provided at said inlet means with a stepped recess and at said outlet means with a similar stepped recess; inlet and outlet passages smaller than the bores of said recess leading to the smaller bore of each stepped recess, a disc located in the smaller of each of said recesses, and a confining means in a larger recess adjacent said disc comprising an out-of-round perforated disc having spaced frictional engagement with the walls of said stepped recess to permit unidirectional flow past said discs from said passages.
  • a small fuel pump adapted to be mounted in and supported by a fuel line of an internal combustion engine for remote operation and which comprises, a small elongate hollow shell open at one end, a unidirectional inlet and outlet in said shell spaced from the open end thereof, a cap for the open end of said shell, said cap including resilient means, having a snap-over relation thereto, and a pumping element in said shell comprising a thin member of flaccid material, the margins of said member being supported and confined around the edges of the open end of said shell between the shell and the cap, said member being otherwise unsupported in said shell, said cap having an opening to receive remote pulsations from the crank case of an engine, that improvement which comprises a radially extending surface on said cap to lie directly adjacent a similar radial surface at the end of said shell, wherein the peripheral portions of said pumping element are confined between said radial surfaces, and circumferentially spaced minute projections around one of said surfaces for projecting into engagement with the peripheral portions of said pumping element to
  • a device as defined in claim 1 wherein said shell has a threaded projection, said threaded projection having a passageway therethrough, said passageway extending through said shell, one of said unidirectional means being located in said passageway, said shell further having an out-of-round polygonal projection, said out-of-round projection being adapted to facilitate fastening said threaded projection in tight relation with a portion of said fuel line.

Description

June 18, 1963 c. H. TUCKEY BLADDER FUEL PUMP Filed Dec. 27. 1960 ml m2 ATTOR/VIYJ' United States Patent 3,094,074 BLADDER FUEL PUMP Charles-H. Tuckey, Cass City, Micl1., assignor to Walbro Corporation, Cass City, Mich., a corporation of Michigan Filed Dec. 27, 1960, Ser. No. 78,428 5 Claims. (Cl. 103-44) his invention relates to a bladder fuel pump and is directed to thecreation of a small, simple fuel pump for small engines.
This application is related to a co-pending application Serial No. 766,614, filed October 10, 1958, now matured into Patent No. 2,984,188, issued May 16, 1961.
In the use of small engines for chain saws and other small appliances, frequently it is necessary to tip the engines to various angles even to the extent of complete inversion. Thus with a gas tank below the carburetor, an engine will soon stop unless means is provided to supply fuel to the carburetor. Also in the design of non-invertible engines it still may be desirable to place the fuel supply below the carburetor for design reasons relating to cost and appearance.
With cost a vital factor in the design of these engines in what is now a highly competitive industry, it has become a problem to provide a simple and elfective pump to move fuel up into a carburetor from a fuel supply.
The present invention is a result of this problem and has for its object a simple design, inexpensive, and efiicient.
A further object of the invention is a provision of a pump housing having a fastening mechanism directly associated therewith and one which is adaptable for use with a bladder type diaphragm and also with a modified head for use with a flattypeof. diaphragm.
It is a further object .to provide a pump in which the retaining cap is provided .with means to circumferentially engage a diaphragm edge to. hold it in extended position.
Another object is the provision of simplified valve mechanism for the pump which provides an effective valve with an extremelylow cost.
Briefly, the invention comprises a pump to be operated from the crankcase having a bladder type pulsator and so constructed that it may be made very small and inserted directly in a fuel line or screwed into the carburetor. The entire pump can be about one inch long and three-fourths of an inch in diameter.
Other objects and features of the invention relating to details of construction and operation will be apparent in the following description and claims.
Drawings accompany the disclosure and various views thereof may be briefly described as:
FIGURE 1, a longitudinal section showing the various parts of the pump.
FIGURE 2, a view of the pump body in elevation showing a modified cap construction.
FIGURE 3, an inside view of a valve recess showing the retainer means.
In FIGURE 1, a construction is shown wherein a cast or molded valve housing 90 is formed in a cup shape having a bottom 92 and an open lip 94 with an annular enlargement 96. In the interior of the cup is an annular recess 98 which can be used for a cylindrical filter screen when desired.
The cup has at one side a mounting projection 100 which is threaded at 102 so that the pump can be threaded directly into the side of an engine housing which is provided with a tapped hole. On the opposite side of the cup is a square projection 104 which can be used for the application of a wrench to tighten the pump into position. The bottom of the cup has a small hollow projection 106 shaped on the outside to hold the end of a 3,094,074 Patented June 18, 19,63
"ice
2 tube. In the bottom of .the cup also is a recess 108 ensmalled at 110 to serve as an inlet valve chamber for the cup chamber 112.
A small plastic valve disc 114.1ies in the recess portion 110, loosely confined by a small press fitelement 116 suitably apertured to permit flow past the valve disc when it is sucked back. The element 116 is preferably square shaped, for example, as shown in. FIGURE 3. In the fastening projection 100 is also a valve chamber 118 having anensmalled portion 120 for holding a valve disc 122 and a retainer 124. The closing cap 121 for the pump comprises a disc 123 and a hose connection nipple 125 with a central opening 126. {The diaphragm is composed of asac-like element 128 which in the actual size used for production is about 1 in diameter and about in length.
The sac-like element 128 hasa brim 130 whichextends in between the disc 123 and the lip 94. The disc 123 has an axially extending annular flange 132 with an inwardly extending annular portion 134 which snaps over the enlargement 94 to lock the cap in place, squeezing the annular edge .of the brim 130 to hold it in place. Disc 123 has a plurality of circumferentially distributed pips 133 which penetrate into the peripheral portion .of brim 130 so that the diaphragm 128 is securely held against the lip 94 of the cup-shaped shell 90 by the usual. snap-over arrangement created by flange .132 and annular portion 134.
In FIGURE 2, a similar pump housing is shown with a modified head orcap portion provided with a connecting nipple 1.42. This cap has an enlarged chamber PQrtion 144 which enlarges into an annular portion which receives the edges of a flat diaphragm 148. 0n the shoulder between the portions 144 and 150 are provided small pips 146 which penetrate into the rim of the diaphragm distributed circumferentially around the shoulder so that the diaphragm is securely held against the lip of the cup by the usual snap-over arrangement created by the projecting flange 152.
The operation of the embodiment shown in- FIG- URES land 2 is similar. The pulsations of the engine crankcase in a two-cycle engine or possibly from the manifold of a four-cycle engine will cause first an enlargement of the chamber within the diaphragm 128 in FIG- URE 1 and the chamber 144 in FIGURE 2, and then an ensmalling of the respective chambers. This draws fuel in through the valve disc 114 on the left-hand side of the 'diaphragms while the valve disc 122 was closed against its seat. The reverse pulsation forces the liquid out of the chamber within the housing 90 past the valve disc 122 while valve disc 114 is closed against its seat. The pump is easily installed in the fuel line of an engine and has the advantage that it can be used as optional equipment, depending on the requirements of the installation.
:The device shown in FIGURE 2 is designed for a slightly larger capacity utilizing higher pressures as, for example, those which occur in the manifold of a fourcycle engine. The fiat diaphragm 148 is held in place by the small projections 146 which press into the periphery of the diaphragm. The larger chamber portion 144 in the cap allows this diaphragm to fluctuate in two directions. As previously stated, the projection 104 permits a wrench to be applied to the housing to screw it into place on an internal combustion assembly either into a portion of the engine body or that of the carburetor. As shown, the portion 102 of the pump can be screwed directly into the carburetor so that fuel can be discharged directly into the fuel chamber of the carburetor.
Thus, we have disclosed a pump construction which is in overall length about 1 long with a diameter of .3 7 about to 1" which can serve very effectively when interposed in a fuel line to move fuel into an internal combustion engine. It is also possible as will be seen that the diaphragms can readily be replaced if necessary by removal of the snap-on caps 121 or 140.
I claim:
1. In a small fuel pump adapted to be mounted in and supported by a fuel line of an internal combustion engine for remote operation and which comprises, a small elongate hollow shell open at one end, a unidirectional inlet means and outlet means in said shell spaced from the open end thereof, a cap for the open end of said shell, said cap including resilient means, having a snap-over relation thereto, and a pumping element in said shell comprising a thin walled, digital-shaped pouch of flaccid material projecting into said shell spaced from the walls thereof, the margins of said pouch being supported and confined around the edges of the open end of said shell between the shell and the cap, said pouch being otherwise unsupported in said shell, said cap having an opening to receive remote pulsations from the crank case of an engine, that improvement which comprises a radially extending surface on said cap to lie directly adjacent a similar radial surface at the end of said shell, wherein the peripheral portions of said pumping element are confined between said radial surfaces, and circumferentially spaced minute projections around one of said surfaces for projecting into engagement with the peripheral portions of said pumping element to lock it between said surfaces.
2. A device as defined in claim 1 in which one side of said shell has a threaded projection containing one of said unidirectional means, and a diametrically opposed outof-round polygonal projection on the other side to serve as a location for the application of torsional pressure to said shell to fasten said threaded projection to a threaded conduit.
3. A device as defined in claim 1 in which said shell is provided at said inlet means with a stepped recess and at said outlet means with a similar stepped recess; inlet and outlet passages smaller than the bores of said recess leading to the smaller bore of each stepped recess, a disc located in the smaller of each of said recesses, and a confining means in a larger recess adjacent said disc comprising an out-of-round perforated disc having spaced frictional engagement with the walls of said stepped recess to permit unidirectional flow past said discs from said passages.
4. In a small fuel pump adapted to be mounted in and supported by a fuel line of an internal combustion engine for remote operation and which comprises, a small elongate hollow shell open at one end, a unidirectional inlet and outlet in said shell spaced from the open end thereof, a cap for the open end of said shell, said cap including resilient means, having a snap-over relation thereto, and a pumping element in said shell comprising a thin member of flaccid material, the margins of said member being supported and confined around the edges of the open end of said shell between the shell and the cap, said member being otherwise unsupported in said shell, said cap having an opening to receive remote pulsations from the crank case of an engine, that improvement which comprises a radially extending surface on said cap to lie directly adjacent a similar radial surface at the end of said shell, wherein the peripheral portions of said pumping element are confined between said radial surfaces, and circumferentially spaced minute projections around one of said surfaces for projecting into engagement with the peripheral portions of said pumping element to lock it between said surfaces.
5. A device as defined in claim 1 wherein said shell has a threaded projection, said threaded projection having a passageway therethrough, said passageway extending through said shell, one of said unidirectional means being located in said passageway, said shell further having an out-of-round polygonal projection, said out-of-round projection being adapted to facilitate fastening said threaded projection in tight relation with a portion of said fuel line.
References Cited in the file of this patent UNITED STATES PATENTS 2,556,596 Perkins et al. June 12, 1951 2,690,295 Rand Sept. 28, 1954 2,830,757 Romanotf Apr. 15, 1958 2,984,188 Tuckey et al. May 16, 1961 FOREIGN PATENTS 1,122,901 France May 28, 1956

Claims (1)

1. IN A SMALL FUEL PUMP ADAPTED TO BE MOUNTED IN AND SUPPORTED BY FUEL LINE OF AN INTERNAL COMBUSTION ENGINE FOR REMOTE OPERATION AND WHICH COMPRISES, A SMALL ELONGATE HOLLOW SHELL OPEN AT ONE END, A UNIDIRECTIONAL INLET MEANS AND OUTLET MEANS IN SAID SHELL SPACED FROM THE OPEN END THEREOF, A CAP FOR THE OPEN END OF SAID SHELL, SAID CAP INCLUDING RESILIENT MEANS, HAVING A SNAP-OVER RELATION THERETO, AND A PUMPING ELEMENT IN SAID SHELL COMPRISING A THIN WALLED, DIGITAL-SHAPED POUCH OF FLACCID MATERIAL PROJECTING INTO SAID SHELL SPACED FROM THE WALLS THEREOF, THE MARGINS OF SAID POUCH BEING SUPPORTED AND CONFINED AROUND THE EDGES OF THE OPEN END OF SAID SHELL BETWEEN THE SHELL AND THE CAP, SAID POUCH BEING OTHERWISE UNSUPPORTED IN SAID SHELL, SAID CAP HAVING AN OPENING TO RECEIVE REMOTE PULSATIONS FROM THE CRANK CASE OF AN ENGINE, THAT IMPROVEMENT WHICH COMPRISES A RADIALLY EXTENDING SURFACE ON SAID CAP TO LIE DIRECTLY ADJACENT A SIMILAR RADIAL SURFACE AT THE END OF SAID SHELL, WHEREIN THE PERIPHERAL PORTIONS OF SAID PUMPING ELEMENT ARE CONFINED BETWEEN SAID RADIAL SURFACES, AND CIRCUMFERENTIALLY SPACED MINUTE PROJECTIONS AROUND ONE OF SAID SURFACES FOR PROJECTING INTO ENGAGEMENT WITH THE PERIPHERAL PORTIONS OF SAID PUMPING ELEMENT TO LOCK IT BETWEEN SAID SURFACES.
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179055A (en) * 1962-08-31 1965-04-20 Acf Ind Inc Fuel pump
US3673369A (en) * 1970-11-25 1972-06-27 Stewart Warner Corp Diaphragm pressure switch with integral stop means for diaphragm sealing
US3711226A (en) * 1971-02-25 1973-01-16 Robertshaw Controls Co Pneumatic pump construction and method for making the same or the like
US3785251A (en) * 1971-05-13 1974-01-15 Burroughs Corp Sealing composition for pneumatic actuator
US3789176A (en) * 1971-12-27 1974-01-29 Honeywell Inc Diaphragm seal arrangement
JPS513005A (en) * 1974-06-21 1976-01-12 Iu Berunie Maaru
US4492013A (en) * 1980-02-27 1985-01-08 Hydro Rene Leduc Method for manufacturing a prestressed hydraulic accumulator
US5891505A (en) * 1996-01-23 1999-04-06 Flow International Corporation Method for pressure processing a pumpable food substance
US5993172A (en) * 1996-01-23 1999-11-30 Flow International Corporation Method and apparatus for pressure processing a pumpable substance
US6158981A (en) * 1998-06-18 2000-12-12 Flow International Corporation Method and apparatus for aseptic pressure-processing of pumpable substances
US6164930A (en) * 1998-06-18 2000-12-26 Flow International Corporation Apparatus for regulating flow of a pumped substance
US6305913B1 (en) 1999-08-13 2001-10-23 Flow International Corporation Pressure processing a pumpable substance with a flexible membrane
US20100104458A1 (en) * 2004-03-18 2010-04-29 Precision Dispensing Systems Limited pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556596A (en) * 1947-09-09 1951-06-12 Albert G Perkins Control device for milking machines
US2690295A (en) * 1951-02-23 1954-09-28 Air Mass Inc Air pump
FR1122901A (en) * 1955-04-22 1956-09-14 Improvements to diaphragm pumps
US2830757A (en) * 1955-12-29 1958-04-15 Romanoff Harold Aquarium aerating pump
US2984188A (en) * 1958-10-10 1961-05-16 Walbro Corp Bladder fuel pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2556596A (en) * 1947-09-09 1951-06-12 Albert G Perkins Control device for milking machines
US2690295A (en) * 1951-02-23 1954-09-28 Air Mass Inc Air pump
FR1122901A (en) * 1955-04-22 1956-09-14 Improvements to diaphragm pumps
US2830757A (en) * 1955-12-29 1958-04-15 Romanoff Harold Aquarium aerating pump
US2984188A (en) * 1958-10-10 1961-05-16 Walbro Corp Bladder fuel pump

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179055A (en) * 1962-08-31 1965-04-20 Acf Ind Inc Fuel pump
US3673369A (en) * 1970-11-25 1972-06-27 Stewart Warner Corp Diaphragm pressure switch with integral stop means for diaphragm sealing
US3711226A (en) * 1971-02-25 1973-01-16 Robertshaw Controls Co Pneumatic pump construction and method for making the same or the like
US3785251A (en) * 1971-05-13 1974-01-15 Burroughs Corp Sealing composition for pneumatic actuator
US3789176A (en) * 1971-12-27 1974-01-29 Honeywell Inc Diaphragm seal arrangement
JPS513005A (en) * 1974-06-21 1976-01-12 Iu Berunie Maaru
US4008008A (en) * 1974-06-21 1977-02-15 Marc Yves Vergnet Pumps
JPS5523357B2 (en) * 1974-06-21 1980-06-23
US4492013A (en) * 1980-02-27 1985-01-08 Hydro Rene Leduc Method for manufacturing a prestressed hydraulic accumulator
US5891505A (en) * 1996-01-23 1999-04-06 Flow International Corporation Method for pressure processing a pumpable food substance
US5993172A (en) * 1996-01-23 1999-11-30 Flow International Corporation Method and apparatus for pressure processing a pumpable substance
US5996478A (en) * 1996-01-23 1999-12-07 Flow International Corporation Apparatus for pressure processing a pumpable food substance
US6158981A (en) * 1998-06-18 2000-12-12 Flow International Corporation Method and apparatus for aseptic pressure-processing of pumpable substances
US6164930A (en) * 1998-06-18 2000-12-26 Flow International Corporation Apparatus for regulating flow of a pumped substance
US6305913B1 (en) 1999-08-13 2001-10-23 Flow International Corporation Pressure processing a pumpable substance with a flexible membrane
US20100104458A1 (en) * 2004-03-18 2010-04-29 Precision Dispensing Systems Limited pump
US8454324B2 (en) * 2004-03-18 2013-06-04 Precision Dispensing Systems Limited Pump
US20130243622A1 (en) * 2004-03-18 2013-09-19 Precision Dispensing Systems Limited Pump

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Owner name: HARRIS TRUST AND SAVINGS BANK, 111 WEST MONROE ST.

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Effective date: 19910325