US20070140873A1 - Pump - Google Patents

Pump Download PDF

Info

Publication number
US20070140873A1
US20070140873A1 US10/593,174 US59317405A US2007140873A1 US 20070140873 A1 US20070140873 A1 US 20070140873A1 US 59317405 A US59317405 A US 59317405A US 2007140873 A1 US2007140873 A1 US 2007140873A1
Authority
US
United States
Prior art keywords
membrane
cavity
pump
housing
inlet
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.)
Abandoned
Application number
US10/593,174
Other languages
English (en)
Inventor
Robert Grapes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Precision Dispensing Systems Ltd
Original Assignee
Precision Dispensing Systems Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Precision Dispensing Systems Ltd filed Critical Precision Dispensing Systems Ltd
Assigned to PRECISION DISPENSING SYSTEMS LIMITED reassignment PRECISION DISPENSING SYSTEMS LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GRAPES, ROBERT DONALD
Publication of US20070140873A1 publication Critical patent/US20070140873A1/en
Priority to US12/582,665 priority Critical patent/US8454324B2/en
Abandoned legal-status Critical Current

Links

Images

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
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/067—Pumps having fluid drive the fluid being actuated directly by a piston

Definitions

  • This invention relates to a pump. More particularly the present invention relates to a membrane pump.
  • the flexible element can be in the form of a deformable tube.
  • a pump of this type is described in our international patent specifications WO 99/01687 and WO 02/18790.
  • a pneumatic pinch mechanism for a deformable tube and, in particular, the mechanism when applied to the pump.
  • the mechanism includes a piston movably located within a chamber with vent means so that at some point during a movement of the piston between the first and second positions, a pressure equalisation occurs within the chamber. Consequently, as the piston moves toward the first position a pressure increase occurs which can be used to deform the deformable tube. When the piston moves toward the second position, a negative pressure is created which can be used to return the deformable tube from its deformed configuration.
  • the pump has proved successful, but as with deformable tube pumps, the deformable tube can require regular replacement. This is generally due to the repeated closing and release of the tube leading to localised wear or fatigue in the tube, which can ultimately lead to the tube rupturing.
  • a further disadvantage with such pumps is that it is often difficult or not possible to produce a deformable tube (having the necessary characteristics of being able to deform and rebound or be returned to its non-deformed state) from a material, which is particularly suited for handling the materials intended to flow through the pump.
  • a membrane pump therefore provides an advantage that the membrane can be formed from a material, which has a wide range of applications, and indeed materials which are required in some applications, but which cannot be formed or economically formed into replaceable deformable tubes for use in pumps having cyclic deforming of the tube.
  • membrane pumps to date are of constructions, which still give rise to mechanical stress in the diaphragm, thereby requiring regular replacement of the diaphragm.
  • many known diaphragm pumps fall short in performance, especially in achievement of full removal of fluid from the pump chamber on the exhaust stroke and full uptake on the inlet stroke.
  • a pump including a cavity with an inlet port and an outlet port opening into and from the cavity, a flexible membrane located within the chamber and arranged to be bi-stable in two states corresponding to completion of inlet and exhaust of a pumping cycle.
  • the flexible membrane is mounted in the cavity with a preset whereby the membrane adopts one of the stable states.
  • the membrane is preferably formed from an elastomeric material which can be in sheet form.
  • the membrane is clamped between first and second housing sections, each section having a cavity section such that when the housing sections are assembled to form a housing, said cavity is formed.
  • the cavity is, in the preferred form, located in a housing, the cavity being connectable to a source or sources of negative and positive pressure and means to cyclically apply the positive and negative pressures to the cavity to cause the membrane to move between the stable states.
  • first and section housing sections configured to form said cavity when the housing sections are joined together, clamp the membrane about a peripheral margin thereof.
  • the first housing section can include a recess into which the membrane is located, the peripheral dimensions of the membrane being greater than those of the recess whereby compressive forces are set up in the membrane when it is installed in the recess.
  • the second housing section can include a protruding portion which engages in the recess, when the first and second housing sections are combined together, to cause the membrane to be clamped in place.
  • a third housing section coupled to the second housing section, said third housing section including means for facilitating connection of inlet and outlet conduits for pumpable material.
  • the second and third housing sections include inlet and outlet openings and means for locating therein a valve element.
  • the valve element can be a disk of flexible material.
  • the cavity is elongate and of curved cross-section, a port via which the source(s) of positive and negative pressure are connectable opens into the cavity.
  • the ends of the elongate cavity are preferably complex curved.
  • FIG. 1 is a longitudinal cross-section through the pump
  • FIG. 2 is an exploded view in cross-section of the pump as shown in FIG. 1 ,
  • FIG. 3 is a transverse cross-sectional view taken between the inlet and outlet ports but showing only two sections of the pump body
  • FIG. 4 is a perspective view of one housing section of the pump
  • FIG. 5 is a schematic view of the pump on an exhaust cycle
  • FIG. 6 is a view similar to FIG. 5 but of the inlet cycle
  • FIG. 7 is a cross-sectional view of a second embodiment which incorporates a different form of control mechanism.
  • the pump 10 is, according to a preferred embodiment, formed of two housing sections 11 and 12 . When these are assembled together they define an internal pump cavity 13 . Clamped between the housing sections 11 and 12 , as will hereinafter be described, is a membrane 14 which is made from a suitable flexible material.
  • the cavity 13 is elongate and, as shown in FIG. 4 , each end 15 is complex curved. In cross-section as shown in FIG. 1 , each end is also curved as indicated at 15 . Furthermore, in transverse cross-section as shown in FIG. 3 , the cavity 13 is also of curved cross-section.
  • Housing section 11 incorporates a rebate 16 , which effectively results in an upstand or projecting portion 17 .
  • the cavity section 13 a is effectively located, at least in part, in the resultant upstanding portion 17 .
  • the other housing section 12 has a recessed portion 18 with cavity section 13 b extending away from the floor of the recess 18 .
  • the projecting portion 17 engages snugly within recess 18 .
  • the arrangement is such that surface 20 of projecting portion 17 , terminates a distance from the floor 19 of recess 18 .
  • this distance D (see FIG. 1 ) is less than the thickness of the membrane 14 . The reason for this gap D will hereinafter become apparent.
  • the membrane 14 is, in the preferred form of the invention, cut from sheet material.
  • the material is elastomeric and of a type which is compatible with the material, that is intended to be pumped through the pump 10 .
  • the membrane material is selected such as to be able to withstand the corrosive nature of the fluid.
  • the membrane is selected from a food grade material in the event that the pump is to handle a liquid foodstuff.
  • the membrane 14 is cut in a shape and to a size, which enables it to be snugly fitted into the recess 18 .
  • the overall peripheral dimensions of the membrane 14 are greater than the peripheral dimensions of the sidewall 21 of the recess 18 .
  • the membrane 14 when the housing section 11 is combined with housing section 12 (the membrane 14 being in place in recess 18 ) the fact that distance D is less than the thickness of the membrane 14 causes the peripheral edge margin portion of the membrane 14 to be sandwiched and clamped between opposing surfaces 19 and 20 .
  • This clamping force provides yet further compressive forces in the membrane, which causes the membrane to even more closely adapt into the shape of the cavity section 13 b.
  • the membrane 14 is in contact with, or located closely adjacent to the overall surface of the cavity section 13 b.
  • a port 22 is formed in the housing section 12 and opens into the cavity section 13 b .
  • This port 22 can be offset toward one end of the cavity 13 , as shown in the drawings, or else it can be located midway in the length of the cavity 13 .
  • a narrow groove 22 a can be formed in the wall surface of the cavity section 13 b and extend along the length of the cavity 13 either side of from the port 22 . Also a similar narrow groove (not shown) can be formed in cavity 13 b .
  • the effect of the narrow groove(s) is to prevent the pump from “choking” when the membrane approaches contact with the surface of the cavity. Such contact could prevent fluid flow from occurring and thereby result in the cavity not fully filling or exhausting.
  • the narrow groove ensures that flow occurs right down to when the membrane comes into full overall contact with the cavity surface.
  • a port which opens from the cavity 13 to the outer surface 23 of housing section 11 .
  • Port 24 functions as an inlet port while port 25 functions as an outlet or exhaust port.
  • Each of inlet ports 24 and exhaust port 25 can, as shown, be made up by a plurality of separate passages 24 a and 25 a respectively.
  • a recess 26 is formed in the surface 23 of housing section 11 and into this is engaged a disk of flexible material which forms valve element 27 .
  • a valve element 28 in the form of a disk of flexible material is provided in the exhaust valve 25 but it locates in a recess 29 in cover 30 .
  • Cover 30 has connecting pieces 31 and 32 (e.g. in the form of annular walls or turrets) which respectively provide connections for an inlet line (not shown) to inlet valve 24 and an outlet or exhaust line (also not shown) from exhaust valve 25 .
  • connecting pieces 31 and 32 e.g. in the form of annular walls or turrets
  • the membrane 14 is bi-stable.
  • One stable position of the membrane 14 is shown in full detail in FIG. 1 while the other stable position is shown in dotted detail.
  • the membrane 14 in the first stable position the membrane 14 is in the cavity section 13 b and when in the second stable position the membrane 14 is located in the cavity section 13 a .
  • the membrane 14 adopts a stable position in either a position which conforms with completion of intake of fluid through inlet valve 24 (i.e. the position shown in the drawings) and a full or completed exhaust position.
  • the membrane 14 is moved between its two stable positions by application of negative P 1 and positive P 2 pressures applied to the cavity 13 b through port 22 . Consequently with the pump in the configuration shown in FIG. 1 and inlet and outlet conduits or lines attached to connectors 31 and 32 a positive pressure P 2 (see FIG. 5 ) applied through port 22 will force the membrane 14 into an opposite stable position.
  • a positive pressure P 2 (see FIG. 5 ) applied through port 22 will force the membrane 14 into an opposite stable position.
  • the inlet valve 24 is forced closed while the outlet valve 25 is forced open and any fluid within the cavity 13 i.e. to that side of the membrane opposite to that which faces port 22 , is exhausted through the outlet valve 25 .
  • a negative pressure P 1 applied via port 22 causes the membrane 14 to return to the position shown in FIG. 1 which also causes the exhaust valve 25 to close but the inlet valve 24 to open and enable fluid in the inlet line to be drawn into cavity 13 .
  • the cavity 13 thus fills with the fluid ready to be exhausted through the outlet valve 25 upon the next cycle occurring when membrane 14 moves back into cavity section 13 a under positive pressure P 2 .
  • the means for applying negative and positive pressures can take on many forms as will be apparent to the person skilled in the art.
  • the means could comprise, for example, sources of positive and negative pressure, which via suitable valves can be coupled to the port 22 .
  • FIGS. 1 and 7 Examples of mechanisms we have developed for applying the positive and negative pressures via port 22 are shown in FIGS. 1 and 7 .
  • FIG. 1 there is a pneumatic operator 33 that has a body 34 which defines a chamber 35 in which a piston 36 is reciprocally mounted.
  • a piston rod 37 is pivotally connected via pivot 38 to the piston 36 .
  • This piston rod 37 is pivotally connected by pivot 39 at its other end to a rotating drive member 40 .
  • the drive member 40 is connected to a drive means (not shown) which can be in the form of an electric motor or some other form of motive power.
  • a port 41 in the end wall 42 of the body 34 is in communication with port 22 .
  • the body 34 is in close proximity to the pump 10 but it will be appreciated by those skilled in the art that the pneumatic operator 33 could be located quite some distance away from the pump 10 and connected by a conduit extending between ports 22 and 41 .
  • a recess 43 is formed in the inside surface of the side wall 34 a of body 34 .
  • the recess is located adjacent the end of wall 42 .
  • a port 43 a which opens to atmosphere.
  • the port 43 a is shown in one preferred position where it is adjacent the inner end of the piston 36 when the piston is at its full stroke away from end wall 42 of body 34 .
  • the chamber 35 is fully vented to atmosphere.
  • the position of port 43 a can be varied dependent on use requirements that may require venting before the full stroke of piston 36 has been completed.
  • FIG. 7 An alternative arrangement is shown in FIG. 7 .
  • a port 43 ′ in the wall 34 a is connected to a conduit 44 which is, in turn, connected to a vent housing 45 .
  • One wall of the vent housing 45 has a vent opening 49 which opens into a chamber 50 in which a pin 51 is moveably located. The pin 51 is therefore moveable between the position where conduit 44 is isolated from vent 49 to a position where the vent 49 is connected to conduit 44 .
  • a pair of curved or shaped (e.g. ramped) projections 52 and 53 Mounted with a periphery of the driving member 40 and projecting there from is a pair of curved or shaped (e.g. ramped) projections 52 and 53 . Consequently, as the rotating member 40 rotates, a projection 52 or 53 comes into contact pin 51 which forces the pin 51 inwardly (relative to the housing) thereby connecting or disconnecting the vent 49 from the conduit 44 .
  • the pin 51 is biased by suitable biasing means (not shown) such as a spring or the like into a position where the vent 49 is closed i.e. isolated from conduit 44 .
  • vent port 49 will still be closed. This will continue to be the situation until the engagement projection 52 comes into contact with pin 51 to effectively open the vent port 49 . As a result, the vent port 49 once again vents the chamber 35 to atmosphere. After the vent 49 is closed from conduit 44 by movement of the pin 51 and as a result of the pin clearing the projection 52 , the continued movement of the piston 36 back to its first position will create a negative pressure.
  • the point and the movement of the piston 36 where contact between the pin 51 and projections 53 respectively occurs is adjustable.
  • projections 52 and 53 can be adjustable in position on the periphery of the driving member or rotor 40 so that, for example, the period during which the piston creates a positive pressure could be less. This would result in the time that the membrane is under negative pressure to be greater than the period that it is under positive pressure.
  • the bi-stable flexible membrane 14 effectively has a small amount of travel between its two states. It is not mechanically connected to any drive thereby giving the membrane free movement in the cavity 13 .
  • the cavity shape is round rectangular and its contoured to fit the bi-stable shape of the membrane. Consequently, the cavity supports the diaphragm over its full surface when the diaphragm is in a so-called stable state.
  • the membrane is therefore subject to uniform pressure not only when in the stable states but during the transition between the states as it is supported on both surfaces by the incoming or outgoing pumpable medium and the positive or negative pressure applied across the whole membrane surface via port 22 .
  • the pump therefore provides maximum efficiency and good linear flow characteristics, the latter being more critical as viscosity of the pumpable medium increases.
  • the outlet pressure will be governed by the drive pressure therefore no need for pressure limiting.
  • Suction (lift) is governed by the negative pressure. There is thus consistent through put over a wide range of drive pressures.
  • valves 24 and 25 are located at the half round extremities of the cavity and in close proximity to the cavity. This proximity of the valves to the cavity thus minimises voids thereby giving optimum dry prime and compression ratio.
  • the pump arrangement is such that only low inertia needs to be overcome in order to drive the membrane.
  • the valves are progressively closed and finally close before full exhaust or intake. This means that the last thing to occur as the membrane 14 reaches its stable position is movement of the valves into a closed position or opening is the first thing to occur upon the membrane 14 moving from a stable position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US10/593,174 2004-03-18 2005-03-18 Pump Abandoned US20070140873A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/582,665 US8454324B2 (en) 2004-03-18 2009-10-20 Pump

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NZ531822A NZ531822A (en) 2004-03-18 2004-03-18 A membrane pump
NZ531822 2004-03-18
PCT/NZ2005/000046 WO2005088128A1 (fr) 2004-03-18 2005-03-18 Pompe a membrane

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ2005/000046 A-371-Of-International WO2005088128A1 (fr) 2004-03-18 2005-03-18 Pompe a membrane

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/582,665 Continuation-In-Part US8454324B2 (en) 2004-03-18 2009-10-20 Pump

Publications (1)

Publication Number Publication Date
US20070140873A1 true US20070140873A1 (en) 2007-06-21

Family

ID=34975651

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/593,174 Abandoned US20070140873A1 (en) 2004-03-18 2005-03-18 Pump

Country Status (6)

Country Link
US (1) US20070140873A1 (fr)
EP (1) EP1730403B1 (fr)
AU (1) AU2005220568B2 (fr)
CA (1) CA2557253A1 (fr)
NZ (1) NZ531822A (fr)
WO (1) WO2005088128A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015073599A1 (fr) * 2013-11-15 2015-05-21 Ivenix, Inc. Chambre de pompe comprenant des modifications de surface interne
JP2019063439A (ja) * 2017-10-05 2019-04-25 ニプロ株式会社 圧力測定用チャンバ
US10578098B2 (en) 2005-07-13 2020-03-03 Baxter International Inc. Medical fluid delivery device actuated via motive fluid
US11478578B2 (en) 2012-06-08 2022-10-25 Fresenius Medical Care Holdings, Inc. Medical fluid cassettes and related systems and methods
US20230400019A1 (en) * 2006-04-14 2023-12-14 Deka Products Limited Partnership Fluid pumping systems, devices and methods
US12044228B2 (en) 2007-02-27 2024-07-23 Deka Products Limited Partnership Cassette system integrated apparatus
US12078162B2 (en) 2018-03-30 2024-09-03 Deka Products Limited Partnership Liquid pumping cassettes and associated pressure distribution manifold and related methods

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8833605B2 (en) 2010-07-20 2014-09-16 Ecolab Usa Inc. Product delivery and monitoring system
DK201570293A1 (en) * 2015-05-19 2016-12-12 Nel Hydrogen As Diaphragm compressor with an oblong shaped chamber
TWI666384B (zh) 2018-06-08 2019-07-21 科際精密股份有限公司 隔膜泵及其閥片

Citations (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821930A (en) * 1953-06-12 1958-02-04 Ici Ltd Diaphragm operated delivery pumps
US3093086A (en) * 1960-04-12 1963-06-11 Westinghouse Electric Corp Diaphragm assemblage
US3101058A (en) * 1961-06-16 1963-08-20 Jr William H Carr Diaphragm pumping system
US3294031A (en) * 1965-07-28 1966-12-27 Stephen H Latawic Fluid motor system
US3338171A (en) * 1965-09-15 1967-08-29 Du Pont Pneumatically operable diaphragm pumps
US3357360A (en) * 1965-11-22 1967-12-12 Purex Corp Ltd Hydraulic pumping system
US3431823A (en) * 1965-12-16 1969-03-11 Franz Orlita Diaphragm assembly for a diaphragm pump
US3460482A (en) * 1968-01-29 1969-08-12 Purex Corp Ltd Pumping mechanisms
US3503307A (en) * 1967-03-31 1970-03-31 I V Pressure Controllers Ltd Diaphragms
US3900276A (en) * 1973-05-16 1975-08-19 Mcculloch Corp Diaphragm pump method and apparatus
US3947156A (en) * 1972-03-08 1976-03-30 Erich Becker Diaphragm pump, particularly for the generation of vacuum
US3955901A (en) * 1973-10-23 1976-05-11 Hamilton Thomas W Membrane pump
US4021164A (en) * 1974-10-16 1977-05-03 Ab Piab Pump having reciprocating pumping means
US4124008A (en) * 1975-12-05 1978-11-07 Kawasaki Jukogyo Kabushiki Kaisha Integrated fuel supply system for an internal combustion engine including filter, valve, and pump
US4430048A (en) * 1980-12-29 1984-02-07 Lewa Herbert Ott Gmbh & Co. Diaphragm pump with a diaphragm clamped in pressure-balancing arrangement
US4437823A (en) * 1979-03-13 1984-03-20 Upravlenie Sanitarno-Tekhnicheskikh Rabot Rotary machine with an axially moving partition
US4573885A (en) * 1984-04-13 1986-03-04 Bran & Lubbe Gmbh Piston diaphragm pump
US4627256A (en) * 1979-12-26 1986-12-09 Hughes Aircraft Company Method of forming precisely curved surfaces
US4634430A (en) * 1984-03-07 1987-01-06 Fresenius Ag Pump arrangement for medical purposes
US4755111A (en) * 1986-06-11 1988-07-05 Nuovopignone Industrie Meccaniche E Fonderia S.P.A. Pumping device, particularly suitable for compressing fluids on deep sea-bottoms
US4904167A (en) * 1987-02-26 1990-02-27 Karl Eickmann Membranes and neighboring members in pumps, compressors and devices
US4915017A (en) * 1987-10-26 1990-04-10 D. F. Laboratories Ltd. Diaphragm and a diaphragm-actuated fluid-transfer control device
US5002471A (en) * 1987-07-20 1991-03-26 D.F. Laboratories Ltd. Disposable cell and diaphragm pump for use of same
US5423738A (en) * 1992-03-13 1995-06-13 Robinson; Thomas C. Blood pumping and processing system
US5458468A (en) * 1988-12-29 1995-10-17 Victor Peter Chang Diaphragm pump
US5669764A (en) * 1994-10-07 1997-09-23 Bayer Corporation Pneumatic diaphragm pump
US5836750A (en) * 1997-10-09 1998-11-17 Honeywell Inc. Electrostatically actuated mesopump having a plurality of elementary cells
US6105829A (en) * 1989-03-28 2000-08-22 Millipore Investment Holdings, Ltd. Fluid dispensing system
US6132187A (en) * 1999-02-18 2000-10-17 Ericson; Paul Leonard Flex-actuated bistable dome pump
US6582206B2 (en) * 2000-03-16 2003-06-24 Lewa Herbert Ott Gmbh + Co. Diaphragm chucking with elasticity adjustment
US20030194332A1 (en) * 2002-04-12 2003-10-16 Bayer Aktiengesellschaft Diaphragm pump
US6669455B2 (en) * 2002-01-31 2003-12-30 Elmer Scott Welch Fluid-pumping system employing air-driven pump and employing at least one pulsation dampener
US6971859B2 (en) * 2003-11-28 2005-12-06 Kabushiki Kaisha Toyota Jidoshokki Diaphragm unit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3485258A (en) * 1966-04-14 1969-12-23 Greene Eng Co Bistable fluid device
WO2002018790A1 (fr) * 2000-08-28 2002-03-07 Precision Dispensing Systems Limited Mecanisme de pincement pneumatique pour tube deformable

Patent Citations (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821930A (en) * 1953-06-12 1958-02-04 Ici Ltd Diaphragm operated delivery pumps
US3093086A (en) * 1960-04-12 1963-06-11 Westinghouse Electric Corp Diaphragm assemblage
US3101058A (en) * 1961-06-16 1963-08-20 Jr William H Carr Diaphragm pumping system
US3294031A (en) * 1965-07-28 1966-12-27 Stephen H Latawic Fluid motor system
US3338171A (en) * 1965-09-15 1967-08-29 Du Pont Pneumatically operable diaphragm pumps
US3357360A (en) * 1965-11-22 1967-12-12 Purex Corp Ltd Hydraulic pumping system
US3431823A (en) * 1965-12-16 1969-03-11 Franz Orlita Diaphragm assembly for a diaphragm pump
US3503307A (en) * 1967-03-31 1970-03-31 I V Pressure Controllers Ltd Diaphragms
US3460482A (en) * 1968-01-29 1969-08-12 Purex Corp Ltd Pumping mechanisms
US3947156A (en) * 1972-03-08 1976-03-30 Erich Becker Diaphragm pump, particularly for the generation of vacuum
US3900276A (en) * 1973-05-16 1975-08-19 Mcculloch Corp Diaphragm pump method and apparatus
US3955901A (en) * 1973-10-23 1976-05-11 Hamilton Thomas W Membrane pump
US4021164A (en) * 1974-10-16 1977-05-03 Ab Piab Pump having reciprocating pumping means
US4124008A (en) * 1975-12-05 1978-11-07 Kawasaki Jukogyo Kabushiki Kaisha Integrated fuel supply system for an internal combustion engine including filter, valve, and pump
US4437823A (en) * 1979-03-13 1984-03-20 Upravlenie Sanitarno-Tekhnicheskikh Rabot Rotary machine with an axially moving partition
US4627256A (en) * 1979-12-26 1986-12-09 Hughes Aircraft Company Method of forming precisely curved surfaces
US4430048A (en) * 1980-12-29 1984-02-07 Lewa Herbert Ott Gmbh & Co. Diaphragm pump with a diaphragm clamped in pressure-balancing arrangement
US4634430A (en) * 1984-03-07 1987-01-06 Fresenius Ag Pump arrangement for medical purposes
US4573885A (en) * 1984-04-13 1986-03-04 Bran & Lubbe Gmbh Piston diaphragm pump
US4755111A (en) * 1986-06-11 1988-07-05 Nuovopignone Industrie Meccaniche E Fonderia S.P.A. Pumping device, particularly suitable for compressing fluids on deep sea-bottoms
US4904167A (en) * 1987-02-26 1990-02-27 Karl Eickmann Membranes and neighboring members in pumps, compressors and devices
US5002471A (en) * 1987-07-20 1991-03-26 D.F. Laboratories Ltd. Disposable cell and diaphragm pump for use of same
US4915017A (en) * 1987-10-26 1990-04-10 D. F. Laboratories Ltd. Diaphragm and a diaphragm-actuated fluid-transfer control device
US5458468A (en) * 1988-12-29 1995-10-17 Victor Peter Chang Diaphragm pump
US6251293B1 (en) * 1989-03-28 2001-06-26 Millipore Investment Holdings, Ltd. Fluid dispensing system having independently operated pumps
US6105829A (en) * 1989-03-28 2000-08-22 Millipore Investment Holdings, Ltd. Fluid dispensing system
US5423738A (en) * 1992-03-13 1995-06-13 Robinson; Thomas C. Blood pumping and processing system
US5902096A (en) * 1994-10-07 1999-05-11 Bayer Corporation Diaphragm pump having multiple rigid layers with inlet and outlet check valves
US5669764A (en) * 1994-10-07 1997-09-23 Bayer Corporation Pneumatic diaphragm pump
US5836750A (en) * 1997-10-09 1998-11-17 Honeywell Inc. Electrostatically actuated mesopump having a plurality of elementary cells
US6132187A (en) * 1999-02-18 2000-10-17 Ericson; Paul Leonard Flex-actuated bistable dome pump
US6582206B2 (en) * 2000-03-16 2003-06-24 Lewa Herbert Ott Gmbh + Co. Diaphragm chucking with elasticity adjustment
US6669455B2 (en) * 2002-01-31 2003-12-30 Elmer Scott Welch Fluid-pumping system employing air-driven pump and employing at least one pulsation dampener
US20030194332A1 (en) * 2002-04-12 2003-10-16 Bayer Aktiengesellschaft Diaphragm pump
US6971859B2 (en) * 2003-11-28 2005-12-06 Kabushiki Kaisha Toyota Jidoshokki Diaphragm unit

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10670005B2 (en) 2005-07-13 2020-06-02 Baxter International Inc. Diaphragm pumps and pumping systems
US11384748B2 (en) 2005-07-13 2022-07-12 Baxter International Inc. Blood treatment system having pulsatile blood intake
US10578098B2 (en) 2005-07-13 2020-03-03 Baxter International Inc. Medical fluid delivery device actuated via motive fluid
US10590924B2 (en) 2005-07-13 2020-03-17 Baxter International Inc. Medical fluid pumping system including pump and machine chassis mounting regime
US12044229B2 (en) * 2006-04-14 2024-07-23 Deka Products Limited Partnership Fluid pumping systems, devices and methods
US20230400019A1 (en) * 2006-04-14 2023-12-14 Deka Products Limited Partnership Fluid pumping systems, devices and methods
US12044228B2 (en) 2007-02-27 2024-07-23 Deka Products Limited Partnership Cassette system integrated apparatus
US11478578B2 (en) 2012-06-08 2022-10-25 Fresenius Medical Care Holdings, Inc. Medical fluid cassettes and related systems and methods
WO2015073599A1 (fr) * 2013-11-15 2015-05-21 Ivenix, Inc. Chambre de pompe comprenant des modifications de surface interne
US10156231B2 (en) 2013-11-15 2018-12-18 Ivenix, Inc. Pump chamber including internal surface modifications
EP3068461A4 (fr) * 2013-11-15 2016-11-09 Ivenix Inc Chambre de pompe comprenant des modifications de surface interne
CN105828852A (zh) * 2013-11-15 2016-08-03 艾韦尼克斯股份有限公司 包括内表面改进的泵腔室
JP2019063439A (ja) * 2017-10-05 2019-04-25 ニプロ株式会社 圧力測定用チャンバ
US12078162B2 (en) 2018-03-30 2024-09-03 Deka Products Limited Partnership Liquid pumping cassettes and associated pressure distribution manifold and related methods

Also Published As

Publication number Publication date
WO2005088128A1 (fr) 2005-09-22
AU2005220568B2 (en) 2011-01-06
AU2005220568A1 (en) 2005-09-22
EP1730403A1 (fr) 2006-12-13
EP1730403B1 (fr) 2013-12-18
NZ531822A (en) 2007-08-31
EP1730403A4 (fr) 2012-05-16
CA2557253A1 (fr) 2005-09-22

Similar Documents

Publication Publication Date Title
AU2005220568B2 (en) A membrane pump
US20130243622A1 (en) Pump
US4549467A (en) Actuator valve
GB2452139A (en) Check valve
CA2440520C (fr) Robinets anti-givrage, moteur a gaz, et pompe a membrane equipee de ces derniers
JP4943433B2 (ja) 空気バルブ、戻り止めおよびポペットバルブを有する往復ピストンポンプ
CN112196759A (zh) 脉冲水泵以及洗牙器
CN210196009U (zh) 一种无油空压机
CN106062365B (zh) 隔膜的固定构造、具备其的隔膜泵以及阀装置
US6887047B2 (en) Pneumatic pinch mechanism for a deformable tube
US20040028545A1 (en) Cylinder assembly for a mini air compressor
US4480969A (en) Fluid operated double acting diaphragm pump housing and method
US7367785B2 (en) Reduced icing valves and gas-driven motor and reciprocating pump incorporating same
WO2005010363A2 (fr) Vanne de pompe a course commandee
US6190143B1 (en) Piston pump with zero to negative clearance valve
CN215058025U (zh) 一种能够改善气密性的泵中阀片
CN219672817U (zh) 一种隔膜水泵
KR0138128Y1 (ko) 정수기용 가압펌프의 기밀유지장치
CN216157877U (zh) 一种具有阀片密封结构的微型高压液泵
CN220849948U (zh) 一种空气压缩机及储气系统
CN212360119U (zh) 一种隔膜泵流道密封结构
US20210123430A1 (en) Reciprocating volume pump
CN116591936A (zh) 一种隔膜水泵
JP6732195B2 (ja) ダイアフラム式ポンプの再始動装置及び同再始動装置を備えたダイアフラム式ポンプ
WO2003048577A1 (fr) Pompe a double action

Legal Events

Date Code Title Description
AS Assignment

Owner name: PRECISION DISPENSING SYSTEMS LIMITED, NEW ZEALAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GRAPES, ROBERT DONALD;REEL/FRAME:018316/0931

Effective date: 20060810

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION