WO2005088128A1 - Pompe a membrane - Google Patents

Pompe a membrane Download PDF

Info

Publication number
WO2005088128A1
WO2005088128A1 PCT/NZ2005/000046 NZ2005000046W WO2005088128A1 WO 2005088128 A1 WO2005088128 A1 WO 2005088128A1 NZ 2005000046 W NZ2005000046 W NZ 2005000046W WO 2005088128 A1 WO2005088128 A1 WO 2005088128A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
cavity
membrane
housing
port
Prior art date
Application number
PCT/NZ2005/000046
Other languages
English (en)
Inventor
Robert Donald Grapes
Original Assignee
Precision Dispensing Systems Limited
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 Limited filed Critical Precision Dispensing Systems Limited
Priority to CA002557253A priority Critical patent/CA2557253A1/fr
Priority to AU2005220568A priority patent/AU2005220568B2/en
Priority to EP05722117.8A priority patent/EP1730403B1/fr
Priority to US10/593,174 priority patent/US20070140873A1/en
Publication of WO2005088128A1 publication Critical patent/WO2005088128A1/fr
Priority to US12/582,665 priority patent/US8454324B2/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/02—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 pu mp.
  • 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 99/01 687 and WO 02/1 8790.
  • WO 02/ 1 8790 there is described 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 tu be 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 th»e 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.
  • Figure 1 is a longitudinal cross-section through tPie pump
  • Figure 2 is an exploded view in cross-section of t he pump as shown in Figure 1 ,
  • Figure 3 is a transverse cross-sectional view tak «n between the inlet and outlet ports but showing only two sections of the pump body
  • Figure 4 is a perspective view of one housing section of the pump
  • Figure 5 is a schematic view of the pump on an exhaust cycle
  • Figure 6 is a view similar to Figure 5 but of the inlet cycle
  • Figure 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 1 1 and 1 2. When these are assembled together they define an internal pump cavity 1 3. Clamped between the housing sections 1 1 and 1 2, as will hereinafter be described, is a membrane 14 which is made from a suitable flexible material.
  • the cavity 1 3 is elongate and, as shown in Figure 4, each end 1 5 is complex curved. In cross-section as shown in Figure 1 , each end is also curved as indicated at 1 5. Furthermore, in transverse cross-section as shown in Figure 3, the cavity 1 3 is also of curved cross-section.
  • Housing section 1 1 incorporates a rebate 16, which effectively results in an upstand or projecting portion 1 7.
  • the cavity section 1 3a is effectively located, at least in part, in the resultant upstanding portion 1 7.
  • the other housing section 1 2 has a recessed portion 1 8 with cavity section 1 3b extending away from the floor of the recess 1 8.
  • the projecting portion 1 7 engages snugly within recess 1 8.
  • this distance D 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 1 0.
  • the membran e 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 1 8.
  • the overall peripheral dimensions of the membrane 14 are greater than the peri pheral dimensions of the sidewall 21 of the recess 1 8.
  • the membrane 14 when the housing section 1 1 is combined with housing section 1 2 (the membrane 14 being in place in recess 1 8) the fact that di stance 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 1 3b. Thus, in effect the membrane 14 is in contact with, or located closely adjacent to the overall surface of the cavity section 1 3b.
  • a port 22 is formed in the housing section 1 2 and opens into the cavity section 1 3b. This port 22 can be offset toward one end of the cavity 1 3, as shown in the drawings, or else it can be located midway in the length of the cavity 1 3.
  • a narrow groove 22a can be formed in the wall surface of the cavity section 1 3b and extend along the length of the cavity 1 3 either side of from the port 22. Also a similar narrow groove (not shown) can be formed in cavity 1 3b.
  • the effect of the narrow groove(s) is to prevent the pump from "clnoking" 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 d own to when the membrane comes into full overall contact with the cavity surface.
  • a port which opens from the cavity 1 3 to the outer surface 23 of housing section 1 1 .
  • Port 24 functions as an inlet port while port 25 functions as an outlet or exhaust port.
  • Each of inlet ports 24 and e> haust port 25 can, as shown, be made up by a plurality of separate passages 24a and 2 5a respectively.
  • a recess 26 is formed in the surface 23 of housing section 1 1 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 annul ar 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.
  • One stable position of the membrane 14 is shown in full detail in Figure 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 1 3b and when in the second stable position the membrane 14 is located in the cavity section 1 3a.
  • 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 PI and positive P2 pressures applied to the cavity 1 3b through port 22. Consequently with the pump in the configuration shown in Figure 1 and inlet and outlet conduits or lines attached to connectors 31 and 32 a positive pressure P2 (see Figure 5) applied through port 22 will force the membrane 14 into an opposite stable position.
  • a positive pressure P2 (see Figure 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 1 3 i.e. to that side of the membrane opposite to that which faces port 22, is exhausted through the outlet valve 25.
  • 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.
  • FIG. 1 there is a pneumatic operator 33 that has a body 34 wh ⁇ ch 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 electr ⁇ c 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 1 0 but it will be a-ppreciated by those skilled in the art that the pneumatic operator 33 could be located quite some distance away from the pump 1 0 and connected by a conduit extending between ports 22 and 41 .
  • a recess 43 is formed in the inside surface of the side wall 34a of body 34. The recess is located adjacent the end of wall 42.
  • a port 43a which opens to atmosphere.
  • the port 43a 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 position of port 43a can be varied dependent on use requirements that may require venting before the full stroke of piston 36 has been completed. Consequently, when the piston 36 advances toward end wall 42 the air in chamber 35 becomes compressed and the resultant positive pressure P2 works on the membrane 14 to force it into cavity section 1 3a.
  • the piston sealing ring 36a is positioned within the area of the recess 43 whereby air can flow past the sealing ring 36a and exhaust through the clearance between the piston 36 and surface of wall 36a.
  • a port 43' in the wall 34a 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. This action causes the chamber 35 to vent to atmosphere (via vent 49) for the period of time that the pin 51 fails to seal closed 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 1 3.
  • 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.
  • the 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)

Abstract

L'invention concerne une pompe qui comporte une cavité (13) dans laquelle est placée une membrane flexible (14). Un orifice d'entrée (24) aboutissant dans la cavité (13) est associé à une soupape (27). Une soupape (28) est prévue de façon identique dans un orifice de sortie (25). Des moyens pouvant être reliés à un orifice (22) aboutissant également dans la cavité (13) permettent d'appliquer des pressions négatives et positives pour déplacer la membrane flexible (14) entre ses deux états, qui correspondent à la mise en oeuvre des étapes d'aspiration et de refoulement d'un cycle de pompage.
PCT/NZ2005/000046 2004-03-18 2005-03-18 Pompe a membrane WO2005088128A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA002557253A CA2557253A1 (fr) 2004-03-18 2005-03-18 Pompe a membrane
AU2005220568A AU2005220568B2 (en) 2004-03-18 2005-03-18 A membrane pump
EP05722117.8A EP1730403B1 (fr) 2004-03-18 2005-03-18 Pompe a membrane
US10/593,174 US20070140873A1 (en) 2004-03-18 2005-03-18 Pump
US12/582,665 US8454324B2 (en) 2004-03-18 2009-10-20 Pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ531822A NZ531822A (en) 2004-03-18 2004-03-18 A membrane pump
NZ531822 2004-03-18

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US10/593,174 A-371-Of-International US20070140873A1 (en) 2004-03-18 2005-03-18 Pump
US12/582,665 Continuation-In-Part US8454324B2 (en) 2004-03-18 2009-10-20 Pump

Publications (1)

Publication Number Publication Date
WO2005088128A1 true WO2005088128A1 (fr) 2005-09-22

Family

ID=34975651

Family Applications (1)

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

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 (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

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8197231B2 (en) 2005-07-13 2012-06-12 Purity Solutions Llc Diaphragm pump and related methods
EP2010247A1 (fr) * 2006-04-14 2009-01-07 Deka Products Limited Partnership Systèmes, dispositifs et procédés de pompage de fluide, échange de chaleur, détection thermique, et détection de conductivité
US8042563B2 (en) 2007-02-27 2011-10-25 Deka Products Limited Partnership Cassette system integrated apparatus
US9610392B2 (en) 2012-06-08 2017-04-04 Fresenius Medical Care Holdings, Inc. Medical fluid cassettes and related systems and methods
AU2014348695B2 (en) * 2013-11-15 2019-05-16 Fresenius Kabi Usa, Llc Pump chamber including internal surface modifications
JP7119328B2 (ja) * 2017-10-05 2022-08-17 ニプロ株式会社 圧力測定用チャンバ
WO2019191645A1 (fr) 2018-03-30 2019-10-03 Deka Products Limited Partnership Cassettes de pompage de liquide et collecteur de distribution de pression associé, et procédés associés

Citations (7)

* 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
US3485258A (en) 1966-04-14 1969-12-23 Greene Eng Co Bistable fluid device
US3955901A (en) 1973-10-23 1976-05-11 Hamilton Thomas W Membrane 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
EP0314379A1 (fr) 1987-10-26 1989-05-03 D.F. Laboratories Ltd. Membrane et dispositif de commande de transfert de fluide, actionné par membrane
US5669764A (en) 1994-10-07 1997-09-23 Bayer Corporation Pneumatic diaphragm pump

Family Cites Families (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE1528500B1 (de) * 1965-12-16 1970-02-12 Orlita Kg Membranpumpe
GB1210065A (en) * 1967-03-31 1970-10-28 I V Pressure Controllers Ltd Improvements in or relating to 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
SE7413016L (sv) * 1974-10-16 1976-04-20 Piab Ab Pump med fram- och atergaende pumporgan
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
ATE10670T1 (de) * 1980-12-29 1984-12-15 Lewa Herbert Ott Gmbh + Co. Membranpumpe mit druckentlastet eingespannter membran.
DE3408331C2 (de) * 1984-03-07 1986-06-12 Fresenius AG, 6380 Bad Homburg Pumpanordnung für medizinische Zwecke
DE3414006C2 (de) * 1984-04-13 1986-03-06 Bran & Lübbe GmbH, 2000 Norderstedt Kolbenmembranpumpe
US4904167A (en) * 1987-02-26 1990-02-27 Karl Eickmann Membranes and neighboring members in pumps, compressors and devices
IL83259A (en) * 1987-07-20 1992-05-25 D F Lab Ltd Disposable cell and diaphragm pump for use of same
AU611072B2 (en) * 1988-12-29 1991-05-30 Chang, Ann Lois Diaphragm pump
US5167837A (en) * 1989-03-28 1992-12-01 Fas-Technologies, Inc. Filtering and dispensing system with independently activated pumps in series
US5423738A (en) * 1992-03-13 1995-06-13 Robinson; Thomas C. Blood pumping and processing system
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
DE10012904B4 (de) * 2000-03-16 2004-08-12 Lewa Herbert Ott Gmbh + Co Membraneinspannung mit Elastizitätsausgleich
WO2002018790A1 (fr) * 2000-08-28 2002-03-07 Precision Dispensing Systems Limited Mecanisme de pincement pneumatique pour tube deformable
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
DE10216146A1 (de) * 2002-04-12 2003-10-30 Bayer Ag Membranpumpe
JP2005163564A (ja) * 2003-11-28 2005-06-23 Toyota Industries Corp ダイヤフラム装置

Patent Citations (7)

* 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
US3485258A (en) 1966-04-14 1969-12-23 Greene Eng Co Bistable fluid device
US3955901A (en) 1973-10-23 1976-05-11 Hamilton Thomas W Membrane 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
EP0314379A1 (fr) 1987-10-26 1989-05-03 D.F. Laboratories Ltd. Membrane et dispositif de commande de transfert de fluide, actionné par membrane
US5669764A (en) 1994-10-07 1997-09-23 Bayer Corporation Pneumatic diaphragm pump

Cited By (4)

* 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
US11193478B2 (en) 2018-06-08 2021-12-07 Koge Micro Tech Co., Ltd. Diaphragm pump and valve plate thereof

Also Published As

Publication number Publication date
AU2005220568B2 (en) 2011-01-06
US20070140873A1 (en) 2007-06-21
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
US7399168B1 (en) Air driven diaphragm pump
US5362212A (en) Air driven diaphragm pump
GB2452139A (en) Check valve
CA2440520C (fr) Robinets anti-givrage, moteur a gaz, et pompe a membrane equipee de ces derniers
US5441281A (en) Shaft seal
US6887047B2 (en) Pneumatic pinch mechanism for a deformable tube
EP1646790B1 (fr) Vanne de pompe a course commandee
US5611678A (en) Shaft seal arrangement for air driven diaphragm pumping systems
US7367785B2 (en) Reduced icing valves and gas-driven motor and reciprocating pump incorporating same
WO2004044423A1 (fr) Tete de compresseur
CN219672817U (zh) 一种隔膜水泵
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
KR0138128Y1 (ko) 정수기용 가압펌프의 기밀유지장치
CN116591936A (zh) 一种隔膜水泵
CN212360119U (zh) 一种隔膜泵流道密封结构
CN216157877U (zh) 一种具有阀片密封结构的微型高压液泵
WO2003048577A1 (fr) Pompe a double action
RU2028509C1 (ru) Перистальтический насос
CN117028208A (zh) 一种空气压缩机及储气系统
GB2369411A (en) Double-acting pump with pressure equalisation between chambers

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SM SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2005220568

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: 2557253

Country of ref document: CA

ENP Entry into the national phase

Ref document number: 2005220568

Country of ref document: AU

Date of ref document: 20050318

Kind code of ref document: A

WWP Wipo information: published in national office

Ref document number: 2005220568

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: 2007140873

Country of ref document: US

Ref document number: 10593174

Country of ref document: US

WWE Wipo information: entry into national phase

Ref document number: 2005722117

Country of ref document: EP

NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Ref document number: DE

WWP Wipo information: published in national office

Ref document number: 2005722117

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 10593174

Country of ref document: US