EP0801228A2 - Doppelmembranpumpe - Google Patents

Doppelmembranpumpe Download PDF

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Publication number
EP0801228A2
EP0801228A2 EP97302476A EP97302476A EP0801228A2 EP 0801228 A2 EP0801228 A2 EP 0801228A2 EP 97302476 A EP97302476 A EP 97302476A EP 97302476 A EP97302476 A EP 97302476A EP 0801228 A2 EP0801228 A2 EP 0801228A2
Authority
EP
European Patent Office
Prior art keywords
valve
pump
air
ports
fluid
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.)
Granted
Application number
EP97302476A
Other languages
English (en)
French (fr)
Other versions
EP0801228A3 (de
EP0801228B1 (de
EP0801228B9 (de
Inventor
Kent P. Hand
Joel T. Fisher
Ann C. Feitel
Harold D. Johnson
Graig D. Burt
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.)
Graco Inc
Original Assignee
Graco Inc
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
Priority claimed from US08/837,237 external-priority patent/US5860794A/en
Application filed by Graco Inc filed Critical Graco Inc
Priority to EP99201777A priority Critical patent/EP0942171B1/de
Publication of EP0801228A2 publication Critical patent/EP0801228A2/de
Publication of EP0801228A3 publication Critical patent/EP0801228A3/de
Publication of EP0801228B1 publication Critical patent/EP0801228B1/de
Application granted granted Critical
Publication of EP0801228B9 publication Critical patent/EP0801228B9/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • 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
    • F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
    • F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
    • F04B45/041—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms double acting plate-like flexible pumping member
    • 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
    • F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0061—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using muffler volumes
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution 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
    • F04B43/02—Machines, pumps, or pumping installations having flexible working members having plate-like flexible members, e.g. diaphragms
    • F04B43/06—Pumps having fluid drive
    • F04B43/073—Pumps having fluid drive the actuating fluid being controlled by at least one valve
    • F04B43/0736—Pumps having fluid drive the actuating fluid being controlled by at least one valve with two or more pumping chambers in parallel
    • 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
    • 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
    • F04B53/22—Arrangements for enabling ready assembly or disassembly
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/129—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers
    • F04B9/131—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members
    • F04B9/135—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by two single-acting elastic-fluid motors, each acting in one direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/12—Kind or type gaseous, i.e. compressible
    • 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
    • Y10S417/00—Pumps

Definitions

  • Air operated double diaphragm pumps have been a popular product for many years and are widely used for the transfer of fluids and other uses. Such pumps are manufactured by a variety of producers using a number of different designs. While a variety of such designs have proven successful in the marketplace, it is always desirable to be able to reduce the manufacturing cost of such products and in general that often means reducing the parts count involved in such a product.
  • the design of the instant invention utilises a number of features which serve to achieve this end and which make the product more user friendly and adaptable for the end-user.
  • this invention provides a reciprocating air operated pump having pumping elements which reciprocate along a first axis characterised by including, an air valve comprising:
  • an air valve which moves in a rectangular path is provided which greatly reduces the parts count for a diaphragm pump air valve.
  • a valve carnage carries a valve cup and has pistons at either end which are driven by pilot air off of two of the five ports located underneath the valve cup.
  • the area over the valve plate and valve cup is pressurised with air effectively forming a sixth port and thus ports which are not covered by the valve cup are pressurised by high pressure plant air.
  • the valve cup is moved in a first direction by the valve carriage and in the second direction normal to the first direction by pins which are driven by the main diaphragm assembly.
  • this invention provides a pump for handling fluids and attachment to fluid lines, and characterised by having threads comprising:
  • molded threads on the manifold base are such as to allow use of either an American pipe thread (NPT) or British standard pipe thread (BSP).
  • NPT American pipe thread
  • BSP British standard pipe thread
  • the pump is provided with a manifold base to which system plumbing is connected so that when it is desired to service or replace the pump, several conventional fasteners need merely be loosened such that the main portion of the pump is lifted off the base and either serviced or replaced and then replaced into position without having to loosen or unseal the fluid fittings.
  • "O" rings provide a sealing assembly between the base and the main fluid section.
  • this invention provides a check valve characterised by comprising:
  • a one-piece check valve construction is utilised with the part having a central sealing disk having a plurality of radially axially extending guide members extending therefrom wherein each of the guide members has an outer diameter sized to slidingly fit within a cylindrical cavity and each of the guide members having axially opposite the sealing disk a plurality of circumferentially extending spring loaded fingers which serve to bias the check valve into a closed position.
  • this invention provides a pump for handling fluids and attachment to fluid lines, said pump being characterised comprising:
  • the main portion of the pump that is, the center section and fluid housing, is designed to fasten to a manifold base which contains the check valves and also which has threaded connections for connection to fluid lines for plumbing purposes. If it is desired to service the pump for various reasons, the main portion of the pump may be removed from the base without the need to unthread and disconnect the fluid fittings. This removal also allows direct access and replacement of the check valves without the need to further disassemble the pump.
  • this invention provides an air operated diaphragm pump characterised by having a center section containing an air valve and first and second air chambers, the improvement comprising externally accessible ports in said center section for attachment to externally operated solenoid air valves to control operation.
  • Figure 1 is a perspective view of the instant invention
  • Figure 2 is a sectional view taken along line 2-2 of Figure 1.
  • Figure 3 is a partially exploded view of the manifold base and check valves.
  • Figure 4 is a plan view of the center section and diaphragms.
  • FIGS 5 to 8 show the air valve in its sequence of operation.
  • Figure 9 is a sectional view taken along line 9-9 of Figure 1.
  • Figure 10 is a perspective view showing the valve carriage and valve block.
  • the instant invention generally designated 10 is shown in Figure 1 in perspective and is comprised of a molded center section 12, two fluid end sections 14 and a valve cover 16.
  • center section 12 is molded of polyester resin (PBT) Valox 357 - GE Plastic.
  • Cover 16 is fixed via conventional fasteners 18 to center section 12. Also affixed via fasteners 18 to center section 12 are fluid housings 14. The main portion of the pump comprised of center section 12 and fluid housing 14 is affixed to manifold base 20 also via fasteners 18. Manifold base 20 has fluid inlet and outlet passages 22 and 24 respectively located at each end to allow variety in plumbing arrangements.
  • check valves 26 are each comprised of a central sealing area 26A having in the preferred embodiment four radially and axially extending arms 26B extending therefrom and having a surface 26C which closely positions check valve 26 in check valve passages 28.
  • Spring loaded fingers 26D extend from either side of arm 26B and act against the bottom or top of passage 28 to bias check valve 26 into the closed position where it will remain unless fluid pressure against sealing area 26A should press it open.
  • the radially extending guide members 26B also act as a stop. The spring fingers 26D compress and the top of the guide arms 26C butts up against the fluid cover 14 on the inlet check and the manifold base 20 on the outlet check. This limits the check valve travel,
  • cover 16 has an air inlet 32 which pressurises the area underneath cover 18.
  • First and second auxiliary ports 54 and 56 respectively are located in the side of center housing 14 for direct, connection of air from solenoid valves if it is desired to have the pump controlled remotely rather than through the integral air valve.
  • the integral ports 54 and 56 make it easy to change a pump from air valve operated to a remotely operated pump by removing the air valve cup and replacing it with an air valve plug.
  • valve assembly 34 is comprised of a valve carriage 36 which has generally cylindrical end portions 36A having seals 36B thereon, a rectangular central aperture 36C which retains moveable valve block 38.
  • Valve block 38 has a lower sealing section 38A and a central section 38B within aperture 36C of carriage 36 which thereby allows valve block 38 to move normal to the plane of Figure 2. This movement occurs due to pushing on block 38 by means of pins 40 which are actuated by diaphragm mounting block 41 in the center of diaphragm 42.
  • valve block 38 is formed of 90 Durometer XNBR (Carboxylated Nitrile) with 10% TFE powder to reduce friction.
  • air passages M1 and M2 connect to the main air chambers on the inner side of diaphragm assemblies 42 for pressurising the air chambers with compressed air as will be more fully described in the operation of the air valve hereinafter.
  • Passages P1 and P2 connect to air chambers 44 and 46 respectively, passages P1 and P2 running as shown in the drawings as straight passages and thence are covered and connected to chambers 44 and 46 by cover 16.
  • Valve block 38 is retained in place in valve carriage 36 by boss 16A on cover 16. To disassemble the valve assembly, one merely need remove fasteners 18 from cover 16 and lift cover 16 off whereupon valve block 38 is lifted upwardly thereby allowing valve carriage 36 to be slid out of center housing 16.
  • FIGS 5 to 8 show views of the valve port surface 48 which has five ports therein.
  • Central exhaust port E is connected to the exhaust passage 50 while pilot ports P1 and P2 are connected to first and second ends respectively of the pilot valve carriage 36.
  • main ports M1 and M2 are connected to first and second diaphragm air chambers respectively.
  • the space 52 above the ports referred to is generally filled with compressed air and ports which are not covered by the valve block 38 are pressurised with the compressed air.
  • the diaphragms are moving together to the right while the pilot value carriage 36 is in the down position.
  • the valve block 38 is moved into the lower right hand position of Figure 8 whereupon compressed air is fed to ports P2 and M2 while ports P1 and M1 are exhausted. This pressurises the lower end of the pilot valve carriage 36 and the pilot valve carriage 36 and the valve block 38 move upwardly to the point where the description started above.
  • valve cover 16 which also covers the top of the valve cavity at the same time.
  • the inlet threads on the manifold base are such that it allows use of either all American pipe thread (NPT) or British standard pipe thread (BSP).
  • NPT American pipe thread
  • BSP British standard pipe thread
  • This hybrid thread may be formed in plastic parts and is intended to form a pressure tight joint with either plastic or brass male pipe threaded fitting of either type thread.
  • the thread is defined as follows: Major diameter .518" (13.16 mm) Pitch .4843" (12.30 mm) Minor Diameter .4506" (11.45 mm) Angle 1 degree 47 minutes Threads per inch 18.6 (7.32 threads per cm) Effective thread .402" (10.21 mm)
  • the muffler 54 is best seen in Figure 9.
  • Exhaust port E leads to cylindrical passage 56 which is divided into first and second portions 56A and 56B by divider 56C.
  • the passage is completed by a muffler area 58 in manifold base 20.
  • exhaust flows out port E, into first portion 56A and into muffler area 58 whereupon it flows upwardly through second portion 56B and out through muffler outlet 60.
  • This arrangement allows substantial muffling at low cost and with little penalty to performance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Check Valves (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)
EP97302476A 1996-04-12 1997-04-11 Doppelmembranpumpe Expired - Lifetime EP0801228B9 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99201777A EP0942171B1 (de) 1996-04-12 1997-04-11 Doppelmembranpumpe

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US1565096P 1996-04-12 1996-04-12
US15650 1996-04-12
US08/837,237 US5860794A (en) 1997-04-10 1997-04-10 Double diaphragm pump with air valve block moving in a rectangular pattern
US837237 1997-04-10

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP99201777A Division EP0942171B1 (de) 1996-04-12 1997-04-11 Doppelmembranpumpe

Publications (4)

Publication Number Publication Date
EP0801228A2 true EP0801228A2 (de) 1997-10-15
EP0801228A3 EP0801228A3 (de) 1999-07-21
EP0801228B1 EP0801228B1 (de) 2003-07-02
EP0801228B9 EP0801228B9 (de) 2003-10-08

Family

ID=26687654

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97302476A Expired - Lifetime EP0801228B9 (de) 1996-04-12 1997-04-11 Doppelmembranpumpe

Country Status (6)

Country Link
EP (1) EP0801228B9 (de)
JP (2) JP4004097B2 (de)
KR (2) KR100491065B1 (de)
CN (2) CN1081747C (de)
AR (1) AR006617A1 (de)
DE (2) DE69723290T2 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2463822A (en) * 2005-05-17 2010-03-31 Thomas Industries Inc Pump with elastomeric tube mounts
WO2023020867A1 (en) * 2021-08-17 2023-02-23 Koninklijke Philips N.V. Suspension system, compressor assembly and portable oxygen concentrator
US12135021B2 (en) 2022-07-05 2024-11-05 Koninklijke Philips N.V. Suspension system, compressor assembly and portable oxygen concentrator

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2478784B (en) * 2010-03-19 2017-01-25 Finishing Brands Holdings Inc Improvements in diaphragm pumps
CN105351180A (zh) * 2015-11-03 2016-02-24 王庆昌 一种双出双进整体式气动隔膜泵
CN106762575A (zh) * 2016-12-30 2017-05-31 张家港科康智能科技有限公司 一种紧凑性压缩气体隔膜泵
US10823167B2 (en) * 2019-01-31 2020-11-03 Wilden Pump And Engineering Llc Pump assembly
CN110374846B (zh) * 2019-07-13 2020-12-11 新沂市锡沂高新材料产业技术研究院有限公司 一种双向气动隔膜泵的交替配气方法
CN110529367B (zh) * 2019-07-26 2020-12-15 宁波钱湖石油设备有限公司 一种高压往复隔膜泵液力端结构
DE102019132711A1 (de) 2019-12-02 2021-06-02 Fte Automotive Gmbh Flüssigkeitspumpe, insbesondere zur Versorgung eines Getriebes oder einer Kupplung im Antriebsstrang eines Kraftfahrzeugs

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4385869A (en) * 1980-06-28 1983-05-31 Far East Engineering Co., Ltd. Reciprocation pump
US4597403A (en) * 1983-03-14 1986-07-01 Milburn Jr William W Nutation valving apparatus and method of operation
EP0609044A1 (de) * 1993-01-25 1994-08-03 The Aro Corporation Luft-Ventilmechanismus in Kombination mit einer Doppel-Membranpumpe
WO1996008130A2 (de) * 1994-08-08 1996-03-21 Huewel Ralf Hydraulisch oder pneumatisch betriebene kolben- und/oder membran-pumpe

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2748752A (en) * 1952-04-11 1956-06-05 Baghuis Ludovicus Hendrikus Automatically reversing valves
US4138089A (en) * 1977-08-09 1979-02-06 The United States Of America As Represented By The Secretary Of The Department Of Health, Education And Welfare Slide valve
US4854832A (en) * 1987-08-17 1989-08-08 The Aro Corporation Mechanical shift, pneumatic assist pilot valve for diaphragm pump
US5062770A (en) * 1989-08-11 1991-11-05 Systems Chemistry, Inc. Fluid pumping apparatus and system with leak detection and containment
DE4111463A1 (de) * 1991-04-09 1992-10-15 Festo Kg Aussengewinde und innengewinde, vorzugsweise zur herstellung fluidischer verbindungen in der pneumatik
US5240390A (en) * 1992-03-27 1993-08-31 Graco Inc. Air valve actuator for reciprocable machine
US5326234A (en) * 1993-02-17 1994-07-05 Versa-Matic Tool, Inc. Fluid driven pump
US5391060A (en) * 1993-05-14 1995-02-21 The Aro Corporation Air operated double diaphragm pump
US5368452A (en) * 1993-07-20 1994-11-29 Graco Inc. Double diaphragm pump having two-stage air valve actuator
CN2174578Y (zh) * 1993-09-02 1994-08-17 淄博潜水电泵厂 一种双隔膜泵

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4385869A (en) * 1980-06-28 1983-05-31 Far East Engineering Co., Ltd. Reciprocation pump
US4597403A (en) * 1983-03-14 1986-07-01 Milburn Jr William W Nutation valving apparatus and method of operation
EP0609044A1 (de) * 1993-01-25 1994-08-03 The Aro Corporation Luft-Ventilmechanismus in Kombination mit einer Doppel-Membranpumpe
WO1996008130A2 (de) * 1994-08-08 1996-03-21 Huewel Ralf Hydraulisch oder pneumatisch betriebene kolben- und/oder membran-pumpe

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2463822A (en) * 2005-05-17 2010-03-31 Thomas Industries Inc Pump with elastomeric tube mounts
GB2463822B (en) * 2005-05-17 2010-06-09 Thomas Industries Inc Pump improvements
GB2426556B (en) * 2005-05-17 2010-06-09 Thomas Industries Inc Pump improvements
US9074589B2 (en) 2005-05-17 2015-07-07 Thomas Industries, Inc. Pump
WO2023020867A1 (en) * 2021-08-17 2023-02-23 Koninklijke Philips N.V. Suspension system, compressor assembly and portable oxygen concentrator
US12135021B2 (en) 2022-07-05 2024-11-05 Koninklijke Philips N.V. Suspension system, compressor assembly and portable oxygen concentrator

Also Published As

Publication number Publication date
JP2007285301A (ja) 2007-11-01
AR006617A1 (es) 1999-09-08
DE69723144T2 (de) 2004-04-29
CN1374455A (zh) 2002-10-16
EP0801228A3 (de) 1999-07-21
KR19980076691A (ko) 1998-11-16
CN1174293A (zh) 1998-02-25
JPH1030570A (ja) 1998-02-03
DE69723144D1 (de) 2003-08-07
CN1165699C (zh) 2004-09-08
CN1081747C (zh) 2002-03-27
EP0801228B1 (de) 2003-07-02
KR100491065B1 (ko) 2005-08-12
DE69723290T2 (de) 2004-02-05
JP4004097B2 (ja) 2007-11-07
EP0801228B9 (de) 2003-10-08
KR100461707B1 (ko) 2004-12-16
DE69723290D1 (de) 2003-08-07

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