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EP0942171B1 - Doppelmembranpumpe - Google Patents

Doppelmembranpumpe Download PDF

Info

Publication number
EP0942171B1
EP0942171B1 EP99201777A EP99201777A EP0942171B1 EP 0942171 B1 EP0942171 B1 EP 0942171B1 EP 99201777 A EP99201777 A EP 99201777A EP 99201777 A EP99201777 A EP 99201777A EP 0942171 B1 EP0942171 B1 EP 0942171B1
Authority
EP
European Patent Office
Prior art keywords
valve
ports
air
check valve
sealing disk
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.)
Expired - Lifetime
Application number
EP99201777A
Other languages
English (en)
French (fr)
Other versions
EP0942171A2 (de
EP0942171A3 (de
Inventor
Kent P. Hand
Ann C. Feitel
Joel T. Fisher
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 claimed from EP97302476A external-priority patent/EP0801228B9/de
Publication of EP0942171A2 publication Critical patent/EP0942171A2/de
Publication of EP0942171A3 publication Critical patent/EP0942171A3/de
Application granted granted Critical
Publication of EP0942171B1 publication Critical patent/EP0942171B1/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
    • 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
    • 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
    • F04B53/16—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
    • 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

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.
  • French patent publication No. 2372363 discloses a washing machine water outlet pipe valve, which prevents return flow of dirty water to a wash tub.
  • the valve is a non-return valve comprising a hollow valve head and finger-shaped guides within a housing. 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.
  • a check valve 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.
  • 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 13.16 mm (0.518") Pitch 12.30 mm (0.4843" ) Minor Diameter 11.45 mm (0.4506”) Angle 1 degree 47 minutes Threads per cm 7.32 ( 18.6 threads per inch) Effective thread 10.21 mm (0.402" )
  • 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)

Claims (1)

  1. Rückschlagventil (26), umfassend:
    einen im allgemeinen zylindrischen Hohlraum (28);
    eine zentrale Dichtungsscheibe (26A);
    mehrere Führungselemente (26B), die sich radial und axial von der zentralen Dichtungsscheibe erstrecken, wobei jedes Führungselement einen Außendurchmesser aufweist, der so bemessen ist, daß er gleitend in den zylindrischen Hohlraum paßt; gekennzeichnet durch
    mehrere sich in Umfangsrichtung erstreckende, federbelastete Finger (26D) auf jedem Führungselement, die der Dichtscheibe axial gegenüberliegen und zum Vorbelasten des Rückschlagventils in eine geschlossene Position des Rückschlagventils dienen.
EP99201777A 1996-04-12 1997-04-11 Doppelmembranpumpe Expired - Lifetime EP0942171B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US1565096P 1996-04-12 1996-04-12
US15650P 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
EP97302476A EP0801228B9 (de) 1996-04-12 1997-04-11 Doppelmembranpumpe

Related Parent Applications (1)

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

Publications (3)

Publication Number Publication Date
EP0942171A2 EP0942171A2 (de) 1999-09-15
EP0942171A3 EP0942171A3 (de) 2000-02-09
EP0942171B1 true EP0942171B1 (de) 2003-07-02

Family

ID=27238604

Family Applications (1)

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

Country Status (1)

Country Link
EP (1) EP0942171B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101432324B1 (ko) 2006-06-08 2014-08-20 래리 앨빈 슈츨 왕복운동식 압축기 또는 펌프 및 왕복운동식 압축기를 구비하는 휴대가능한 공구 전력 공급 시스템
US20100215519A1 (en) * 2009-02-25 2010-08-26 Idex Aodd, Inc. Air operated double diaphragm over center valve pump

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1173298B (de) * 1958-10-03 1964-07-02 Unilever Nv Selbsttaetig oeffnender und schliessender Verschluss fuer zusammendrueckbare Tuben
DE7636915U1 (de) * 1976-11-24 1977-08-18 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart Rueckschlagventil fuer wasserfuehrende geraete, insbesondere geschirrspuel- oder waschmaschinen
JPS5713281A (en) * 1980-06-28 1982-01-23 Far East Eng Kk Reciprocating pump
US4597403A (en) * 1983-03-14 1986-07-01 Milburn Jr William W Nutation valving apparatus and method of operation
IT211767Z2 (it) * 1987-06-03 1989-04-07 Itap Spa Valvola di ritegno e di pescaggio con otturatore autoguidato nel corpo della valvola.
GB9116863D0 (en) * 1991-08-03 1991-09-18 Bema Sports Company Limited A valve
US5334003A (en) * 1993-01-25 1994-08-02 The Aro Corporation Air valving mechanism, in combination with a double diaphragm pump subassembly
DE4427981C1 (de) * 1994-08-08 1995-12-07 Huewel Ralf Hydraulisch oder pneumatisch betriebene Kolben- und/oder Membran-Pumpe

Also Published As

Publication number Publication date
EP0942171A2 (de) 1999-09-15
EP0942171A3 (de) 2000-02-09

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