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WO1997016626A1 - Ensemble piston-membrane - Google Patents

Ensemble piston-membrane Download PDF

Info

Publication number
WO1997016626A1
WO1997016626A1 PCT/US1996/017314 US9617314W WO9716626A1 WO 1997016626 A1 WO1997016626 A1 WO 1997016626A1 US 9617314 W US9617314 W US 9617314W WO 9716626 A1 WO9716626 A1 WO 9716626A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
diaphragm
rib portion
diaphragm assembly
channel
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.)
Ceased
Application number
PCT/US1996/017314
Other languages
English (en)
Inventor
Yutaka Kaneko
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
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 Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Priority to AU75987/96A priority Critical patent/AU7598796A/en
Publication of WO1997016626A1 publication Critical patent/WO1997016626A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F04B43/0063—Special features particularities of the flexible members bell-shaped flexible members

Definitions

  • the present system relates to a piston-diaphragm assembly for use in a fill pump of a container filling machine.
  • a piston-diaphragm assembly for use in a fill pump of a container filling machine.
  • One such machine is disclosed in U.S.S.N. 08/315,246, filed September 29, 1994, entitled "Packaging Machine System For
  • Prior piston-diaphragm assemblies have utilized diaphragm that are mounted to the piston using an adhesive mount.
  • a flexible diaphragm 10 is mounted to a plate 15 using an adhesive at the interface therebetween.
  • the plate 15 comprises a circular member having a threaded extension 20.
  • the threaded extension 20 engages a corresponding threaded portion of a piston 25.
  • Piston 25 includes a recessed portion 30 for accepting plate 15 when plate 15 is screwed to the piston 25.
  • a further flexible diaphragm 35 is disposed on an opposite end of the piston 25.
  • the further diaphragm 35 includes a cut-out portion through which end 40 of piston 25 protrudes.
  • the remaining flange 45 of the further diaphragm 35 is secured against the piston 25 by a holder 46, washer 50, and securement screws (not illustrated in Figure 1) that extend through the holder 46 and washer
  • the holder 46 engages a drive rod that is used to mechanically move the piston 25 in the directions illustrated by arrow 55.
  • End portion 60 of diaphragm 10 is fixedly secured, for example, over a pump opening that is in fluid communication with a fluid source and fluid exit.
  • the piston 25 is driven in the directions of arrows 55, it is alternately compressed and expanded to expel and suction fluid, respectively.
  • Such compression and expansion creates stress on the adhesive bond between the diaphragm 10 and plate 15.
  • the adhesive bond fails and the diaphragm 10 and plate 15 must be either repaired or replaced. Such failures increase the cost of running the machine and, further, result in costly down time during which the machine is not producing.
  • An improved piston diaphragm assembly comprises a piston having a first end and a second end. A center hole is located in the first end of the piston. In addition, a channel is formed in the first end of the piston.
  • the piston diaphragm assembly further comprises a diaphragm having a rib portion. A plate is constructed and arranged to capture the rib portion of the diaphragm in the channel of the piston. The plate is secured by connecting means for holding the plate to the piston. The connecting means passes through the plate and mounts to the center hole of the piston.
  • Figure 1 is a side, cross-sectional view of a prior piston-diaphragm assembly.
  • Figure 2 is a side, cross-sectional view of one embodiment of an improved piston-diaphragm assembly.
  • Figure 3 is an exploded view assembly diagram for the piston-diaphragm assembly of Figure 2, including a corresponding drive rod assembly and guide rod assembly.
  • Figure 4 is a perspective view of the assembled piston-diaphragm assembly of Figure 3.
  • An improved piston-diaphragm assembly is shown generally at 100 of
  • the piston-diaphragm assembly 100 includes first and second diaphragms 105, 110 disposed at opposite ends of a piston 1 15.
  • the first and second diaphragms 105, 110 may be similarly or identically constructed and include rib portions 120, 125, respectively.
  • the rib portion 120 of the first diaphragm 105 engages a circular channel 130 disposed in end portion 135 of the piston 115.
  • a diaphragm plate 140 is placed into the interior portion of the first diaphragm 105 and is secured with a centrally disposed screw 145 that extends through a central aperture 147 in the diaphragm plate 140 to engage a corresponding threaded aperture 150 in the piston 115.
  • An O-ring 155 may be used to seal the area between the screw 145 and the central aperture 147.
  • the diaphragm plate 140 includes a flanged portion 160 disposed about its outer perimeter that urges the rib portion 120 into the circular channel 130.
  • the rib portion 125 of the second diaphragm 110 engages a circular channel 165 disposed in end portion 170 of piston 115.
  • a washer 175 is disposed about a protruding portion 180 of the piston 115.
  • a diaphragm holder 185 is disposed over the washer 175. Securements, such as screws, extend through a flanged portion 190 of holder 185 and the washer 175 and into the piston 115 to thereby secure the second diaphragm 110.
  • the channels 130, 165 and rib portions 120, 125 are dimensioned so that the rib portions 120, 125 are compressed within the channels 130, 165 when the diaphragms 105, 110 are secured to the respective ends of the piston. In this manner, a liquid seal is provided between the diaphragms 105, 110 and the piston

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

Nouvel ensemble piston-membrane (100) comprenant un piston (115) comportant des première et deuxième extrémités. Un orifice central (150) est ménagé dans la première extrémité du piston. En outre, une cannelure (130) est ménagée dans cette première extrémité du piston. L'ensemble piston-membrane comporte en outre une membrane (105) présentant un secteur nervuré (120). Une platine (140) est conçue et disposée de manière à ce que le secteur nervuré de la membrane se place dans la cannelure du piston. La platine est fixée par un appareil de connexion (145) qui la maintient au piston. Cet appareil de connexion traverse la platine et s'engage dans l'orifice central du piston.
PCT/US1996/017314 1995-11-02 1996-10-30 Ensemble piston-membrane Ceased WO1997016626A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU75987/96A AU7598796A (en) 1995-11-02 1996-10-30 Piston diaphragm assembly

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US617595P 1995-11-02 1995-11-02
US60/006,175 1995-11-02
US73864096A 1996-10-29 1996-10-29
US08/738,640 1996-10-29

Publications (1)

Publication Number Publication Date
WO1997016626A1 true WO1997016626A1 (fr) 1997-05-09

Family

ID=26675282

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/017314 Ceased WO1997016626A1 (fr) 1995-11-02 1996-10-30 Ensemble piston-membrane

Country Status (2)

Country Link
AU (1) AU7598796A (fr)
WO (1) WO1997016626A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007070317A1 (fr) * 2005-12-14 2007-06-21 Evergreen Packaging International B.V. Pompe à piston avec membrane en bouton

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572217A (en) * 1969-05-15 1971-03-23 Stuart E Corry Coupling device for fluid pressure transmission conduits
US4286932A (en) * 1978-02-14 1981-09-01 Nippondenso Co., Ltd. Diaphragm pump
US4522220A (en) * 1982-02-06 1985-06-11 Honeywell Gmbh Diaphragm module for pneumatic control systems
US4880213A (en) * 1986-01-30 1989-11-14 Nhk Spring Co., Ltd. Gas spring apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3572217A (en) * 1969-05-15 1971-03-23 Stuart E Corry Coupling device for fluid pressure transmission conduits
US4286932A (en) * 1978-02-14 1981-09-01 Nippondenso Co., Ltd. Diaphragm pump
US4522220A (en) * 1982-02-06 1985-06-11 Honeywell Gmbh Diaphragm module for pneumatic control systems
US4880213A (en) * 1986-01-30 1989-11-14 Nhk Spring Co., Ltd. Gas spring apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007070317A1 (fr) * 2005-12-14 2007-06-21 Evergreen Packaging International B.V. Pompe à piston avec membrane en bouton

Also Published As

Publication number Publication date
AU7598796A (en) 1997-05-22

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