CA2109137A1 - Spring Device - Google Patents

Spring Device

Info

Publication number
CA2109137A1
CA2109137A1 CA2109137A CA2109137A CA2109137A1 CA 2109137 A1 CA2109137 A1 CA 2109137A1 CA 2109137 A CA2109137 A CA 2109137A CA 2109137 A CA2109137 A CA 2109137A CA 2109137 A1 CA2109137 A1 CA 2109137A1
Authority
CA
Canada
Prior art keywords
piston
space
axial
chamber part
chambers
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
CA2109137A
Other languages
French (fr)
Other versions
CA2109137C (en
Inventor
Paul Johan Ten Dam
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.)
KAEMPFER HANS PETER
Original Assignee
KAEMPFER HANS PETER
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 KAEMPFER HANS PETER filed Critical KAEMPFER HANS PETER
Publication of CA2109137A1 publication Critical patent/CA2109137A1/en
Application granted granted Critical
Publication of CA2109137C publication Critical patent/CA2109137C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/10—Devices controlling or operating blank holders independently, or in conjunction with dies
    • B21D24/14—Devices controlling or operating blank holders independently, or in conjunction with dies pneumatically or hydraulically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/02—Die-cushions

Abstract

A spring device has a first housing partly bounding a first space and a first piston which is movable in substantially sealing manner in axial direction in this first space and which is fixedly connected to a piston rod extending in axial direction which co-acts substantially sealingly with a first continuous hole in an end wall of the housing, which first piston divides the said first space into two chambers. One of the chambers has a number of chamber parts forming a closed contour, mutually connecting in step-like manner and each having an axial peripheral wall, which chamber parts are bounded axially by successive transverse walls and successive axial peripheral walls of increasing axial lengths. The first piston has a corresponding form and a feed conduit for pressure medium debouches into the chamber part of the smallest cross sectional surface area on or close to the transverse wall. A medium drain conduit opens on or close to the relevant transverse wall.
Valve means only unblock the respective medium drain conduits when the relevant chamber part and the adjoining chamber part is wholly or practically wholly blocked by the first piston.
CA002109137A 1992-10-26 1993-10-25 Spring device Expired - Fee Related CA2109137C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL9201857A NL9201857A (en) 1992-10-26 1992-10-26 DEGRESSIVE GAS SPRING.
NL92.01857 1992-10-26

Publications (2)

Publication Number Publication Date
CA2109137A1 true CA2109137A1 (en) 1994-04-27
CA2109137C CA2109137C (en) 1999-07-27

Family

ID=19861427

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002109137A Expired - Fee Related CA2109137C (en) 1992-10-26 1993-10-25 Spring device

Country Status (10)

Country Link
US (1) US5454549A (en)
EP (1) EP0595417B1 (en)
JP (1) JP3816963B2 (en)
KR (1) KR0164439B1 (en)
AT (1) ATE154530T1 (en)
CA (1) CA2109137C (en)
DE (1) DE69311672T2 (en)
ES (1) ES2107613T3 (en)
NL (1) NL9201857A (en)
TW (1) TW227595B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19800661B4 (en) * 1998-01-10 2005-05-19 Burkhard Oest Gas spring with adjustable gas volume
US7152451B1 (en) * 2006-05-26 2006-12-26 Diebolt International, Inc. Reaction device for forming equipment
DE102007005011B4 (en) 2007-02-01 2012-09-06 Saeta Gmbh & Co. Kg Method and drawing tool for deep drawing blanks of sheet metal material to flangeless moldings

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1967245A (en) * 1931-02-20 1934-07-24 American Can Co Art of drawing
US2143429A (en) * 1936-10-14 1939-01-10 Frank Tea & Spice Company Apparatus for forming sheet metal forms
US3267715A (en) * 1961-10-16 1966-08-23 Dro Engineering Company Di Hydraulic control for dies in ram type presses
US3420089A (en) * 1966-02-16 1969-01-07 Mc Donnell Douglas Corp Variable pressure drawpress and method
DE2609916A1 (en) * 1976-03-10 1977-09-15 Etscheid Ohg Hermann HOLD-DOWN DEVICE ON A DEEP DRAWING PRESS
GB1481202A (en) * 1976-03-29 1977-07-27 Metal Box Co Ltd Deep drawing
US4745792A (en) * 1986-10-14 1988-05-24 Aluminum Company Of America Blankholder for a draw press
US4873859A (en) * 1987-02-09 1989-10-17 Redicon Corporation Apparatus for controlling movement in a single action forming press
US4796454A (en) * 1987-02-09 1989-01-10 Redicon Corporation Method for controlling movement in a single action forming press

Also Published As

Publication number Publication date
NL9201857A (en) 1993-10-18
DE69311672T2 (en) 1998-01-08
EP0595417A1 (en) 1994-05-04
US5454549A (en) 1995-10-03
EP0595417B1 (en) 1997-06-18
ES2107613T3 (en) 1997-12-01
CA2109137C (en) 1999-07-27
ATE154530T1 (en) 1997-07-15
DE69311672D1 (en) 1997-07-24
TW227595B (en) 1994-08-01
KR0164439B1 (en) 1999-01-15
KR940008806A (en) 1994-05-16
JP3816963B2 (en) 2006-08-30
JPH06241258A (en) 1994-08-30

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed