EP0251024A3 - Hydraulic element and drawing tool equipped with it - Google Patents

Hydraulic element and drawing tool equipped with it Download PDF

Info

Publication number
EP0251024A3
EP0251024A3 EP87108650A EP87108650A EP0251024A3 EP 0251024 A3 EP0251024 A3 EP 0251024A3 EP 87108650 A EP87108650 A EP 87108650A EP 87108650 A EP87108650 A EP 87108650A EP 0251024 A3 EP0251024 A3 EP 0251024A3
Authority
EP
European Patent Office
Prior art keywords
cylinder chamber
axis
along
hydraulic medium
hydraulic element
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
EP87108650A
Other languages
German (de)
Other versions
EP0251024A2 (en
EP0251024B1 (en
Inventor
Erhard Reitter
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT87108650T priority Critical patent/ATE56166T1/en
Publication of EP0251024A2 publication Critical patent/EP0251024A2/en
Publication of EP0251024A3 publication Critical patent/EP0251024A3/en
Application granted granted Critical
Publication of EP0251024B1 publication Critical patent/EP0251024B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Gripping On Spindles (AREA)
  • Actuator (AREA)
  • Pens And Brushes (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Lubricants (AREA)

Abstract

A hydraulic element including a working cylinder defining a cylinder chamber having an axis and containing hydraulic medium, a working piston movable in the cylinder chamber along the axis and having an interior end arranged to communicate with the hydraulic medium in the cylinder chamber, and an annular piston movable in the cylinder chamber, along the axis, and enclosing the working piston, the annular piston having an interior end communicating with the hydraulic medium in the cylinder chamber so that movement of one of the pistons in a first direction along the axis causes the other of the pistons to move in a second direction opposite to the first direction.
EP87108650A 1986-06-21 1987-06-16 Drawing tool Expired - Lifetime EP0251024B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87108650T ATE56166T1 (en) 1986-06-21 1987-06-16 PULLING TOOL.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863620876 DE3620876A1 (en) 1986-06-21 1986-06-21 HYDRAULIC ELEMENT AND DRAWING TOOL ASSEMBLED WITH IT
DE3620876 1986-06-21

Publications (3)

Publication Number Publication Date
EP0251024A2 EP0251024A2 (en) 1988-01-07
EP0251024A3 true EP0251024A3 (en) 1988-08-17
EP0251024B1 EP0251024B1 (en) 1990-09-05

Family

ID=6303447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87108650A Expired - Lifetime EP0251024B1 (en) 1986-06-21 1987-06-16 Drawing tool

Country Status (5)

Country Link
US (1) US4796453A (en)
EP (1) EP0251024B1 (en)
JP (1) JPS632522A (en)
AT (1) ATE56166T1 (en)
DE (2) DE3620876A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3907702A1 (en) * 1988-03-12 1989-09-21 Karl Hehl Drawing tool for forming sheets
DE58904930D1 (en) * 1988-03-12 1993-08-26 Karl Hehl DRAWING TOOL FOR FORMING SHEETS.
JP7403794B2 (en) * 2019-11-07 2023-12-25 太陽工業株式会社 Double acting press mold
JP7230866B2 (en) * 2020-03-02 2023-03-01 トヨタ車体株式会社 press mold

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2609775A (en) * 1949-06-14 1952-09-09 Production Tool & Die Co Inc Hydraulic die
DE3333687A1 (en) * 1983-09-17 1985-03-28 Uniplanung Metall- und Kunststoffengineering GmbH & Co KG, 7552 Durmersheim Device on tools or presses for drawing sheet-metal shaped parts
DE3424262A1 (en) * 1984-06-30 1986-01-09 Uniplanung Metall- und Kunststoffengineering GmbH & Co KG, 7552 Durmersheim Method for drawing sheet-metal shaped parts and a device on drawing tools or drawing presses for carrying out the method

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3751962A (en) * 1970-11-06 1973-08-14 Reynolds Metals Co Method and apparatus for making a drawn article
SE414527B (en) * 1978-11-07 1980-08-04 Volvo Ab CYLINDER WITH TWICE STEP, SPECIFICALLY A SWEAT CYLINDER
DE2948396A1 (en) * 1979-12-01 1981-07-02 Uniplanung Metall- Und Kunststoffengineering Gmbh & Co Kg, 7555 Bietigheim TOOLING, IN PARTICULAR DRAWING TOOL WITH FIXED DRAWING STAMP IN THE TOOL BOTTOM
US4530224A (en) * 1980-07-12 1985-07-23 Sms Schloemann-Siemag Ag Strip-guide assembly for a metal strip coiler
DE8105898U1 (en) * 1981-03-02 1982-04-08 Leibfried Maschinenbau Gmbh, 7033 Herrenberg Piston-cylinder unit
CH665007A5 (en) * 1984-05-11 1988-04-15 Enfo Grundlagen Forschungs Ag HYDRAULIC CYLINDER WITH POWER MULTIPLICATION.
JPS61139828A (en) * 1984-12-12 1986-06-27 Toshiba Corp Language input device
DE8600823U1 (en) * 1986-01-15 1986-03-06 Brauer GmbH & Co, 4150 Krefeld Equal speed telescopic cylinder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2609775A (en) * 1949-06-14 1952-09-09 Production Tool & Die Co Inc Hydraulic die
DE3333687A1 (en) * 1983-09-17 1985-03-28 Uniplanung Metall- und Kunststoffengineering GmbH & Co KG, 7552 Durmersheim Device on tools or presses for drawing sheet-metal shaped parts
DE3424262A1 (en) * 1984-06-30 1986-01-09 Uniplanung Metall- und Kunststoffengineering GmbH & Co KG, 7552 Durmersheim Method for drawing sheet-metal shaped parts and a device on drawing tools or drawing presses for carrying out the method

Also Published As

Publication number Publication date
DE3620876A1 (en) 1987-12-23
EP0251024A2 (en) 1988-01-07
ATE56166T1 (en) 1990-09-15
JPS632522A (en) 1988-01-07
DE3764728D1 (en) 1990-10-11
US4796453A (en) 1989-01-10
DE3620876C2 (en) 1992-04-23
EP0251024B1 (en) 1990-09-05

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