JPS5772731A - Oil pressure puncher - Google Patents

Oil pressure puncher

Info

Publication number
JPS5772731A
JPS5772731A JP55147896A JP14789680A JPS5772731A JP S5772731 A JPS5772731 A JP S5772731A JP 55147896 A JP55147896 A JP 55147896A JP 14789680 A JP14789680 A JP 14789680A JP S5772731 A JPS5772731 A JP S5772731A
Authority
JP
Japan
Prior art keywords
chamber
piston
oil
pressure oil
oil tank
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
JP55147896A
Other languages
Japanese (ja)
Other versions
JPS592566B2 (en
Inventor
Masamitsu Ishihara
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 JP55147896A priority Critical patent/JPS592566B2/en
Priority to IT22563/81A priority patent/IT1137934B/en
Priority to DE19813125810 priority patent/DE3125810A1/en
Publication of JPS5772731A publication Critical patent/JPS5772731A/en
Publication of JPS592566B2 publication Critical patent/JPS592566B2/en
Expired 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/002—Drive of the tools

Abstract

PURPOSE: To make the structure simple and reduce size by supplying pressure oil to the first chamber out of the first and second chambers divided by a piston head and communicating the second chamber to an oil tank with a passage that is used as a throttle valve, and providing a piston returning spring.
CONSTITUTION: This oil pressure puncher supplies pressure oil from an oil tank 16 to a cylinder 18, and makes punching with a punch at the tip of a piston 19 moving the piston in the cylinder 18. Out of the first and second chambers 22, 23, divided by a piston head 20, the first chamber 22 is so made that pressure oil can be fed to it. At the same time, the second chamber 23 is communicated always to the oil tank 16 through a passage 32 that also works as a throttle valve. The second chamber 23 is filled with pressure oil, and a spring 34 for returning the piston is provided in the second chamber 23.
COPYRIGHT: (C)1982,JPO&Japio
JP55147896A 1980-10-22 1980-10-22 hydraulic puncher Expired JPS592566B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP55147896A JPS592566B2 (en) 1980-10-22 1980-10-22 hydraulic puncher
IT22563/81A IT1137934B (en) 1980-10-22 1981-06-25 HYDRAULICALLY OPERATED PUNCHING MACHINE
DE19813125810 DE3125810A1 (en) 1980-10-22 1981-06-30 Hydraulically actuated punching machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55147896A JPS592566B2 (en) 1980-10-22 1980-10-22 hydraulic puncher

Publications (2)

Publication Number Publication Date
JPS5772731A true JPS5772731A (en) 1982-05-07
JPS592566B2 JPS592566B2 (en) 1984-01-19

Family

ID=15440598

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55147896A Expired JPS592566B2 (en) 1980-10-22 1980-10-22 hydraulic puncher

Country Status (3)

Country Link
JP (1) JPS592566B2 (en)
DE (1) DE3125810A1 (en)
IT (1) IT1137934B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6272727U (en) * 1985-10-26 1987-05-09

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5150644A (en) * 1990-04-17 1992-09-29 Kabushiku Kasisha Ogura Release valve mechanism in a fluid operated linear actuator for a portable cutter or the like
DE9210406U1 (en) * 1992-08-04 1993-12-02 Lai Xiao Wei Hand tool with hydraulic drive
DE4423049A1 (en) * 1994-07-03 1995-01-19 Lai Xiao Wei Variable-power, multi-purpose hydraulic device, as a hand tool, capable of both drawing and pressing, of the central-pin type (and concentric double-piston type)
JP3792307B2 (en) * 1996-08-26 2006-07-05 株式会社オグラ Hydraulic actuator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6272727U (en) * 1985-10-26 1987-05-09

Also Published As

Publication number Publication date
DE3125810A1 (en) 1982-05-19
IT1137934B (en) 1986-09-10
IT8122563A0 (en) 1981-06-25
JPS592566B2 (en) 1984-01-19

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