Title:
DRIVE DEVICE FOR HYDRAULIC CYLINDER
Document Type and Number:
WIPO Patent Application WO/2020/054323
Kind Code:
A1
Abstract:
Provided is a drive device (120) for a double-acting hydraulic cylinder (10) having an auxiliary mechanism part (lock mechanism part (35A)) that operates during a return operation by means of air pressure, said drive device (120) for a double-acting hydraulic cylinder (10) comprising a switch valve (102), a high-pressure air supply source (104), an exhaust port (106), and a check valve (86). When the switch valve (102) is in a second position one cylinder chamber (first pressure chamber (38)) communicates with another cylinder chamber (fourth pressure chamber (44)) via the check valve (86) and the one cylinder chamber (first pressure chamber (38)) communicates with the exhaust port (106), and the auxiliary mechanism part (lock mechanism part (35A)) communicates with the high-pressure air supply source (104).
Inventors:
TAKADA YOSHIYUKI (JP)
TAKAKUWA YOUJI (JP)
MONDEN KENGO (JP)
NAGURA SEIICHI (JP)
SOMEYA KAZUTAKA (JP)
KAZAMA AKIHIRO (JP)
TAKAKUWA YOUJI (JP)
MONDEN KENGO (JP)
NAGURA SEIICHI (JP)
SOMEYA KAZUTAKA (JP)
KAZAMA AKIHIRO (JP)
Application Number:
PCT/JP2019/032238
Publication Date:
March 19, 2020
Filing Date:
August 19, 2019
Export Citation:
Assignee:
SMC CORP (JP)
International Classes:
F15B11/028; F15B11/024; F15B15/22; F15B15/26
Foreign References:
| JP2003336605A | 2003-11-28 | |||
| JP2018054117A | 2018-04-05 | |||
| JPH05164111A | 1993-06-29 | |||
| JP2018054118A | 2018-04-05 | |||
| JPH0842511A | 1996-02-13 | |||
| JPH074903U | 1995-01-24 | |||
| JPS5773403U | 1982-05-06 | |||
| JPH0642507A | 1994-02-15 | |||
| JPH10267002A | 1998-10-06 |
Attorney, Agent or Firm:
CHIBA Yoshihiro et al. (JP)
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