Title:
油圧式ロック装置
Document Type and Number:
Japanese Patent JP4550213
Kind Code:
B2
Abstract:
To provide a hydraulic lock device that can be designed as a more dependable and reliable device capable of operating at a higher output with a smaller and lower-pressure hydraulic supply source. A hydraulic cylinder (4) is provided for moving a rod (3) in the direction of the axial center; the interior of a casing member (2) is provided with an annular pressure booster (7) for pressurizing the oil in an external hydraulic chamber (6); the casing member (2) is provided with a pressurized oil feed port (27) for feeding pressurized oil to the rod-moving hydraulic cylinder (4) and the input oil chamber (16) of the pressure booster (7); a throttle valve (8) is interposed in an oil supply channel extending from the pressurized oil feed port (27) to the input oil chamber (16); and an oil discharge channel extending from the input oil chamber (16) to the pressurized oil feed port (27) is provided with a nonreturn valve capable of discharging pressurized oil from the input oil chamber (16), with the nonreturn valve (9) being opened when the pressurized oil is discharged through the pressurized oil feed port.
Inventors:
Takayuki Kawakami
Application Number:
JP2000084112A
Publication Date:
September 22, 2010
Filing Date:
March 24, 2000
Export Citation:
Assignee:
PASCAL ENGINEERING CORPORATION
International Classes:
F15B15/26; B23Q1/03; B23Q1/28; B25B5/06; F15B3/00
Domestic Patent References:
| JP6047710U | ||||
| JP62134904U | ||||
| JP54030374A | ||||
| JP55161107U | ||||
| JP4048405U | ||||
| JP1129035U | ||||
| JP58024504U | ||||
| JP2000240611A | ||||
| JP60167620U | ||||
| JP59128902U | ||||
| JP60132106A |
Foreign References:
| US5957443 |
Attorney, Agent or Firm:
Toshio Okamura