HYDRAULIC LOCK DEVICE

Title:

HYDRAULIC LOCK DEVICE

Document Type and Number:

WIPO Patent Application WO/2001/071199

Kind Code:

A1

Abstract:

A hydraulic lock device capable of increasing the assured controllability and reliability thereof, reducing the size and increasing the output thereof, and reducing the size and pressure of a hydraulic pressure feeding source, comprising a hydraulic cylinder (4) moving a rod (3) in axial direction, an annular booster (7), pressurizing the oil in an outer peripheral side hydraulic chamber (6), installed in a case member (2), a hydraulic pressure feed port (27), feeding a hydraulic pressure to the hydraulic cylinder (4) and the input oil chamber (16) of the booster (7), installed in the case member (2), a throttle valve (8) provided in a feed oil path leading from the hydraulic pressure feed port (27) to the input oil chamber (16), and a check valve (9), capable of discharging a hydraulic pressure in the input oil chamber (16) and opening when the hydraulic pressure is discharged from the hydraulic pressure feed port, provided in a discharge oil path leading from the input oil chamber (16) to the hydraulic pressure feed port (27).

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Inventors:

KAWAKAMI TAKAYUKI (JP)

Application Number:

PCT/JP2001/002266

Publication Date:

September 27, 2001

Filing Date:

March 21, 2001

Export Citation:

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Assignee:

PASCAL KK (JP)
KAWAKAMI TAKAYUKI (JP)

International Classes:

B23Q1/03; B23Q1/28; B25B5/06; F15B3/00; F15B15/26; (IPC1-7): F15B15/26

Domestic Patent References:

WO2000050777A1

2000-08-31

Foreign References:

JPS62134904U	1987-08-25
DE2338903A1	1974-02-14
DE1901283A1	1970-07-30
US5957443A	1999-09-28
JPH01129035U	1989-09-04

Other References: