Title:
LOCK RELEASING DEVICE FOR SERVO VALVE IN HYDRAULICALLY ACTUATED DEVICE
Document Type and Number:
Japanese Patent JP3131893
Kind Code:
B2
Abstract:
PURPOSE: To make a lock releasing device capable of releasing a locked state before a servo valve is operated, by utilizing the output oil pressure of a master cylinder, when a spool valve is locked at its closure by the pressure difference between an intake port and an exhaust port, in the servo valve composed of an electrical actuator and a spool valve.
CONSTITUTION: A valve casing 25 for a spool valve 22 comprises an operating fluid chamber 29 faced by the upper end surface of a valve body 23, an output chamber 34 communicating with the operating fluid chamber 29, and pressurized by a piston 35 advancing in response to the output oil pressure of a master cylinder M, a valve means 31 for releasing the output chamber 34 to a reservoir 11, after the valve body 23 is forcibly moved by a minute displacement by a pressure increase in the operating fluid chamber 29.
Inventors:
Ryoji Yamazaki
Application Number:
JP14748494A
Publication Date:
February 05, 2001
Filing Date:
June 29, 1994
Export Citation:
Assignee:
Nissin Industry Co., Ltd.
International Classes:
B60T13/66; B60T13/12; B60T15/36; F16K31/06; (IPC1-7): B60T15/36; B60T13/12; F16K31/06
Domestic Patent References:
| JP7317941A | ||||
| JP7277177A | ||||
| JP7217764A | ||||
| JP7205801A | ||||
| JP7158609A | ||||
| JP76579U |
Attorney, Agent or Firm:
Ken Ochiai (1 person outside)