F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
F15B 13/04 (2006.01) F15B 20/00 (2006.01)
Patent
CA 2290175
A fluid control valve system for controlling the flow of hydraulic fluid supplied to and discharged out of an actuator having first and second actuator ports, comprising: a valve housing having a pressure sensing chamber for sensing the pressure of the hydraulic fluid introduced therein and a pressure port for introducing a hydraulic fluid; a valve spool axially movably received in the valve housing; valve spool operating means having the valve spool axially moved and including a force motor, a piston rod having the valve spool slidably received thereon and driven by the force motor, and a fined piston firmly connected with the piston rod; and resiliently urging means for resiliently urging the valve spool along the center axis of the valve housing, the valve spool being urged by the hydraulic pressure of the hydraulic fluid in the pressure sensing chamber and the resiliently urging means to assume operation positions consisting of normal operation positions where the hydraulic pressure of the hydraulic fluid in the pressure sensing chamber is larger than the resilient force of the resiliently urging means to have the valve spool axially moved together with the piston rod of the valve spool operating means and an abnormal operation position where the hydraulic pressure in the pressure sensing chamber is reduced until the resiliently urging means starts to urge and axially move the valve spool toward the fixed piston to have the valve spool brought into contact with the fixed piston with the pressure port being held out of communication with the first and second actuator ports of the actuator.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Teijin Seiki Co. Ltd.
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