Hydraulic system with a cylinder isolation valve

Details Hydraulic system with a cylinder isolation valve Hydraulic system with a cylinder isolation valve

2006-08-02

2008-08-12

Lazo, Thomas E (Department: 3745)

Power plants

Pressure fluid source and motor

Apparatus having means responsive to or ameliorating the...

C091S445000

Reexamination Certificate

active

07409825

ABSTRACT:
A hydraulic system provides failure protection by incorporating an isolator adjacent a hydraulic actuator. The isolator has a first port connected to the hydraulic actuator and a second port with an electrically operated isolation valve connected between those ports. A pressure relief valve responds when pressure in the hydraulic actuator exceeds a given level by relieving pressure thereby enabling the isolation valve to open without application of electricity and release the pressure in the hydraulic actuator. A control valve assembly is remote from the hydraulic actuator and connected to the second port for metering flow of fluid between a source and the hydraulic actuator.

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patent: 1 227 249 (2002-07-01), None
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