Pilot operated valve

Details Pilot operated valve Pilot operated valve

2006-12-12

2006-12-12

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Systems

Sequentially closing and opening alternately seating flow...

C137S596160

Reexamination Certificate

active

07147006

ABSTRACT:
A valve assembly having a fluid switch and a main valve for controlling fluid pressure in a working volume in three control states wherein the main valve has three ports for fluid, flow of fluid through a first port and a second port being controlled by the fluid switch being provided with an electrical signal in a first state or a second state respectively, and flow of fluid through the third port being controlled by alternating the signal, preferably rapidly, between the first and second states.

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International Search Report, Jan. 22, 2003.

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