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US 2003/0111110 A1Published application
Fluid pressure responsive dual piston or emergency shutdown valve actuator
AssigneeTaylor Innovations, L.L.C.
InventorJulian S. Taylor
Life of this patent
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Abstract
This valve actuator is formed by a pair of pistons in a sleeve valve body fluid pressure or vacuum moved away from each other for angularly rotating a shaft, transversely journaled by the body, in a predetermined direction and opening or closing a fluid control valve to protect a fluid system.
Claims2
A fluid pressure monitoring relief valve actuator, comprising:
- a sleeve-like body closed at both ends and having wall ports respectively communicating with both ends and an intermediate portion of said body;
- opposing pistons in said body for sliding movement toward and away from each other;
- and,
- pinion means interposed between said pistons for movement away from each other in response to fluid pressure or vacuum of predetermined value applied to adjacent or opposite ends, respectively, of the pistons.
1 more element
Dependencies are inferred from the claim text.