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US 6,659,119 B2Granted
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.
Claims13
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;
- first means interposed between said pistons for facilitating movement of said pistons away from each other in response to fluid pressure or vacuum of predetermined value applied to adjacent or opposite ends, respectively, of the pistons;
- and
- a collapsible member coupled to a selected one of the pistons, wherein the collapsible member initially takes an uncollapsed, rigid state to oppose said movement of the pistons, and wherein the collapsible member subsequently buckles when said predetermined value is reached, thereby allowing the first means to facilitate said movement of the pistons.
2 more elements
A fluid pressure monitoring relief valve actuator, comprising:
- a piston arranged for lateral movement within a housing in response to application of fluid pressure or vacuum to the piston;
- a rotatable shaft coupled to the piston which rotates in response to the lateral movement of the piston;
- and
- a collapsible member supported by the piston, wherein the collapsible member initially takes an uncollapsed, rigid state to oppose the lateral movement of the piston, and wherein the collapsible member subsequently buckles when a predetermined value of the fluid pressure or vacuum is reached, thereby allowing the fluid pressure or vacuum to advance the piston within the housing and induce rotation in the shaft.
1 more element
Dependencies are inferred from the claim text.