Control valve
AssigneeTRW Inc.
InventorJesse L. Culpepper
Life of this patent
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Abstract
A fluid flow control device which incorporates a ring or annulus of resilient material which may be deformed to effect a variable closure with a centrally disposed member, thereby controlling fluid flow through the device. The device is also capable of effecting a "fail-safe" metal-to-metal seal should the resilient element be damaged or a metal-to-metal seal be desired for shutting off flow through the device.
Claims11
A control valve comprising a tubular housing having a fluid flow conduit therethrough, a stationary member centrally disposed within said fluid flow conduit and supported by radially extending vanes, an annular resilient element abutting said housing and at least partially encircling said stationary member, a variable passageway between said stationary member and said resilient element, piston means slidably engaged within said housing, washer means abutting said resilient element and interposed between said resilient element and said piston means, and a control fluid pressure source for operating said piston means to cause said washer means to exert a variable compressive force on said resilient element and thereby deform said resilient element in such manner as to variably restrict said passageway.
A control valve comprising a housing having a fluid flow conduit therethrough, a stationary seat member centrally disposed within said conduit, an annular resilient element encircling said seat member, a variable passageway between said stationary seat member and said resilient element, an annular piston slidable within said housing, washer means abutting said resilient element and interposed between said resilient element and said piston, a rigid annular choke element which when seated against said stationary seat member forms a seal therewith, and a control fluid pressure source for operating said piston, whereby said piston exerts a variable compressive force against said washer means to deform said resilient element and thereby restrict said passageway.
Dependencies are inferred from the claim text.