US 4,744,572 AGranted

All-metal, valve sealing mechanism

AssigneePosi-Seal International, Inc.

InventorsBahman Sahba, Harry C. Champlin, Jr., John M. Cory

Life of this patent

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Abstract

A sealing mechanism capable of use in a valve subject to extended temperatures and pressures. The sealing mechanism comprises a seal ring positioned within a groove circumferential with respect to the passageway of the valve. A convex seating portion of the seal ring extends through an annular opening in the groove, for sealing engagement with a closure member. Shoulder portions, which extend from the sides of the seating portion, abut the sidewalls of the groove. The seal ring is compressed in width within the groove, so that a resilient side-sealing force is imparted to the contact of the shoulder portions with the sidewalls of the groove. Substantially leak proof sealing is achieved, which is maintained even in the event of high temperature conditions or fire.

Claims27

Dependent claims

A sealing mechanism capable of use in a valve subject to extend temperatures and pressures, comprising a metal seal ring adapted to fit within an undercut groove, circumferential to the passageway of said valve, said groove having means defining an opening between opposed sides, said sides spaced apart by a distance greater than the width of said opening;

said metal seal ring comprising a convex seating portion adapted to extend through said opening for engagement with a complementary sealing surface of a closure member, said convex seating portion integrally joined at the sides thereof to one end of each of a pair of lateral shoulder portions, said shoulder portions adapted for contact with the sides of said groove, and wherein said metal ring is resiliently compressed in width while being held in said groove, so that a side-sealing force is imparted to said contact with the sides of said groove, and wherein a bearing force is exerted between said seating portion of said seal ring and said sealing surface of said closure member when the latter is in the closed position so that essentially no leakage occurs;
wherein the other end of each of said pair of shoulder portions is integrally joined to a back portion, wherein said metal seal ring defines a toroidal cavity, and whereby when the closure member is in the closed position, said back portion is pressed against the base of said circumferential groove, such that said seal ring is compressed in the radial direction and in a spring-like manner exerts a force in counteraction to the radial force exerted by said closure member against said seating portion of said seal ring;
and
wherein when said closure member is in the closed position, said seal ring is radially compressed in proportion to said bearing forces whereby said side-sealing force is correspondingly increased.

1 more element

A sealing mechanism, comprising a metal seal ring adapted to fit within an undercut groove, circumferential to the passageway of a valve, said groove having means defining an opening between opposed sides, said sides spaced apart by a distance greater than the width of said opening;

said metal seal ring comprising a convex seating portion adapted to extend through said opening for engagement with a complementary sealing surface of a closure member, said convex seating portion integrally joined at the sides thereof to one end of each of a pair of lateral shoulder portions, said shoulder portions adapted for contact with the sides of said groove, and wherein said metal ring is resiliently compressed in width while being held in said groove, so that a side-sealing force is imparted to said contact with the sides of said groove, and wherein a bearing force is exerted between said seating portion of said seal ring and said sealing surface of said closure member when the latter is in the closed position so that essentially no leakage occurs;
wherein the other end of at least one of said pair of shoulder portions is integrally joined to a back portion, wherein said metal seal ring defines a toroidal cavity, wherein said convex seating portion comprises a plurality of protuberances convex with respect to the base of said groove, and whereby when the closure member is in the closed position, said seal ring is compressed in the radial direction and in a spring-like manner exerts a force in counteraction to the radial force exerted by said closure member against said seating portion of said seal ring.

Dependencies are inferred from the claim text.

Facts

Application: 07/073,401Filed 14 Jul 1987 · continuation
Priority: 13 Jul 1983
Granted: 17 May 1988
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F16K 5/0673
Packings: composite packings
F16K 1/2266
The sealing being arranged on the valve seat: and being forced into sealing contact with the valve member by a spring or a spring-like member
Y10S 277/941
Containing metal: aluminum or copper
Y10S 277/942
Containing metal: silver or gold