Valve gasket formed of composite materials and process

Details Valve gasket formed of composite materials and process Valve gasket formed of composite materials and process

1998-05-13

2000-05-02

Chambers, A. Michael

Valves and valve actuation

Valve

Materials

251356, 251357, 137 15, F16K 3102

Patent

active

060562706

ABSTRACT:
A valve gasket includes a main body portion formed of an elastomeric material having a high hardness durometer. The main body portion has recesses located on its opposite sides and at least one opening through the body connecting the recesses. The opposed recesses and the opening are filled with an elastomeric material having a hardness of a lesser durometer, softer than that of the main body portion. At least one of the filled recesses forms a sealing surface of the gasket. In a preferred embodiment both filled recesses form sealing surfaces, one to the seat and one to the stem. In one embodiment the gasket is generally ring-shaped in configuration and the opposed recesses are on opposite sides of the ring and each circumscribe the circumference of the ring.

REFERENCES:
patent: 3531086 (1970-09-01), Shannon
patent: 3775832 (1973-12-01), Werra
patent: 3861646 (1975-01-01), Douglas
patent: 4237010 (1980-12-01), Zimmerly
patent: 4408745 (1983-10-01), Swiers et al.
patent: 4531532 (1985-07-01), Zimmerly
patent: 4628959 (1986-12-01), Parker et al.

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