Valve and valve sealing member

Valves and valve actuation – With means to increase head and seat contact pressure – Seat pressed to valve

Patent

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Details

251306, 277200, F16K 1228

Patent

active

045139466

ABSTRACT:
There is disclosed a novel sealing member and arrangement for a valve of the type including a valve body having a fluid passage therethrough and a flow control member movably supported relative to the body for opening and closing the flow passage, such as found in a ball or butterfly type of valve constructions. The valve body and flow control member include, respectively, an annular sealing surface and an annular sealing member support groove or channel confronting the sealing surface and having an annular sealing member disposed therein. The sealing member includes an anchoring portion held between opposed sidewalls of the support groove, and a convoluted portion extending radially inwardly of the anchoring portion, with a sealing portion carried thereby, and designed to extend beyond the groove, for engagement with the sealing surface. The groove sidewalls are of slightly greater axial width than the sealing member to permit limited elastic axial deflection. The convoluted structure also permits a slight elastic radial movement of the sealing member where necessary in order to permit the sealing member to adjust its radial position to achieve proper alignment with the sealing surface. In one embodiment, the convoluted portion, in cross section, is generally of decreasing thickness, in the direction of the sealing surface, thereby simulating a beam of uniform stress. This shape permits axial deflection while encouraging a generally uniform distribution of stress throughout the convoluted portion during axial flexing thereof upon engagement with the sealing surface, substantially preventing detrimental permanent deformation of the sealing member.

REFERENCES:
patent: 3210107 (1965-10-01), Flumerfelt
patent: 3666236 (1972-05-01), Gachot
patent: 3830083 (1974-08-01), Hadick et al.
patent: 4195815 (1980-04-01), Stager
patent: 4210313 (1980-07-01), Chester
patent: 4269391 (1981-05-01), Saito et al.
patent: 4278262 (1981-07-01), Mizutani et al.
patent: 4281817 (1981-08-01), Adams et al.

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