Stem sealing system for broad temperature ranges

Details Stem sealing system for broad temperature ranges Stem sealing system for broad temperature ranges

1996-03-21

2000-05-16

DePumpo, Daniel G.

Seal for a joint or juncture

Seal between relatively movable parts

Circumferential contact seal for other than piston

277516, 277522, 277531, 277532, 277540, F16J 1506

Patent

active

060625708

ABSTRACT:
A stem seal having first and second wiping members circumjacent a stem is disposed within a bore. A lubricant-bearing ring is disposed about the stem within the bore between the wiping members, under compression therefrom. Projections from the wiping members intrude into the lubrication ring so as to depress the central surface areas thereof. Similar projections are used to center a coil spring against one of these seal members and against an additional seal member. By forming the lubricant ring of open-cell loam or mesh construction, superior lubricant bearing capacities may be achieved.

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Aikin, J.A., "Valve Packing and Live-Loading Improvements", Valve Magazine, Summer 1992, pp. 21-26.

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