Valve stem seal with multiple ring means

Details Valve stem seal with multiple ring means Valve stem seal with multiple ring means

1985-09-10

1986-03-25

Ward, Robert S.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277112, 277125, 277188A, 277901, 277DIG6, 251214, 251368, F16J 1506, F16J 1530, F16K 4104

Patent

active

045778728

ABSTRACT:
A seat for a valve stem comprised of two spaced rings of carbon fiber coated with a dispersion of polytetrafluoroethylene between which is interposed a ring of polytetrafluoroethylene.

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patent: 4406469 (1983-09-01), Allison
patent: 4408767 (1983-10-01), Kako
patent: 4443517 (1984-04-01), Shah

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