Valve stem seal

Details Valve stem seal Valve stem seal

1977-07-06

1978-11-14

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277189, F16J 1532

Patent

active

041252659

ABSTRACT:
A valve stem seal for an intake or exhaust valve in an internal combustion engine where the seal allows a metered amount of oil to run down the valve stem for lubrication of the stem in its valve guide. The seal has a cylindrical wall engaging the valve guide boss and an upper inwardly extendng flange provided with twin sealing lobes on the internal surface separated by an annular groove; the lobes and groove providing a pumping action for oil during reciprocation of the valve stem.

REFERENCES:
patent: 2821973 (1958-02-01), Guhman
patent: 2858150 (1958-10-01), Neher et al.
patent: 2906255 (1959-09-01), Bunce
patent: 3069174 (1962-12-01), Skinner
patent: 3268235 (1966-08-01), Jacobellis et al.
patent: 3498621 (1970-03-01), Wilson
patent: 3563442 (1971-02-01), Kretchman
patent: 3599992 (1971-08-01), Kammeraad
patent: 3601420 (1971-08-01), Binford
patent: 3621952 (1971-11-01), Long
patent: 3910586 (1975-10-01), Todaro
patent: 3920253 (1975-11-01), Bauer

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