Valve stem seal

Details Valve stem seal Valve stem seal

1978-09-01

1980-04-15

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

251214, 123188P, F16J 1552

Patent

active

041980620

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 is formed of a relatively rigid valve seal body having a cylindrical wall or skirt engaging the valve guide boss and an upper radially inwardly offset cylindrical wall of a smaller diameter with a radially inwardly extending flange having metering grooves on the upper and lower surfaces thereof, and a resilient insert or collar is positioned on the flange to sealingly engage the reciprocating valve stem; the motion of the collar during reciprocation of the valve stem providing a pumping action through the metering grooves.

REFERENCES:
patent: 2850305 (1958-09-01), Chadowski
patent: 2860615 (1958-11-01), Mayer
patent: 2906255 (1959-09-01), Bunce
patent: 3326562 (1967-06-01), Deuring
patent: 3372941 (1968-03-01), Liebig
patent: 3493236 (1970-02-01), Kleindienst
patent: 3600045 (1968-08-01), Inoue
patent: 3833273 (1974-09-01), Rickley
patent: 3901131 (1975-08-01), Prasse
patent: 4010960 (1977-03-01), Martin
patent: 4078722 (1978-03-01), Luckenbill
patent: 4114059 (1978-09-01), Albaric
patent: 4124220 (1978-11-01), Leone

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