Sliding stem seal, particularly for valve stems

Details Sliding stem seal, particularly for valve stems Sliding stem seal, particularly for valve stems

1989-11-02

1991-02-19

Cross, E. Rollins

Internal-combustion engines

Valve

Valve head cooperates with manifold

277 95, 123188R, F01L 300

Patent

active

049933795

ABSTRACT:
A seal for the stem of an internal combustion engine intake or exhaust valve; which seal presents a first portion mounted integral with an element supporting the stem; and a second portion inside which are formed two annular lips cooperating in contacting manner with the stem and defining, together and with the stem, an annular chamber inside which part of the lubricating oil supplied when the engine is running is trapped when the engine is idle, thus preventing the sealing lips from drying and sticking to the valve stem.

REFERENCES:
patent: 4531483 (1985-07-01), Vossieck et al.

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