Valve spring retainer stem oil shield

Details Valve spring retainer stem oil shield Valve spring retainer stem oil shield

1994-11-22

1996-05-14

Lo, Weilun

Internal-combustion engines

Poppet valve operating mechanism

Lubrication

1231886, 1231889, 251337, F01M 910, F16K 4100

Patent

active

055158218

ABSTRACT:
A method and apparatus for inhibiting leakage of lubricating oil into an intake manifold and cylinder of a diesel engine during idling incorporates a seal press fit onto one end of an intake valve stem adjacent a tappet assembly coupled in driving relationship with the valve. In an illustrative form the seal comprises an annular ring sized to the valve stem and having a flexible, circumferential flange adapted for sealing engagement with a valve spring retainer attached to the valve. The flange of the seal engages an inner annular, chamfered surface on the valve spring retainer, the chamfered surface being located adjacent the one end of the valve stem.

REFERENCES:
patent: 2732836 (1956-01-01), Phillips
patent: 2759466 (1956-08-01), Heimbuch
patent: 2844134 (1958-07-01), Sietman
patent: 2855915 (1958-10-01), Norton
patent: 3043284 (1962-07-01), Gundstorm

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