The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 15, 1980
Filed:
Sep. 01, 1978
Anthony J Grzesiak, Burnham, IL (US);
Borg-Warner Corporation, Chicago, IL (US);
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.