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:
Aug. 01, 1978
Filed:
Apr. 19, 1976
Donald J McDowell, Riverside, IL (US);
Felt Products Mfg. Co., Skokie, IL (US);
Abstract
A multilayer engine gasket is provided for resisting scoring, scratching and fretting corrosion. The gasket includes a metal core or substrate, an intermediate phosphate layer and an exterior layer of anti-fretting material. The metal core is preferably formed of steel and is constructed and arranged to be mounted between an engine head and block of an internal combustion engine, such as a diesel engine. A pair of piston-size apertures and a plurality of oil and water passageways are defined in the metal core. The intermediate phosphate layer enhances the ability of the anti-fretting material to adhere to the gasket and provides and assists in resisting anti-fretting corrosion. The exterior layer of anti-fretting material is formulated from a ratio of from about 65 per cent to about 35 per cent polytetrafluoroethylene to a ratio from about 35 per cent to about 65 per cent molybdenum disulfide by weight. A separately screened-on silicone bead may optionally border the peripheral edges of the metal core so as to provide a peripheral seal.