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:
Mar. 20, 1990
Filed:
Jun. 30, 1989
J Dudley Binford, Richmond, IN (US);
Philip L Bond, Richmond, IN (US);
David F Fiedler, Richmond, IN (US);
Ivan J Bruns, Richmond, IN (US);
Dana Corporation, Toledo, OH (US);
Abstract
A valve stem seal assembly includes a rigid cylindrical shell and an annular resilient seal body contained entirely within the shell. Integral to the seal body is a frustoconical sealing element adapted to engage a valve guide of an internal combustion engine. The sealing element converges radially inwardly, and upon installation of the assembly on a valve guide the outer surface of the sealing element bends further radially inwardly to effectively seal the top surface of the guide. The seal body includes a stem sealing aperture, which in one preferred embodiment is designed to engage the valve stem without a spring. In a same or similar embodiment, the shell contains a circumferential array of tangs for retention of the assembly on the guide.