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. 07, 2001
Filed:
Sep. 14, 1999
Applicant:
Inventor:
Timothy A. Hegemier, Avilla, IN (US);
Assignee:
Dana Corporation, Toledo, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02F 1/100 ; F16J 3/00 ; F16J 1/512 ; F16L 9/14 ;
U.S. Cl.
CPC ...
F02F 1/100 ; F16J 3/00 ; F16J 1/512 ; F16L 9/14 ;
Abstract
A coextruded valve stem seal is provided that includes a sleeve having an upper and lower portion, a central vertical axis, and a generally concentric aperture. The sleeve includes an inner layer an inner layer of a resilient sealing material, such as a rubber, and an outer layer of a coextrudable rigid material, such as a plastic material. The lower portion of a preferred embodiment of the sleeve may include a radially extending flange. A method for making the valve stem seal in accordance with the principles of the invention is also disclosed.