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. 10, 2001
Filed:
Sep. 03, 1998
Jon A. Chandler, Powell, OH (US);
Gary B. Drake, Convoy, OH (US);
Stephen J. Carr, Redford, MI (US);
Federal-Mogul World Wide, Inc., Southfield, MI (US);
Abstract
A lip-type fluid seal (,) for a shaft includes a composite sealing lip (,) having an elastomeric portion (,) and a PTFE portion (,). The elastomeric portion (,) includes a lip edge (,) that extends circumferentially continuously to seal the adjacent lip edge (,) of the PTFE portion (,) from any contaminants on the elastomeric side (,) of the seal (,). The PTFE portion (,) has a greater hardness and modulus of elasticity which serves to limit the wear of the elastomeric portion (,) and to induce hydrodynamic surface deformations on the elastomeric lip portion (,) during operation to enhance the exclusion of contaminants. The PTFE lip edge (,) performs well under low temperature and/or low lubricity conditions and its relative hardness protects the elastomeric lip edge from excessive wear.