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:
Jun. 14, 2011
Filed:
Jun. 11, 2009
Frederick R. Hatch, Ann Arbor, MI (US);
Frederick R. Hatch, Ann Arbor, MI (US);
Federal Mogul Corporation, Southfield, MI (US);
Abstract
A method of constructing a shaft seal assembly includes attaching a PTFE seal element to an outer metal case and disposing a bore of the PTFE seal element onto a mandrel. Then, heating the PTFE seal element while on the mandrel. Further, cooling the PTFE seal element while on the mandrel and, removing the shaft seal assembly from the mandrel. The resulting seal element provides a reliable seal against a running surface of a shaft in use, while at the same time producing low running torque against the running surface of the shaft. Further, a minimal axial push force is required to install the shaft seal assembly onto the shaft, thereby reducing the potential of damage to the seal element or inversion of the seal element during installation.