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. 25, 2002
Filed:
May. 31, 2000
Applicant:
Inventor:
David E. Johnston, East Hebron, NH (US);
Assignee:
Freudenberg-Nok General Partnership, Plymouth, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J 1/532 ;
U.S. Cl.
CPC ...
F16J 1/532 ;
Abstract
A radial shaft seal with a membrane is disclosed. The surface of the membrane is in sealing contact with the shaft. A plurality of inclined waves are formed in the surface in response to shear stresses formed by movement of one of the support rings relative to the other. The inclined waves are generally elliptical in shape and form an undulating surface. The direction of the inclined waves can be changed in response to shaft rotation.