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:
Sep. 03, 1991
Filed:
Aug. 29, 1990
Applicant:
Inventors:
Assignee:
Firma Carl Freudenberg, Weinheim, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277134 ; 277133 ; 277153 ;
Abstract
An annular seal in which a sealing lip of polymeric material is urged under resilient bias against a cylindrical surface of a shaft. The cylindrical surface is provided with saucer-like indentations. The maximum depth of the indentations amounts to 4 to 12 micrometers, and each indentation is surrounded on its entire periphery by adjacent indentations. The distance between centers of the indentations is so small that the adjacent indentations merge with one another to form arrises.