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:
Dec. 21, 1993
Filed:
Dec. 21, 1992
Applicant:
Inventors:
Ulrich Dahlhaus, Edingen, DE;
Rolf Vogt, Oftersheim, DE;
Assignee:
Firma Carl Freudenberg, Weinheim/Bergstr, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J / ;
U.S. Cl.
CPC ...
277 23 ; 277 24 ; 277134 ; 277152 ; 277153 ;
Abstract
A radial shaft sealing ring has a filtering device which is disposed upstream of main seal. The filtering device comprises a sealing lip 3 which surrounds the shaft to be sealed with a cylindrical surface 5 spaced radially apart at a distance D, this gap being of a capillary narrowness. On the axial end facing chamber A to be sealed, the cylindrical surface 5 is bounded by a conical surface 10 which encloses a conical angle of 60 to 120 degrees.