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:
Jul. 24, 1990
Filed:
Jul. 10, 1989
Applicant:
Inventors:
Frederick R Hatch, Ann Arbor, MI (US);
William M Riley, Milan, MI (US);
Thomas M Banks, Ypsilanti, MI (US);
Assignee:
Mather Seal Company, Milan, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ; F16J / ; F16J / ; F16J / ;
U.S. Cl.
CPC ...
277 23 ; 277 38 ; 277 47 ; 277 53 ; 277 56 ; 277 58 ; 277 65 ; 277 95 ; 277134 ; 277152 ; 277153 ;
Abstract
A static dirt exclusion element is arranged in a unitized housing to contact a rotating exclusion element so as to provide a primary barrier to dust and airborne contaminants. A secondary barrier is provided in the housing in the form of a porous filter element formed of a foam or felted material to further exclude and entrap contaminants.