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. 11, 1985
Filed:
Oct. 01, 1984
Applicant:
Inventor:
Thomas J Burgan, Homewood, IL (US);
Assignee:
Chicago Rawhide Mfg. Co., Elgin, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F16J / ; F16J / ;
U.S. Cl.
CPC ...
277134 ; 277153 ;
Abstract
A pumping seal having an elastomeric hydrodynamic primary lip and a resinous fluorocarbon auxiliary lip. The auxiliary lip is of completely or partially frusto-conical form in at least one portion so as to provide desirable venting geometry. Said auxiliary lip is bonded to a portion of the primary seal lip adjacent the area at which the primary lip is bonded to the casing of the seal. The seal provides a strong pumping action without providing the potential for drawing a measurable vacuum in the inter-lip area.