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:
Nov. 17, 1981
Filed:
Jun. 16, 1980
James D Symons, Southfield, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A lip-type fluid seal for use with a rotating shaft has a molded seal portion having a cylindrical surface comprised of two elastomeric materials. These elastomeric materials have significantly different elastic modulus values and hardness values. The cylindrical surface on both of the elastomeric materials have an axial projection which are formed during the molding process. During rotation of the shaft, the axial projections deflect to a helical configuration and cooperate with the shaft to form a viscous shear pump. The lower modulus material has a greater helical attitude and therefore increasing pumping action.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile