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:
Feb. 28, 2006
Filed:
Dec. 17, 2003
Steven G. Bryde, Davisburg, MI (US);
Terrence Christensen, Grand Blanc, MI (US);
Marcos Basile Teixeira, Sao Paulo, BR;
Marcio Caldas Camargo Lima, Sao Paulo, BR;
Antonio Rangel Machado, Sao Paulo, BR;
Marcos Castanho Santanna, Ypsilanti, MI (US);
Steven G. Bryde, Davisburg, MI (US);
Terrence Christensen, Grand Blanc, MI (US);
Marcos Basile Teixeira, Sao Paulo, BR;
Marcio Caldas Camargo Lima, Sao Paulo, BR;
Antonio Rangel Machado, Sao Paulo, BR;
Marcos Castanho Santanna, Ypsilanti, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A radial lip seal including an annular support with a radially extending portion having an inner periphery. An annular seal lip formed of elastomeric material such as polytetrafluoroethylene is connected to the inner periphery. The lip has an inner side adapted to seal a circumferential surface of a shaft and an outer side. The outer side of the lip has a plurality of grooves or protrusions to vary the diameter of the lip. The varied diameter creates a substantial leak between the outer side of the lip and the circumferential surface. The leak created is sufficient to be detected by a low-pressure air test.