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:
Oct. 14, 1986
Filed:
Dec. 02, 1985
Gordon T Drygalski, Chicago, IL (US);
Dennis L Otto, Malvern, OH (US);
Donald K Ross, Eastlake, OH (US);
Chicago Rawhide Mfg. Co., Elgin, IL (US);
Abstract
A seal having an exterior seal casing which includes a mounting surface and a seal lip body bonded to a portion of the casing, with the seal lip body comprising annular surfaces defining the air and oil side portions of a primary lip which meet along a generally cylindrical locus of measurable axial extent to provide a primary seal band with a plurality of spaced apart hydrodynamic pumping elements located on this seal band. An auxiliary lip is defined by a pair of frusto-conical surfaces meeting along a generally circular locus to provide an auxiliary or excluder lip portion. Said primary and secondary lips are spaced apart by an annular region of generally V-shaped cross-section, and the primary lip dimension or the pumping elements serve to maintain the primary lip seal band spaced just apart from an associated shaft, at least in the regions of the elements. Said auxiliary lip is of reduced diameter in relation to said seal band dimension in the relaxed condition of the seal.