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:
Apr. 25, 1995
Filed:
Jul. 14, 1993
David Bowers, Bath, ME (US);
Woodex Bearing Company, Inc., Bath, ME (US);
Abstract
A compensating positive drive rotary shaft seal assembly comprises a two-part housing, each housing part including a radially directed stator surface surrounding the shaft. A collar is keyed to the shaft between the stators, and an axially shiftable rotor is interposed between the collar and each stator. The rotors are positively coupled to the collar for rotation with the shaft. An elastomeric annular seal is mounted on the shaft between each rotor and the collar. The housing parts are axially shiftable toward and away from each other adjustably to compress the elastomeric seals and yieldably bias the rotors against the stators. An internal annular gasket spanning the housing parts encompasses the seal assembly and defines a sealed chamber coupled to one or more purge ducts.