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. 23, 1992
Filed:
Sep. 20, 1990
John C Dahlheimer, Laconia, NH (US);
Robert E Doucette, Bristol, NH (US);
Kevin F Ice, Concord, NH (US);
Freudenberg-NOK General Partnership, Plymouth, MI (US);
Abstract
A rotary mechanical face seal utilizes a pair of cup-shaped inserts to closely support the contoured diaphragm of an elastomeric boot whereby the diaphragm does not actively undergo deflection to assist in sealing moving interfaces, even under fluctuations in pressure differentials acting on the diaphragm. A tubular insert is molded into the boot to assure that a fluid tight sealed securement is achieved with a bore to be sealed and accurately position components of the assembly so as to maintain the rotary sliding faces in full contact and compensate for axial tolerances of the components. A washer-shaped insert having raised lands raised from one of its axial faces can be embedded in a seal washer to ensure dimensional stability of a load bearing member and extend service life, the other axial face possibly being used as a portion of the sliding sealing faces.