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. 07, 2008
Filed:
Jan. 14, 2004
Applicant:
John Dahlheimer, Laconia, NH (US);
Inventor:
John Dahlheimer, Laconia, NH (US);
Assignee:
Freudenberg-NOK General Partnership, Plymouth, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16J 15/34 (2006.01); F16J 15/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
A mechanical face seal, for sealing about a rotating shaft, includes a seal head assembly in sealing engagement with a seal seat assembly. The seal seat assembly has a washer with a portion that is sandwiched between a grommet and a seal seat. Another portion of the washer is sandwiched between a sleeve or shoulder on the shaft and an impeller. Frictional heat generated by the seal can be conducted away from the seal seat to the sleeve or shoulder on the shaft, which is particularly advantageous when the face seal is operated without water adjacent to the seal seat.