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:
Nov. 17, 2005
Applicant:
John C. Dahlheimer, Laconia, NH (US);
Inventor:
John C. Dahlheimer, Laconia, NH (US);
Assignee:
Freudenberg-NOK General Partnership, Plymouth, MI (US);
Primary Examiner:
Int. Cl.
CPC ...
F16J 15/34 (2006.01); F16J 15/38 (2006.01);
U.S. Cl.
CPC ...
Abstract
A face seal is provided with a constriction ring around a rubber boot that constricts the normal outward bulging of the flex section of the rubber boot as it folds and tries to roll forward over itself during axial deflection. The constriction caused by the constriction ring provides for increased frictional hysteresis during compression and decompression of the boot flex section. This increased hysteresis increases the dampening capacity of the seal design and, therefore, reduces undesired vibrations and seal noise generation.