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:
May. 29, 2012
Filed:
Feb. 20, 2007
Nikhil R. Baxi, Cordova, TN (US);
John K. Nichols, Oxford, MS (US);
William P. Yetter, Chula Vista, CA (US);
Daniel D. Labrenz, Chula Vista, CA (US);
Nikhil R. Baxi, Cordova, TN (US);
John K. Nichols, Oxford, MS (US);
William P. Yetter, Chula Vista, CA (US);
Daniel D. Labrenz, Chula Vista, CA (US);
Parker-Hannifin Corporation, Cleveland, OH (US);
Abstract
A seal and coupling, wherein the seal has a thin profile including a primary sealing element that provides both a face and radial seal, and a secondary or backup sealing element that provides a face seal. The secondary or backup sealing element seals against leakage past or through the primary sealing element, and the retainer may be made of a fluid impervious material for blocking permeation of fluid from the primary to the secondary seal. The retainer may also function to prevent over-compression of the sealing elements, while also maintaining a radial spacing between the sealing elements.