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:
Dec. 31, 2013
Filed:
Jul. 01, 2009
Christopher R. Mclean, Vancouver, CA;
Michel P. Leblanc, Vancouver, CA;
Michael J. Mckerrow, Delta, CA;
Bowie G. Keefer, Vancouver, CA;
Xiang LU Kong, Calgary, CA;
Alan O. Lebeck, Albuquerque, NM (US);
Christopher R. McLean, Vancouver, CA;
Michel P. LeBlanc, Vancouver, CA;
Michael J. McKerrow, Delta, CA;
Bowie G. Keefer, Vancouver, CA;
Xiang Lu Kong, Calgary, CA;
Alan O. Lebeck, Albuquerque, NM (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
A typical rotary face seal employs a seal ring rotating relative to a sealing surface and also employs means to urge the seal ring towards the sealing surface in order to effect a seal. The seal ring may itself comprise a seal face bonded to a backing ring. In certain applications, the seal face may deform significantly as a result of the temperature variations experienced and an undesirable crowning of the seal face may occur. Such crowning may be reduced by employing an improved seal ring with anti-crowning features in which the thickness of an edge of the seal face is different from that in the middle of the seal face, or in which a relief slot is employed in the seal face. The improved seal ring is particularly suited for rotary face seals used in a rotary valve in a rotary gas separation device.