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:
Sep. 05, 2017
Filed:
Mar. 31, 2015
Applicant:
Pratt & Whitney Canada Corp., Longueuil, CA;
Inventors:
Tibor Urac, Mississauga, CA;
Bernard Chow, Mississauga, CA;
Assignee:
PRATT & WHITNEY CANADA CORP., Longueuil, Quebec, unknown;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16J 15/56 (2006.01); F16J 9/12 (2006.01); F16J 15/32 (2016.01); F16J 9/06 (2006.01); F16J 15/3208 (2016.01);
U.S. Cl.
CPC ...
F16J 9/06 (2013.01); F16J 15/56 (2013.01); F16J 9/12 (2013.01); F16J 15/3208 (2013.01);
Abstract
A cylindrical seal apparatus according to one embodiment includes a split spring ring and a split seal ring supported in a groove for example defined in a piston. The split spring ring in a tensioning condition presses against a tapered annular inner surface of the split seal ring to create a radial pre-load and an axial pre-load to the slit seal ring to establish a primary sealing contact between the seal ring and a cylinder, and a second sealing condition between the seal ring and a lower-pressure side of the groove, before the working fluid pressure is built up.