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. 22, 2019
Filed:
Sep. 08, 2017
Applicant:
Pratt & Whitney Canada Corp., Longueuil, CA;
Inventors:
Assignee:
Pratt & Whitney Canada Corp., Longueuil, Quebec, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F01D 17/16 (2006.01); F01D 9/04 (2006.01); F04D 29/56 (2006.01);
U.S. Cl.
CPC ...
F01D 17/162 (2013.01); F01D 9/041 (2013.01); F04D 29/563 (2013.01); F05D 2240/12 (2013.01); F05D 2260/38 (2013.01); F05D 2260/53 (2013.01);
Abstract
A variable stator guide vane system for a gas turbine engine comprises a set of vanes circumferentially distributed around a central axis and rotatably mounted for rotation about respective spanwise axes. A ring gear is rotatably mounted about the central axis. Pinion gears are operatively coupled to respective ones of the vanes and in driving engagement with the ring gear. Biasing members individually bias the pinion gears in meshing engagement with the ring gear.