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. 08, 2020
Filed:
Dec. 10, 2014
Applicant:
Pratt & Whitney Canada Corp., Longueuil, CA;
Inventor:
Xiaoliu Liu, Mississauga, CA;
Assignee:
PRATT & WHITNEY CANADA CORP., Longueuil, QC, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F02C 7/00 (2006.01); F02C 7/18 (2006.01); F01D 5/08 (2006.01); F02C 7/143 (2006.01); F02C 9/18 (2006.01); F04D 29/52 (2006.01); F04D 29/58 (2006.01);
U.S. Cl.
CPC ...
F02C 7/185 (2013.01); F01D 5/082 (2013.01); F02C 7/143 (2013.01); F02C 9/18 (2013.01); F04D 29/522 (2013.01); F04D 29/584 (2013.01); F05D 2260/213 (2013.01);
Abstract
A method and apparatus using a cooler to selectively cool P3 air directed into an impeller rear cavity of a gas turbine engine during engine high power levels, may include connection of the cooler to a low pressure compressor bleed-off valve apparatus that is modulated to be closed during engine high power levels to create a pressure differential over the bleed-off valve apparatus, to drive a stream of low pressure compressor air as a cooling work fluid under such pressure differential to selectively flow through the cooler.