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. 10, 2019
Filed:
Mar. 01, 2017
Applicant:
Pratt & Whitney Canada Corp., Longueuil, CA;
Inventors:
Adam Logan, Toronto, CA;
Ritchie Domingo, Markham, CA;
Assignee:
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02C 7/28 (2006.01); F02C 7/06 (2006.01); F02C 7/32 (2006.01); F16C 33/74 (2006.01); F01D 25/16 (2006.01); F01D 25/18 (2006.01); F16C 33/66 (2006.01); F16C 33/78 (2006.01);
U.S. Cl.
CPC ...
F02C 7/28 (2013.01); F01D 25/16 (2013.01); F01D 25/183 (2013.01); F02C 7/06 (2013.01); F02C 7/32 (2013.01); F16C 33/748 (2013.01); F05D 2220/32 (2013.01); F05D 2260/605 (2013.01); F05D 2270/3015 (2013.01); F16C 33/6685 (2013.01); F16C 33/7816 (2013.01); F16C 2360/23 (2013.01);
Abstract
Apparatus and methods for controlling a pressure differential across one or more seals of a bearing chamber in a gas turbine engine are disclosed. In some embodiments, the apparatus comprises a scavenge pump in fluid communication with an interior of the bearing chamber for driving oil from the bearing chamber; and a venting valve. The venting valve is configured to cause venting of the interior of the bearing chamber in parallel to the scavenge pump based on the pressure differential across the one or more seals.