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:
Jan. 14, 2025
Filed:
Dec. 21, 2023
Pratt & Whitney Canada Corp., Longueuil, CA;
Patrice Remy, St-Hubert, CA;
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Abstract
An aircraft engine comprises a rotating component and a reduction gearbox connected thereto. A rotating shaft extending along an axis is coupled to the gearbox. A thrust bearing disposed in a bearing housing extends around the shaft and supports the shaft. The bearing housing defines a piston chamber. A piston therein axially secured to the shaft and in sealing engagement with the bearing housing divides the chamber into two cavities. The piston has opposite first and second axial faces exposed to respective cavities. The first face faces axially away from the thrust bearing. A compressed air source is in fluid communication with the first cavity with air at a first pressure exerting a first force against the first axial face. The second cavity is at a second pressure exerting a second force against the second axial face. The first force is greater than the second.