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:
Aug. 04, 2026
Filed:
Apr. 04, 2025
Pratt & Whitney Canada Corp., Longueuil, CA;
Thibaut Edmond J. Duchene, Longueuil, CA;
Mateusz Kesek, Dȩbica, PL;
Michel Abdelnour, Longueuil, CA;
Roberto Brito, Boucherville, CA;
Sebastien Bergeron, Chambly, CA;
Marcin Rejman, Rzeszow, PL;
Munir Nathoo, Montreal, CA;
PRATT & WHITNEY CANADA CORP., Longueuil, CA;
Abstract
An aircraft engine has: a low-pressure assembly having first components having first inlets and first scavenge outlets; a high-pressure spool having second components having second inlets and second scavenge outlets; a lubricant system having: a lubricant tank; a main pump and a scavenge pump operable to drive a flow of the lubricant; a secondary pump; and valves; the lubricant system having: a standard configuration in which the valves define a standard flow path extending from the lubricant tank to the first inlets and the second inlets via the main pump; and a windmilling configuration in which the valves define a windmilling flow path extending from the lubricant source to the first inlets via the secondary pump while bypassing the main pump, and from the first scavenge outlets to the lubricant source while bypassing the scavenge pump.