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:
Jul. 01, 2025
Filed:
May. 05, 2023
Pratt & Whitney Canada Corp., Longueuil, CA;
Michel Desjardins, St-Hubert, CA;
Herve Turcotte, Ste-Julie, CA;
Pratt & Whitney Canada Corp., Longueuil, CA;
Abstract
A reduction gearbox is provided that includes a planetary gear arrangement disposed in a casing and a lubrication handling system. The planetary gear arrangement includes a sun gear, planet gear assemblies, and independent fore and aft ring gears. Each planet gear assembly has fore and aft lateral gears respectively disposed on opposite sides of a main gear and rotating therewith. The main gear has a main gear pitch diameter and the fore and aft lateral gears having a lateral gear pitch diameter. The fore ring gear is meshed with the fore lateral gears. The aft ring gear is meshed with the aft lateral gears. The planet gear assemblies are in communication with an output. The lubrication handling system includes a fore ring gear baffle and an aft ring gear baffle.