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. 06, 2026
Filed:
Nov. 26, 2024
Pratt & Whitney Canada Corp., Longueuil, CA;
Tyler Richardson, Toronto, CA;
Nathan Tomes, Hamilton, CA;
Pratt & Whitney Canada Corp., Longueuil, CA;
Abstract
A rotating structure for an aircraft powerplant includes a shaft, a retainer, a balancing device and a bladed rotor. The shaft includes a bore and a shoulder axially along the bore. The retainer is disposed in the bore and mounted to the shaft. The balancing device is configured to rotationally balance the rotating structure about the axis. The balancing device is disposed in the bore and axially retained between the shoulder and the retainer. The balancing device includes a balancing mass with a plurality of mass teeth arranged circumferentially about the axis. During a first condition, the balancing mass is rotationally repositionable about the axis relative to the shaft while the balancing device remains in the bore and axially retained between the shoulder and the retainer. During a second condition, the mass teeth are meshed with a plurality of shaft teeth to rotationally fixed the balancing mass to the shaft.