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. 13, 2024
Filed:
Mar. 16, 2023
General Electric Company, Schenectady, NY (US);
James H. Grooms, Hamilton, OH (US);
Keith A. Miedema, Fairfield, OH (US);
Randy M. Vondrell, Newport, KY (US);
General Electric Company, Cincinnati, OH (US);
Abstract
An example turbo engine includes a rotary hub and a propeller including a blade coupled to the rotary hub. The blade is rotatable about a radial axis to change a pitch of the blade. The turbo engine also includes a blade pitch actuation system including an actuator coupled to the blade. The actuator is moveable in a first direction to rotate the blade to a feather position and in a second direction to rotate the blade away from the feather position. The blade pitch actuation system also includes a hydraulic system to provide hydraulic fluid to one or more hydraulic chambers to move the actuator and a pressurized pneumatic chamber formed by a portion of the actuator. The pressurized pneumatic chamber biases the actuator in the first direction to move the blade to the feather position in an event of failure of the hydraulic system.