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:
Nov. 28, 2023
Filed:
Dec. 17, 2019
Hamilton Sundstrand Corporation, Charlotte, NC (US);
Timothy Maver, Glastonbury, CT (US);
Julien Lassalle, Saint Jean Lagineste, FR;
Thibaut Marger, Béduer, FR;
Gregory Giddings, Windsor, CT (US);
Charles L. DeGeorge, Suffield, CT (US);
Stephen J. Bukowinski, Windsor Locks, CT (US);
Romain Bouloc, Saint Félix, FR;
HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US);
Abstract
A system for controlling a propeller having a plurality of blades having a primary control system and a backup control system. The primary control system including a sensor responsive to a propeller state, and a controller connected to the sensor and to an electrohydraulic control actuator. The electrohydraulic control actuator is connected via a bypass valve to a hydraulic actuator that controls at least a blade angle of a blade of the propeller. The controller generating commands to the electrohydraulic control actuator based on at least the propeller state. The backup control system including a second controller, an electrohydraulic solenoid operably connected to the bypass valve. The backup control system is operable to hydraulically disable the primary control system via the bypass valve upon the occurrence of a selected condition, the second controller modulates the operation of the electrohydraulic solenoid to control the bypass actuator based on the propeller state.