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:
Dec. 23, 2014
Filed:
Dec. 09, 2005
Zaffir Chaudhry, South Glastonbury, CT (US);
Brian E. Wake, South Glastonbury, CT (US);
Fanping Sun, Glastonbury, CT (US);
Richard Jeremy Bedwell, Bristol, GB;
Jimmy Lin-min Yeh, West Hartford, CT (US);
Lee A. Hoffman, Vernon, CT (US);
Zaffir Chaudhry, South Glastonbury, CT (US);
Brian E. Wake, South Glastonbury, CT (US);
Fanping Sun, Glastonbury, CT (US);
Richard Jeremy Bedwell, Bristol, GB;
Jimmy Lin-Min Yeh, West Hartford, CT (US);
Lee A. Hoffman, Vernon, CT (US);
Sikorsky Aircraft Corporation, Stratford, CT (US);
Abstract
A device for controlling the pitch of a helicopter's rotor blade, the device having a BLDC motor based actuator; and at least one control surface operatively connected to the BLDC motor based actuator. The actuator and the control surface are preferably fully integrated into the interior profile of the rotor blade and are capable of controlling the PFC of the helicopter and improving HHC during operation by reducing noise and vibration. The motor is preferably a high power density motor incorporating rare earth permanent magnets connected to a roller/ball screw or planetary gear set to provide the right combination of force/torque, stroke and frequency.