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:
Apr. 25, 2023
Filed:
Sep. 09, 2020
Applicant:
Sifly Aviation, Inc., Carmel Valley, CA (US);
Inventors:
Brian L. Hinman, Los Gatos, CA (US);
Jeffrey G. Bernstein, Middleton, MA (US);
Assignee:
SiFly Aviation, Inc., Carmel Valley, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B64D 31/06 (2006.01); B64D 27/24 (2006.01); B60L 7/18 (2006.01); G05D 1/10 (2006.01); B60L 50/60 (2019.01); B64C 27/00 (2006.01); B64C 27/57 (2006.01);
U.S. Cl.
CPC ...
B64D 31/06 (2013.01); B60L 7/18 (2013.01); B60L 50/60 (2019.02); B64C 27/006 (2013.01); B64C 27/57 (2013.01); B64D 27/24 (2013.01); G05D 1/101 (2013.01); B60L 2200/10 (2013.01);
Abstract
A method of operating an electrically powered rotorcraft of the type having a fuselage and a set of N rotors driven by a set of electric motors and coupled to the fuselage, N≥4, under a failure condition preventing ordinary operation of the rotorcraft. The method includes entering a failsafe mode of operation wherein autorotation of at least four of the rotors is enabled. The method also includes using electrical braking associated with a selected group of the rotors to control yaw of the rotorcraft.