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:
Sep. 17, 2019
Filed:
Dec. 06, 2016
Applicant:
Airbus Helicopters, Marignane, FR;
Inventors:
Debbie Leusink, Aix en Provence, FR;
David Alfano, Aix en Provence, FR;
Vincent Gareton, Ensues la Redonne, FR;
Assignee:
AIRBUS HELICOPTERS, Marignane, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B64C 27/04 (2006.01); B64C 27/46 (2006.01); B64C 27/467 (2006.01); B64C 27/473 (2006.01);
U.S. Cl.
CPC ...
B64C 27/473 (2013.01); B64C 27/04 (2013.01); B64C 27/463 (2013.01); B64C 27/467 (2013.01);
Abstract
A blade of a rotor for a rotary wing aircraft. The blade presents relationships for variation in the sweep and in the chord of the profiles of sections of the blade, in particular in order to improve the twisting stiffness and the bending stiffness of the blade. The blade is then double-tapered and it presents three sweeps, making it possible firstly to improve the aerodynamic performance of the blade in forward flight, and secondly to reduce the noise given off by the blade, in particular during an approach flight.