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:
Jul. 20, 2010
Filed:
Feb. 28, 2006
Applicants:
Yasutada Tanabe, Tokyo, JP;
Takeshi Akasaka, Tokyo, JP;
Shigeru Saito, Tokyo, JP;
Noboru Kobiki, Tokyo, JP;
Inventors:
Yasutada Tanabe, Tokyo, JP;
Takeshi Akasaka, Tokyo, JP;
Shigeru Saito, Tokyo, JP;
Noboru Kobiki, Tokyo, JP;
Assignees:
Kawada Industries, Inc., Tokyo, JP;
Japan Aerospace Exploration Agency, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B64C 3/50 (2006.01); B64C 3/54 (2006.01); B64C 23/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
In a blade vortex interaction (BVI) noise reduction system for a helicopter a rotor blade, a tab is movable via an actuator from a first position, wherein the tab is within the blade, to a second position, wherein the tab extends outwardly from a trailing edge of the rotor blade. The actuator is operated so that the tab advances and retreats in response to rotating timing of the rotor blade, to reduce the BVI noise of the rotor blade.