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:
Jan. 04, 2022
Filed:
Feb. 07, 2018
Applicant:
Japan Aerospace Exploration Agency, Tokyo, JP;
Inventors:
Masahiko Sugiura, Tokyo, JP;
Yasutada Tanabe, Tokyo, JP;
Noboru Kobiki, Tokyo, JP;
Takashi Aoyama, Tokyo, JP;
Assignee:
JAPAN AEROSPACE EXPLORATION AGENCY, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B64C 27/46 (2006.01); B64C 27/04 (2006.01); B64C 27/467 (2006.01); B64C 27/473 (2006.01); F01D 5/14 (2006.01); F01D 5/30 (2006.01);
U.S. Cl.
CPC ...
B64C 27/463 (2013.01); B64C 27/04 (2013.01); B64C 27/467 (2013.01); B64C 27/473 (2013.01); F01D 5/14 (2013.01); F01D 5/30 (2013.01); F05D 2220/90 (2013.01); F05D 2240/307 (2013.01);
Abstract
A main rotor blade, which is the main rotor bladefor a high-velocity helicopter, includes: a blade root parthaving a length of 30% or more of a rotor radius R; and a blade main bodycontinuous with the blade root part. Preferably, a cross-sectional shape of the blade root partsatisfies (x/a)+(y/b)=1 and a>b, where m: arbitrary number, x: chord length direction, and y: blade thickness direction.