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:
Oct. 22, 2013
Filed:
Feb. 18, 2009
Shinichi Takano, Nagasaki, JP;
Chiharu Kawakita, Nagasaki, JP;
Seijiro Higasa, Nagasaki, JP;
Shuji Mizokami, Tokyo, JP;
Shoichi Kameyama, Nagasaki, JP;
Takashi Mine, Nagasaki, JP;
Shinichi Takano, Nagasaki, JP;
Chiharu Kawakita, Nagasaki, JP;
Seijiro Higasa, Nagasaki, JP;
Shuji Mizokami, Tokyo, JP;
Shoichi Kameyama, Nagasaki, JP;
Takashi Mine, Nagasaki, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
In a friction reducing device for a ship body by forming an air bubble curtain on a ship's bottom by generating air bubbles from air ejection holes formed on the bottom, the air ejection holes are arranged in a ship width direction to constitute a plurality of air-ejection hole groups. The air-ejection hole groups include at least a center air-ejection hole group formed at the center of the ship width direction at a bow side and a pair of side air-ejection hole groups formed at a stern side from the center air-ejection hole group at both sides of the center air-ejection hole group in the ship width direction. A length of the center air-ejection hole group in the ship width direction is formed to be longer than a length of each of the side air-ejection hole groups in the ship width direction.