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. 04, 2011
Filed:
Jan. 30, 2008
Reiko Takashima, Nagasaki, JP;
Makoto Nishigaki, Nagasaki, JP;
Toshinobu Sakamoto, Nagasaki, JP;
Naoki Ueda, Tokyo, JP;
Kenichi Yamamoto, Tokyo, JP;
Reiko Takashima, Nagasaki, JP;
Makoto Nishigaki, Nagasaki, JP;
Toshinobu Sakamoto, Nagasaki, JP;
Naoki Ueda, Tokyo, JP;
Kenichi Yamamoto, Tokyo, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A stern shape of a displacement-type marine vessel enables reduction of the hull resistance and prevents propeller cavitation. The displacement-type marine vessel which travels in a velocity range in which the Froude number is smaller than the last hump and the stern includes knuckle lines connecting knuckle points provided on the surface of the hull, from a starting point in front of a propeller to an end point behind the propeller. A portion of the stern located inside the knuckle line in the direction of the width of the hull has a dome shape with upward curvature, and the length of the portion which has the dome shape is set to 10% or more of the entire hull length or at least the diameter of the propeller.