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:
Aug. 31, 2004
Filed:
Sep. 04, 2002
Takeaki Nozaki, Osaka, JP;
Yanmar Diesel Engine Co., Ltd., Osaka, JP;
Abstract
A hydrofoil ( ) comprises a bottom ( ) formed with two front and rear steps ( and ), and a strut ( ) supporting a submerged hydrofoil ( ) arranged between the two steps ( and ). The strut ( ) can be switched between a storage state and a navigation state by its forward-and-backward rotation. A threshold value of dynamic lift (F) obtained by the hydrofoil ( ) can be established arbitrarily, and the dynamic lift can be held to the set value by keeping the strut ( ) in the navigation state correspondingly to the established threshold value of hydrofoil-dynamic-lift, thereby enabling the dynamic lift to be held at the established value during navigation. Moreover, based on draft (WL) or trim angle (TR) during the boat-berthing, a set value of hydrofoil-dynamic-lift and a set value of tilt angle of a propulsor ( ) or a flap ( ) attached to the rear of hull can be accommodated.