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. 04, 1998
Filed:
Sep. 04, 1996
Takeru Oshima, Akashi, JP;
Kawasaki Jukogyo Kabushiki Kaisha, Kyogo, JP;
Abstract
A discharge port 4 for discharging air into water is provided on the bottom of a craft behind the rear end of a strip 3 which is installed on the bottom of a small planing watercraft to protrude therefrom and extend in the longitudinal direction of the craft body. A pressure drop in a space behind the rear end of the strip 3 is used to suck in air outside of the craft and guide it through a discharge duct 5 to the discharge port 4, thereby decreasing the pressure resistance and friction resistance generated at the back of the strip 3 rear end. Ram pressure during running of the craft may also be used to take in air from the outside of the craft and guide it through the discharge duct 5 to the discharge port 4, thereby to discharge air from the discharge port 4 into water. The maximum craft speed and the craft acceleration performance is improved by sufficiently decreasing friction resistance at the back of strip rear end.