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. 27, 2004
Filed:
Sep. 25, 2002
Yoshimoto Matsuda, Kobe, JP;
Takeru Oshima, Kobe, JP;
Kawasaki Jukogyo Kabushiki Kaisha, Kobe, JP;
Abstract
Disclosed is a pump structure of a jet-propulsion watercraft capable of preventing an increase in frictional resistance between a sleeve and an impeller. There is provided a pump structure of a jet-propulsion watercraft adapted to eject water pressurized and accelerated by a water jet pump driven by the engine from an outlet port so as to be propelled as the resulting reaction, the water jet pump comprising a cylindrical pump casing, an impeller supported coaxially in the pump casing and rotatably driven by the engine, and a cylindrical sleeve made of a metal different from a metal of the pump casing, wherein an annular layer made of a material that decreases electrolytic corrosion or oxidation of the pump casing or the sleeve is formed between the pump casing and the sleeve.