WATER JET PROPULSION DEVICE FOR MARINE VESSEL

Title:

WATER JET PROPULSION DEVICE FOR MARINE VESSEL

Document Type and Number:

WIPO Patent Application WO/1998/025815

Kind Code:

A1

Abstract:

A pump frame (7) is fixed to a ship bottom (1b) such that an inflow port (19) in a lower portion thereof is open in the water near a stern (1a). A mixed flow pump (8) is fixed to a pedestal (12) provided on the ship bottom (1b). A suction port (26) of the mixed flow pump (8) is connected to a connection port (17) at an upper portion of the pump frame (7), and a discharge pipe (13) is connected to a discharge port (27) of the mixed flow pump (8). Provided in a pump casing (9) of the mixed flow pump (8) is an impeller shaft (33) to extend horizontally, on which is provided an impeller (11) for sucking water below the ship bottom (1b) through the inflow port (19) to pressurize the same. The water pressurized by the impeller (11) is jetted rearwardly of the stern through a discharge pipe (13) whereby a marine vessel (1) is propelled. Such water jet propulsion device (5) provides a suction performance free of cavitation and a high propelling performance.

Inventors:

ISHIGAKI EIICHI (JP)

Application Number:

PCT/JP1997/004482

Publication Date:

June 18, 1998

Filing Date:

December 08, 1997

Export Citation:

Click for automatic bibliography generation Help

Assignee:

ISHIGAKI MECH IND (JP)
ISHIGAKI EIICHI (JP)

International Classes:

B63H11/08; (IPC1-7): B63H11/08

Foreign References:

JPH08127392A	1996-05-21
JPH06286692A	1994-10-11
JPH05105189A	1993-04-27
JPH01122797A	1989-05-16
JPS626892A	1987-01-13
JPH04342691A	1992-11-30
JPH0610100U	1994-02-08
JPS5048692A	1975-04-30
JPH01262291A	1989-10-19
JPH07117076A	1995-05-09
JPH05270486A	1993-10-19

Other References: