Water jet pump

Details Water jet pump Water jet pump

2006-02-21

2006-02-21

Olson, Lars A. (Department: 3617)

Marine propulsion

Jet drive

Reexamination Certificate

active

07001228

ABSTRACT:
A water jet pump is provided which reduces cavitation and thereby allows an improvement in pump efficiency. In a water jet pump in which an impeller driven for rotation and is provided in a cylindrical housing, an edge portion of the outer circumferential surface of the impeller that opposes the inner surface of the housing is formed with a radius of curvature. This structure reduces a variation in the pressure of a water stream passing between the outer circumferential surface of the impeller and the inner surface of the housing toward the impeller front surface side, thereby reducing the occurrence of cavitation and improving the pump efficiency.

REFERENCES:
patent: 3137265 (1964-06-01), Meyerhoff
patent: 3598080 (1971-08-01), Shields
patent: 4739754 (1988-04-01), Shaner
patent: 4917637 (1990-04-01), Soga et al.
patent: 6059618 (2000-05-01), Purnell et al.
patent: 200287385 (2002-03-01), None
patent: 2003089394 (2003-03-01), None

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