Water-jet pump, impeller for the same, and boat including...

Details Water-jet pump, impeller for the same, and boat including... Water-jet pump, impeller for the same, and boat including...

2008-09-12

2010-11-23

Avila, Stephen (Department: 3617)

Marine propulsion

Jet drive

C416S22300B, C417S151000

Reexamination Certificate

active

07837523

ABSTRACT:
A water-jet pump includes a cylindrical housing and an impeller. The impeller is disposed in the cylindrical housing and is configured to be rotated in a rotating direction. The impeller includes a shaft body and plural blades. The plural blades are provided on an outer circumference of the shaft body. A front portion of one of the plural blades overlaps a rear portion of another of the plural blades adjacent to one of the plural blades when viewed in an axial direction of the shaft body. When viewed in the axial direction, at least a part of a rear edge of the rear portion is formed obliquely with respect to a radial direction of the impeller towards the rotating direction. A cutaway portion is formed in each of the plural blades between at least a part of the rear edge and the outer circumference.

REFERENCES:
patent: 6699016 (2004-03-01), Dean
patent: 9-99895 (1997-04-01), None

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