Waterjet propelling device of boat

Marine propulsion – Jet drive

Reexamination Certificate

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C416S22300B

Reexamination Certificate

active

06923694

ABSTRACT:
Rotary vanes having inducer-joined axial-flow vane portions, mixed-flow vane portions collisionlessly connected to the axial-flow vane portions, and centrifugal vane portions collisionlessly connected to the mixed-flow vane portions are wound around an outer peripheral surface of a hub that is continuously curved. The hub is configured with a moderate slope region and a steep slope region. The axial-flow vane portions and the mixed-flow vane portions are wound around the moderate slope region, and the centrifugal vane portions being wound around the steep slope region.

REFERENCES:
patent: 3082732 (1963-03-01), Stallman
patent: 5108257 (1992-04-01), Fukazawa et al.
patent: 5876257 (1999-03-01), Lin
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patent: 6645018 (2003-11-01), Ishigaki et al.
patent: 6752671 (2004-06-01), Ishigaki et al.
patent: 2003/0056704 (2003-03-01), Ishigaki et al.
patent: 2003/0104733 (2003-06-01), Ishigaki et al.
patent: 2004/0067133 (2004-04-01), Ishigaki et al.
patent: 1-104898 (1989-07-01), None
patent: 3-67097 (1991-03-01), None
patent: 8-253196 (1996-10-01), None
patent: 10-59287 (1998-03-01), None
patent: 11-70894 (1999-03-01), None
patent: 2000-118494 (2000-04-01), None
English Language Abstract of JP 3-67097.
English Language Abstract of JP 10-59287.
English Language Abstract of JP 11-70894.
English Language Abstract of JP 2000-118494.
English Language Abstract of JP 8253196.

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