Water jet propulsion watercraft

Details Water jet propulsion watercraft Water jet propulsion watercraft

2006-10-17

2006-10-17

Olson, Lars A. (Department: 3617)

Marine propulsion

With indicator

C440S038000, C073S187000

Reexamination Certificate

active

07121904

ABSTRACT:
A water jet propulsion watercraft that allows accurate speed detection of a speed detection unit to be achieved. A water jet propulsion watercraft includes a hull bottom plate with left and right guide grooves for guiding water rearwardly of the hull. The left and right guide grooves are disposed in a fore-and-aft direction at an area excluding at least a front portion of the hull bottom plate. Further, the hull bottom plate includes a flat surface formed at the front portion of the left and right guide grooves and on a surface facing the water. The flat surface is provided with an opening for guiding water to a speed detection unit.

REFERENCES:
patent: 5369360 (1994-11-01), Amyot
patent: 5606253 (1997-02-01), Boucher et al.
patent: 5699749 (1997-12-01), Yamada et al.
patent: 5894087 (1999-04-01), Ohtuka et al.
patent: 6101965 (2000-08-01), Koyanagi
patent: 6213041 (2001-04-01), Kojima et al.
patent: 6676461 (2004-01-01), Hasegawa et al.
patent: 10-129583 (1998-05-01), None

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