Marine propulsion – Jet drive – Having means to increase fluid drive means efficiency
Reexamination Certificate
2005-02-15
2005-02-15
Wright, Andrew D. (Department: 3617)
Marine propulsion
Jet drive
Having means to increase fluid drive means efficiency
C114S055510
Reexamination Certificate
active
06855019
ABSTRACT:
To provide a jet propulsion watercraft that allows a step, a vent hole, and the like to be easily provided on a bottom surface thereof. A ride plate of a jet propulsion watercraft is a member, which is formed into a substantially rectangular shape in compliance to an opening in a bottom surface of a hull bottom. The ride plate is provided with a lock tab at a front edge thereof, and bolt holes are made in a right and left end portion thereof. The ride plate is further provided with a step portion that forms part of a general bottom surface, since it is flush with the general bottom surface, a higher level surface that forms a flat surface higher than the step portion by a predetermined distance, and a pair of vent holes that pass vertically through the higher level surface at a position therein closer to the step portion.
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Fuse Tomohiro
Kochi Takao
Yoshida Jo
Birch & Stewart Kolasch & Birch, LLP
Wright Andrew D.
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