Water jet propulsion apparatus

Details Water jet propulsion apparatus Water jet propulsion apparatus

2005-01-11

2005-01-11

Wright, Andrew (Department: 3617)

Marine propulsion

Jet drive

Having means to increase fluid drive means efficiency

C416S24500R

Reexamination Certificate

active

06840826

ABSTRACT:
A water jet propulsion apparatus having a duct forming a channel, an impeller disposed in the duct, a bearing of the impeller provided in the duct, and a cap closing the rear end of the bearing. In addition, at least one stream-straightening groove is formed in an external face of the cap. In the internal face of the duct, a stationary vane is formed in a portion facing toward the cap. Accordingly, a rotational component of a water stream close to the external face of a cap the bearing is substantially reduced, the size of the cap may be reduced, and cap position is not controlled by the position of the stationary vane.

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patent: 5-105189 (1993-04-01), None

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