Marine propulsion – Jet drive – Direction control for fluid jet
Patent
1992-10-26
1994-02-01
Huppert, Michael S.
Marine propulsion
Jet drive
Direction control for fluid jet
114 61, 114114B, 114151, B63H 11113
Patent
active
052827631
ABSTRACT:
A steerable bow thruster (12) system is located substantially within the pontoons (20) of a semisubmerged vessel (10) exclusive of a rotating nozzle (42) which is located on the upper side of the pontoons. The rotating nozzle can turn in any direction and allows the steerable bow thruster system to thrust forward, aft and side to side and in any direction in between to allow the semisubmerged vessel to maneuver freely and without the assistance of the main engines. To minimize draft and to prevent ecological harm, the nozzles are installed on top of the pontoons allowing the pontoons to act as a barrier to keep thrust wash from disturbing shallow ocean bottoms and reefs over which the vessel may be operating. The propelling means may be shrouded to prevent harm or injury to swimmers who may be in the water. A rudder (44) may also be coupled to the thruster nozzle to provide directional control for the semisubmerged vessel when it is underway at higher speeds. The nozzle of the propelling means may be located forward of the center of lateral resistance of the semisubmerged vessel.
REFERENCES:
patent: 3868920 (1975-03-01), Schirtzinger
patent: 4345533 (1982-08-01), Kunitake
patent: 5176094 (1993-01-01), Gongwer
Brahan Thomas J.
Huppert Michael S.
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