Marine propulsion – Screw propeller – Having transmission
Patent
1990-08-17
1991-07-09
Basinger, Sherman
Marine propulsion
Screw propeller
Having transmission
440 81, 416129, B63H 2300
Patent
active
050301497
ABSTRACT:
An arrangement for transferring power of an engine to front and rear propellers of a ship comprises an inner propeller shaft directly coupled to the engine, an outer propeller shaft coupled to the engine via the planetary gear set in a manner such that the front propeller rotates in a direction opposite to the direction the rear propeller rotates. The planetary gear set includes first planetary gears coupled to the inner propeller shaft and secondary planetary gears coupled to the outer propeller shaaft and one clutch is provided between each pair of first and second planetary gears. Since there are provided a plurality of clutches, the torque imposed on each clutch is relatively small. Also, the torque on the clutch is reduced by the planetary gear set. Therefore, a clutch of small capacity can be employed. This makes the arrangement compact and the maintenance of the clutch easy.
REFERENCES:
patent: 3688732 (1972-09-01), Singelmann et al.
patent: 4642059 (1987-02-01), Nohara
patent: 4963108 (1990-10-01), Koda et al.
Avila Stephen P.
Basinger Sherman
Gossett Dykema
Ishikawajima-Harima Heavy Industries Co. Ltd.
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