Marine propulsion – Screw propeller – With means effecting or facilitating movement of propulsion...
Patent
1981-02-18
1986-01-21
Basinger, Sherman D.
Marine propulsion
Screw propeller
With means effecting or facilitating movement of propulsion...
440 61, 440 75, B63H 2302
Patent
active
045655324
ABSTRACT:
A drive mechanism for a boat having the motor located inboard. The mechanism disclosed includes a gearbox located outboard of the transom with an input shaft extending toward the inboard motor and an output shaft extending aft toward a propeller shaft. A universal joint coupling is provided to drive the propeller shaft while a gimbal ring is employed to universally mount a propeller shaft housing such that the propeller may be used for steerage as well as forward thrust. The gearbox is disclosed as including a first gear pair capable of being changed to provide different output ratios. A second drive link in the gearbox gives a selection of directions of rotation of the propeller shaft. In a first instance, a gear pair is employed. In a second instance, a chain drive is employed. Access is provided into the gearbox by a plate located between the gearbox and the transom. This plate provides a mounting for the drive links within the gearbox. Another gearbox having a single gear pair is also disclosed for lowering the level of the propeller shaft relative to the boat hull.
REFERENCES:
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patent: 3628492 (1971-12-01), Baldwin et al.
patent: 3933116 (1976-01-01), Adams et al.
patent: 3951096 (1976-04-01), Dunlap
Basinger Sherman D.
Kaama Marine Engineering, Inc.
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