Boat propulsion unit

Details Boat propulsion unit Boat propulsion unit

2009-03-30

2011-12-13

Venne, Daniel (Department: 3617)

Marine propulsion

Means to control the supply of energy responsive to a sensed...

Reexamination Certificate

active

08075353

ABSTRACT:
A boat propulsion unit includes a power source, a propeller, a shift position changing mechanism, a control device, and a speed reducing switch. The shift position changing mechanism has an input shaft, an output shaft, and first and second clutches. The first and second clutches change the connection state between the input shaft and the output shaft. In the shift position changing mechanism, the first and second clutches are engaged or disengaged, thereby changing the shift position among forward, neutral, and reverse. The control device controls connecting forces of the first and second clutches so that the propeller generates propulsive forces in the direction opposite to the present propulsive direction of a hull when the speed reducing switch is turned on by the operator of the boat. The boat propulsion unit easily retains the propulsive speed of a hull substantially at zero.

REFERENCES:
patent: 4843368 (1989-06-01), Poulos
patent: 4898563 (1990-02-01), Torigai et al.
patent: 4976636 (1990-12-01), Torigai et al.
patent: 3499204 (2004-02-01), None

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