Dual propeller surface drive propulsion system for boats

Details Dual propeller surface drive propulsion system for boats Dual propeller surface drive propulsion system for boats

2006-07-04

2006-07-04

Swinehart, Ed (Department: 3617)

Marine propulsion

Screw propeller

Propeller arrangement

C440S057000

Reexamination Certificate

active

07070469

ABSTRACT:
The dual propeller surface drive propulsion system for boats is a combined propulsion and steering system for vessels with inboard engines comprising an enclosed thrust bearing assembly mounted to the transom of the vessel, a transom box mounted to the transom of the vessel that encompasses the thrust bearing assembly, an articulated outdrive pivotally connected to the transom box, a gearbox contained within the articulated outdrive, two counter rotating propeller shafts equipped with surface-piercing propellers and a steerable rudder system. Counter-rotating propellers reduce propeller-induced torque. By combining an articulated outdrive with a steerable rudder greater maneuverability of the vessel is achieved.

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