Patent ID: 7174842
Filing Date: 2007-02-13
Classification: B63H

Abstract:
1. A boat propulsion system mounted on a boat and being replaceable to a rudder, comprising: a plurality of positive displacement pumps having a high discharge head and mounted on a bottom of the boat and driven by a motive power, each pump comprising a housing having a driving chamber, an inlet and an outlet, wherein a first gear rotor and a second gear rotor which are assembled in the driving chamber and being engaged with each other, each outlet of the pumps disposed on different positions according to moving directions of the boat; and a controlling panel set on the boat having circuits for switching on or off each pump, further comprises a transmission apparatus driven by the motive power and pivotally connected to each of the pumps for transmitting a supplied power at a steady speed or a discrepant speed in order to drive each of the pumps.