Water jet propulsion unit with counter-rotating impellers

Details Water jet propulsion unit with counter-rotating impellers Water jet propulsion unit with counter-rotating impellers

B - Operations, Transporting

63

H

B63H 11/02 (2006.01) B63H 11/08 (2006.01) B63H 11/103 (2006.01)

Patent

CA 2342650

A water jet apparatus with counter-rotating impellers for propelling a boat. The impellers are coupled by an assembly comprising an impeller shaft secured to a first impeller and a gear train coupling the impeller shaft to a second impeller for counter-rotation. Preferably the gear train comprises one beveled gear secured to the impeller shaft, another beveled gear secured to the second impeller, and a beveled pinion meshed with the first and second beveled gears. The counter-rotating impellers can be driven by a drive shaft coupled to the first impeller for boats having an inboard motor or by a drive shaft coupled to the pinion for boats having an outboard motor.

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