Impeller drive for a water jet propulsion unit

Details Impeller drive for a water jet propulsion unit Impeller drive for a water jet propulsion unit

2008-10-01

2010-11-02

Olson, Lars A (Department: 3617)

Marine propulsion

Jet drive

C440S079000

Reexamination Certificate

active

07824237

ABSTRACT:
A water propulsion unit having an intake housing, a pump housing and an outlet with two spaced apart counter rotating impellers being located in the pump housing. The impeller blades on one impeller have an opposite pitch to the blades of the second impeller. The impellers are configured so that one of the impellers will impart less energy to the water as it passes the blades of the impeller than the second impeller.

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