Marine propulsion – Jet drive
Reexamination Certificate
2004-07-13
2008-11-11
Olson, Lars A (Department: 3617)
Marine propulsion
Jet drive
C440S079000
Reexamination Certificate
active
07448926
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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Davies Barry John
Paterson Paul Mark
McCormick Paulding & Huber LLP
Olson Lars A
Propeller Jet Limited
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