Marine propulsion – Jet drive – Direction control for fluid jet
Patent
1990-05-10
1992-06-23
Swinehart, Ed
Marine propulsion
Jet drive
Direction control for fluid jet
440 38, B63H 11113
Patent
active
051238675
ABSTRACT:
A jet propulsion unit is provided for marine craft where a stream of water is induced in a converging inlet section and delivered as a steady laminar shaped flow regime to an impeller section whose novel impeller/diffuser vane combination and converging annular volume enables operation of the vessel over a wide range of speeds and sea conditions without cavitation. Acceleration of water energized by the impeller through an interchangeable nozzle provides additional thrust and maneuverability. The propulsion unit additionally incorporates an arm-hole duct in the inlet housing for easy clean-up of any fouling and a bypass valve positioned upstream from the impeller to eliminate balling and drag caused thereby.
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Lundeen Daniel N.
Pryzant Andrew S.
Swinehart Ed
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