Marine propulsion – Jet drive – Having means to prevent clogging
Patent
1995-12-22
1997-08-19
Basinger, Sherman
Marine propulsion
Jet drive
Having means to prevent clogging
440 47, B63H 11103
Patent
active
056581769
ABSTRACT:
An improved water jet propulsion system for a jet propelled watercraft is disclosed designed to operate more efficiently. The improved propulsion system includes an adjustable water inlet duct, a larger pump, and an adjustable discharge nozzle. The inlet duct includes a hydraulically efficient inlet tunnel with an adjustable entrance opening which adjust in size according to the velocity of the water-craft in the body of water and the flow of water through the system. Using the inlet tunnel and the adjustable grate structure, the total dynamic head of the incoming water may be recovered at the pump. The pump is larger than typical pumps used on jet propulsion systems so that a greater flow of water at low head pressure may be delivered to the adjustable discharge nozzle. The adjustable feature on the discharge nozzle enables the flow through the system to be adjusted so that the hydraulic conditions on the pump are maintained at all boat speeds and all shaft rpm.
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Basinger Sherman
Storwick Robert M.
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