Watercraft and waterjet propulsion system
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United States of America Patent
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-
Apr 8, 2008
Grant Date -
N/A
app pub date -
Sep 23, 2003
filing date -
Sep 23, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a watercraft with an improved waterjet propulsion system. The present invention further relates to a waterjet propulsion system with an improved steering nozzle design. The watercraft preferably is either what is known as a jet ski, a boat or a ship. A watercraft can be propelled by the thrust produced by a high-speed waterjet discharged from a nozzle located at the rear of the watercraft. A device that enables this type of propulsion is called a waterjet propulsor or a propulsor. Larger watercraft, such as a boat or a ship may often have two or more waterjet propulsors. The improved steering nozzle design incorporates a groove(s) or a channel(s) that is formed or machined into the steering nozzle wall thickness and does not exceed the thickness of the wall. The groove(s) or channel(s) begins at a point between the steering nozzle inlet and exit and ends at a point near or at the exit of the steering nozzle. The groove(s) or channel(s) is preferably recessed into the interior surface of the steering nozzle.
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