Patent Number: 6,332,816

Title: Jet-propelled boat

Abstract: In a jet-propelled boat, a nozzle of a jet pump is constructed so as to berotatable in response to steering by a rider of the boat in order tochange a course of the boat. A rudder, that does not project downwardsfurther than a boat bottom, is attached to an outer surface of the nozzle.A jet pump channel is provided for guiding a water flow to the jet pump. Arudder channel is provided separate from the jet pump channel and guides awater flow to the rudder. When a driving speed of the jet pump is stoppedor slowed, the rudder will enable the course of the boat to be steeredwhen the boat continues to move through the water due to its own inertia.The steering occurs because the direction of the nozzle and hence therudder can be controlled by the boat's rider, and water will continue tobe delivered to the rudder via the rudder channel. The rudder may beduct-shaped. Further, a plate may be provided to selective block an inletof the rudder channel, with the plate opening the rudder channel when adriving speed of the jet pump is a prescribed value or less.

Inventors: Tsuchiya; Masahiko (Saitama, JP), Abe; Tomohisa (Saitama, JP)


International Classification: B63H 25/06 (20060101); B63H 25/00 (20060101); B63H 11/00 (20060101); B63H 25/38 (20060101); B63H 11/113 (20060101); B63H 25/52 (20060101); B63H 011/113 (); B63H 011/107 ()

Expiration Date: 12/25/2014