Patent ID: 6733349
Filing Date: 2004-05-11
Classification: B63H

Abstract:
A jet propulsion boat comprising:a hull having a bow, a stern and a central region disposed midway between the bow and the stern, a longitudinally disposed tunnel extending from the central region of the boat to the stern; a gasoline powered drive unit slidably mounted in the central region of the hull; a steering post supported in substantially vertical orientation on a top surface of the drive unit, and a steering wheel mounted on a top end of the steering post; a propeller shaft powered by the drive unit and extending through the hull into the tunnel, and a propeller mounted on a rear end of the propeller shaft; a pressure chamber positioned within the tunnel for housing the propeller and comprising upper half and lower half sections, the upper half section being integral with the boat hull, the lower half section being detachably mounted to the upper half section with bolts, wherein the pressure chamber has a constricting passage from an inlet opening to an exhaust opening; and a rudder disposed at the stern behind the exhaust opening of the pressure chamber, the rudder being manipulated by the steering wheel by means of bevel gears and transmission shaft.