Patent ID: 6855022
Filing Date: 2005-02-15
Classification: B63B,B63H

Abstract:
1. A personal watercraft comprising: a body including a hull and a deck; an engine mounted within the body; a first exhaust chamber disposed on one side of the body, the first exhaust chamber having a plurality of inner spaces defined by at least one separating wall to allow an exhaust gas from the engine to flow within the inner spaces; a second exhaust chamber disposed on an opposite side of the body to allow the exhaust gas from the first exhaust chamber to flow within the second exhaust chamber; a first exhaust pipe through which the engine and the first exhaust chamber communicate with each other, such that the exhaust gas from the engine is drawn into one of the inner spaces of the first exhaust chamber through the first exhaust pipe; a first inverted-U shaped pipe configured to extend from the first exhaust chamber to the second exhaust chamber such that the exhaust gas drawn into the first exhaust chamber through the first exhaust pipe is drawn from the first exhaust chamber to the second exhaust chamber through the first inverted-U shaped pipe; a second inverted-U shaped pipe configured to extend from the second exhaust chamber to the first exhaust chamber such that the exhaust gas drawn into the second exhaust chamber through the first inverted-U shaped pipe is drawn from the second exhaust chamber into another one of the inner spaces of the first exhaust chamber through the second inverted-U shaped pipe; and a second exhaust pipe configured to extend from the first exhaust chamber to an outside of the body such that the exhaust gas drawn into the first exhaust chamber through the second inverted-U shaped pipe is drawn from the first exhaust chamber to the outside of the body through the second exhaust pipe; wherein the first inverted-U shaped pipe and the second inverted-U shaped pipe are each positioned in a flow path of the exhaust gas and bent to be substantially inverted-U shaped.