Patent ID: 6192817
Filing Date: 2001-02-27
Classification: B63B,B63H,F01N,F02B

Abstract:
A watercraft for movement in water comprising:a board having a stem and a stem and defining an interior compartment extending therebetween and a longitudinal axis therethrough;an internal combustion engine housed within said interior compartment, said internal combustion engine generating an output force and exhaust fumes;a pump connected to said internal combustion engine for receiving said output force to pump a portion of the water therethrough; andan exhaust assembly including an exhaust pipe extension having an extension bend and a expansion chamber to cool and muffle the exhaust fumes, said expansion chamber defining a top and a bottom, said expansion chamber having an inlet disposed adjacent said top of said expansion chamber and an outlet disposed adjacent said bottom of said expansion chamber wherein said exhaust pipe extension extends through said inlet of said expansion chamber in a manner such that said exhaust pipe extension is directed toward said outlet at said bottom of said expansion chamber due to said extension bend in said exhaust pipe extension.