Patent Number: 6,250,978

Title: Steam phase change waterjet drive

Abstract: A waterjet drive engine for the propulsion of large ships includes an elongated water conduit having a rearwardly directed exhaust portal, a forward extremity having a water intake portal, and a middle portion of larger diameter than the diameter of the exhaust portal. A hollow axially symmetrical chamber is centrally positioned within the middle portion, defining therewith an annular interstitial zone through which ambient water is caused to flow. A shaft driven by the ship's power system extends into the chamber and is provided with a circular array of propulsion blades positioned within the interstitial zone and adapted to force water rearwardly. A plurality of nozzles enter the chamber and direct high pressure steam toward the exhaust portal. The effect of the steam is to add an augmenting force to the rotative motion of the shaft.

Inventors: Corliss; Joseph J. (Rockville, MD)


International Classification: B63H 11/00 (20060101); B63H 11/12 (20060101); B63H 011/00 ()

Expiration Date: 06/26/2018