Marine pump-jet propulsion system

Details Marine pump-jet propulsion system Marine pump-jet propulsion system

1973-09-25

1976-02-24

Halvosa, George E. A.

Ships

Building

Canal and ferry boats

60221, 114151, B63H 1102, B63H 2546

Patent

active

039397947

ABSTRACT:
This invention relates to mechanically-actuated ahead-and-astern propulsion of marine vessels by means of a reversible hydraulic-jet ejector structure composed in part of oppositely-directed ejector stagings disposed centrally within a longitudinal open-channel conduit formed into the hull of the vessel. The reversible ejector structure may be alternately actuated by members of an oppositely-directed pair of remotely-driven pump-jet rotor nacelles submerged within the open-channel conduit, and disposed to supply high-velocity motive fluid to their respective secondary-nozzle pair members of the oppositely-directed ejector stagings. The pump-jet rotor nacelles may be remotely driven by right-angle drive shafts housed within supporting structural struts, and actuated by machinery internal to the vessel. The rotor assembly of each pump-jet nacelle may include variable-pitch blading whose operating adjustment may regulate the quantity and velocity of motive fluid supplied to its respective ejector staging.

REFERENCES:
patent: 2440345 (1948-04-01), Neel
patent: 2735392 (1956-02-01), Cox
patent: 3185122 (1965-05-01), Pleuger
patent: 3447324 (1969-06-01), French

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