Centrifugal pump and paddle boat propulsion system

Ships – Building – Canal and ferry boats

Patent

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Details

115 11, 115 49, 60221, 114 58, B63H 1102

Patent

active

041716752

ABSTRACT:
A radially vaned rotor is mounted for rotation about a horizontal axis extending athwartships of a boat. A housing encircles the major portion of the rotor and has an axial inlet and a downwardly directed peripheral outlet. The tips of the rotor vanes project through the housing peripheral outlet below the surface of the water surrounding the boat. When the boat is traveling at low speed, the rotor functions as the impeller of a centrifugal pump drawing water into the housing through the axial inlet and discharging the water through the peripheral outlet to propel the boat. The outlet can be shifted circumferentially fore and aft to alter the direction of water discharged therethrough. At high speed, planing of the boat elevates the housing so that only air is drawn through its axial inlet and discharged through its peripheral outlet, the majority of boat-propelling force being produced by the paddle wheel action of the rotor vane tips.

REFERENCES:
patent: 849238 (1907-04-01), Hector
patent: 3034295 (1962-05-01), Hanley
patent: 3076427 (1963-02-01), Stapleton
patent: 3155071 (1964-11-01), Buttner
patent: 3224408 (1965-12-01), Seredda
patent: 3759213 (1973-09-01), Quady
patent: 4004544 (1977-01-01), Moore

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