Power plants – Reaction motor – Motive fluid principally liquid
Patent
1985-05-21
1987-09-22
Casaregola, Louis J.
Power plants
Reaction motor
Motive fluid principally liquid
60232, 415209, 415210, 415213C, 415217, 440 67, 114166, B63H 1100, F04D 700, B03H 116
Patent
active
046946454
ABSTRACT:
A propeller assembly, a so-called rotatable thruster, for propelling, manoeuvering, steering and/or positioning a watercraft, floating docks, pontoons and in particular offshore platforms, includes a propeller (1) having an embracing propeller shroud (2) and mounted on a propeller shaft journalled in a gear housing (3). The gear housing accommodates a bevel gearing through which the propeller shaft is connected to a drive shaft extending through a tubular support strut (4), which is connected at its lower end to the gear housing in order to support the same. The upper end of the support strut is arranged to be rotatably mounted in an opening in a bottom part of the hull of the watercraft, with the propeller shaft extending substantially horizontally, so that the drive shaft can be connected to drive machinery located within the hull and such that the assembly can be rotated about a rotational axis coinciding with the axis of the drive shaft, by means of rotational machinery located within the hull. The propeller shroud (2) is provided with means, for example guide vanes (10) and/or is in itself designed such that the propeller jet exiting from the shroud is directed slightly obliquely downwardly in relation to the direction of the propeller shaft. Advantageously there are arranged in the vicinity of the shroud outlet horizontal guide vanes (11) which deflect the propeller jet obliquely downwardly and radial guide vanes (12) which eliminate rotational movement in the propeller jet.
REFERENCES:
patent: 2369279 (1945-02-01), Carnaghan et al.
patent: 3137265 (1964-06-01), Meyerhoff
patent: 3314392 (1967-04-01), Molas et al.
patent: 3457891 (1969-07-01), Clark et al.
patent: 3528382 (1970-09-01), Clark
patent: 3799103 (1974-03-01), Granholm
patent: 3980035 (1976-09-01), Johansson
patent: 4046096 (1977-09-01), Liaaen
Bjorheden Orvar
Flyborg Nils O.
Casaregola Louis J.
Kamewa AB
Thorpe Timothy S.
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