Retractable bow thruster

Details Retractable bow thruster Retractable bow thruster

1980-01-25

1981-10-13

Prunner, Kathleen J.

Ships

Steering mechanism

Fluid pressure

440 53, B63H 2542

Patent

active

042941865

ABSTRACT:
The device comprises a main support housing which is secured to the hull of a vessel. An opening is made within the lower portion of the housing through the vessel hull to allow a thruster drive assembly to lower into operative position. The drive assembly includes an upper gear housing which mounts a drive gear. The upper gear housing is pivotally mounted for rotation about the axis of rotation of the drive gear. The opposite end of the upper gear housing is pivotally attached to a vertically displaceable lower gear housing which mounts an idler gear and a propeller. The idler gear drives a ring gear disposed about the propeller. When the upper gear housing is moved about its pivot axis, the lower gear housing moves vertically causing the propeller to move from a recessed position to an operative position below the bow of the boat to provide lateral thrust to the boat.

REFERENCES:
patent: 3487805 (1970-01-01), Satterthwaite et al.
patent: 3550547 (1970-12-01), Pleuger et al.
patent: 3587512 (1971-06-01), Patterson

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