Ships – Steering mechanism – Fluid pressure
Patent
1999-03-29
2000-01-04
Sotelo, Jesus D.
Ships
Steering mechanism
Fluid pressure
440 38, 440 49, 416244B, B63H 2546
Patent
active
060098228
ABSTRACT:
The bow or stern thruster is a steering device for commercial boats or for large yachting vessels. The thruster has a tunnel disposed transversely across either the bow or the stern of the boat. The tunnel has a tunnel flange secured to an opening in the tunnel. A multisection gearbox including a flange, a neck, a foot cap, and a hollow, cylindrical foot is mounted on the tunnel flange with the foot extending into the interior of the tunnel, being suspended by the neck. The gearbox houses a vertical gear shaft extending through the neck into the foot, which drives a pair of horizontal shafts extending through the foot in opposite directions by a spiral bevel gear coupling. The ends of the horizontal shaft are hollow and have a keyway defined therein. The horizontal shafts each receive a propeller integral with a keyed propeller shaft. The propellers rotate in opposite directions. The vertical shaft is driven by a motor or engine housed within the vessel, but outside the tunnel. A pair of screens having a cloverleaf formation are mounted within the tunnel on opposite sides of the propellers.
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Litman Richard C.
Sotelo Jesus D.
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