Ships – Steering mechanism – Rudders
Patent
1996-09-30
1997-10-07
Avila, Stephen
Ships
Steering mechanism
Rudders
114274, 440 66, 440 71, B63H 2506
Patent
active
056736436
ABSTRACT:
A hydrofoil wing structure is disclosed to be employed as an accessory for a marine propulsion device, to be disposed above and mostly aft of the propelling means of such a device, to contour and concentrate the kinetic energy in the hydrodynamic vortex created by the propelling means; to reduce turbulence, vibration and noise by reflecting acoustic energy downwardly from the surface of the water; to increase the efficiency of such a device powered by an electric battery; to improve the steering and maneuverability of the vessel by providing a rudder for the device; and to serve as a guard preventing the propelling means from entanglement in vegetation or its damage from submerged objects, and to similarly shield a sonar transducer or other instrument used in conjunction with the device for finding fish or gauging the depth of the water.
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patent: 4944702 (1990-07-01), Cain
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patent: 5194025 (1993-03-01), Blanchard
patent: 5207605 (1993-05-01), Kroeber
patent: 5231950 (1993-08-01), Poulos
Avila Stephen
Spangler Jeffrey T.
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