Ships – Submersible device – Diver assistance device
Patent
1994-11-21
1995-11-28
Sotelo, Jesus D.
Ships
Submersible device
Diver assistance device
440 38, B63C 1146
Patent
active
054698030
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention concerns an electric propulsion device intended for underwater diving.
BACKGROUND OF THE INVENTION
Conventional underwater propulsion systems are formed in the manner of torpedoes and the principal flow resulting from rotation of the propeller is ejected along the axis of symmetry of the device.
The diver must therefore be offset with respect to this axis, and the beam in the direction of the displacement becomes increased.
There thus results a rocking force, operator fatigue, and energy loss. On the other hand, the maneuverability is strongly affected by the relative position of the diver with respect to the propulsion device. High speeds cannot be attained by this type of device.
FIG. 1 shows such a conventional propulsion device, in which the diver must be shifted along the axis OZ so as to be displaced above the turbulence generated by the propeller.
One prior art solution consists of placing two turbo-motors on both sides of the propulsion device, as shown in DE-A-35 23 758, but this solution is complex and costly.
SUMMARY OF THE INVENTION
The present invention allows the performance of the propulsion device to be improved, and its operational control to be facilitated. To this end, the propulsion device is constituted by a symbolic hyperform symmetrical with respect to the displacement plane OXY of the diver, shown in FIG. 2. This shape employs the equivalent of two hydrofoil plates profiled along the axis OX of displacement.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 depicts a conventional propulsion device, in which the diver must be shifted along the axis OZ so as to be displaced above the turbulence generated by the propeller.
FIG. 2 depicts a diver using a propulsion device according to the invention.
FIG. 3 is a plan view of one embodiment of the present invention.
FIG. 3a is an elevational view of FIG. 3.
FIG. 3b is a view of FIG. 3 taken along line 3b--3b of FIG. 3.
FIG. 4 shows a diver equipped with a propulsion device according to the present invention.
FIG. 5 is a perspective view partially cut away of the propulsion device of the invention.
FIG. 6 is a plan view of the propulsion device of the present invention with the top removed to show the inside thereof.
FIG. 7 is a view of the right wing of FIG. 6 showing the dynamic aspect of the water flow.
FIG. 8 is a plan view of another embodiment of the present invention.
FIG. 8a is an elevational view of FIG. 8.
FIG. 8b is an enlarged cross section of the nozzle 33 taken along line 8b--8b of FIG. 8.
FIG. 9 shows a plan view of the present invention depicting a perfectly balanced propulsion device according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
FIG. 2 shows the basic principle of the propulsion device according to the invention. The diver holds the device at the ends of his arms along the axis of displacement, and the water is sucked in through a forwardly located opening 1. The inlet flow is then divided into two symmetrical transferences, and discharged on both sides of the diver. The two secondary flows 2 are partially divergent, to improve the hydrodynamics and the propulsion generated by reaction.
The shape and the stability of such a propulsion device according to the invention, permits the diver to control the rolling and rocking forces.
Zig-zag maneuvering is facilitated by the flattened shape of the body in the plane OXY. For improved directional control, an aileron 6 may be mounted as shown in FIG. 3, which shows in three views the overall shape of the device resulting from an initial purely aesthetic study to which successive functional features were applied according to the desired technical results.
Thus, the wing profile chosen for the body is neutral, as shown at detail 5 in FIG. 3, since when diving the weight is compensated by the hydrostatic pressure and no dynamic lift should occur during travel.
Two headlights 8 and a speed control 7 may be built into the device.
Moreover, the remotely positioned batteries permit replacing weights normally used to neu
REFERENCES:
patent: 2722021 (1955-11-01), Keogh-Dwyer
patent: 3503356 (1970-03-01), Wilson
patent: 3721208 (1973-03-01), Lampert et al.
Fem-Aero
Sotelo Jesus D.
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