Marine propulsion – Jet drive
Patent
1996-05-13
1999-07-13
Basinger, Sherman
Marine propulsion
Jet drive
440 42, B63H 1108, B63H 11113
Patent
active
059218258
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention refers to a high speed boat in which is used a pump driven by a driving motor constituted by for instance a petrol engine or a diesel engine. The pump pumps up water and generates a jet which can be directed and given different pressures, whereby such a boat can be propelled at a high velocity. Known boats has the driving motor directly coupled to the shaft of the pump and this has among other things the drawback that it becomes necessary to sometimes use a gear-box between the motor and the pump shaft. Further the shaft that drives the pump gives rise to certain flow problems.
SUMMARY OF THE INVENTION
The object of the present invention is to create a high speed boat of aforementioned type in which a gear-box can be dispensed with and where the pump can be operated continuously. According to the invention this is made possible by the pump shaft being arranged parallel to the driving shaft of the engine and these two shafts located at a distance from each other. Directly on the driving shaft or on a wheel located on the driving shaft a driving belt is applied, which is placed over the external peripheral ring of the pump wheel. As mentioned the use of a gear-box thereby is avoided and further water flow disturbances of a driving motor shaft interconnected with a pump shaft are eliminated.
According to an advantageous embodiment of the present invention the peripheral ring of the pump is applied outside the stern of the boat and the same applies to the free end of the shaft of the driving motor so that the driving arrangement of pump ring, driving belt and engine driving shaft are located completely outside of the boat and form a single unit.
According to an advantageous embodiment of the invention the pump ring, the driving belt and driving shaft wholly or partly are encapsulated in a protection housing.
Further features concerning the present invention appear from the subsequent claims.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be described in closer detail in connection with two drawings enclosed, in which
FIG. 1 shows a lateral view of the high speed boat,
FIG. 2 shows the same boat seen from above,
FIG. 3 shows the stern of the boat according to the preceeding figures,
FIG. 4 shows an encapsulated driving arrangement, and
FIG. 5 shows an illustration of a pump with a control nozzle for an emitted water jet.
DETAILED DESCRIPTION OF THE INVENTION
In the figures the designation 8 refers to a high speed boat which contains a driving motor 10 and drives a pump shaft 17 with an adjustable outlet nozzle 15. The boat is arranged with a water intake 9 that provides the pump with water. As clearly and distinctly appears from of FIG. 3 as the rear end of the pump 11 is shown, where a driving belt 7 is placed over the peripheral ring of the pump and the driving shaft 14 of the driving motor 10. The pump ring, the driving belt and the driving shaft 14 of the engine 10 are located outside the stern of the boat 8. These three elements may easily be encapsulated in a housing 16 as clearly and distinctly is shown in FIG. 4. Consequently one has obtained a very convenient unit to mount at the stern of the boat 8. The pump 11 is on its outside provided with an adjustable outlet nozzle 15 which can be adjusted into different directions, in order to change direction of travel. The speed of the boat is controlled by the pump pressure.
The designation 14A refers to a coupling that joins the outgoing shaft of the driving motor 10 to a driving unit which constitutes the continuation of the shaft over which the driving belt 7 is going to be placed. The driving belt 7 runs further about the external circumference of the pump wheel about a ring which is opposite to the pump wheel hub 6 and between which ring and hub the pump blades 5 are arranged.
In FIG. 5 the nozzle is also shown which is utilized for directing the water jet. The nozzle is consequently pivotable partly about a horizontal axis, partly about an axis perpendicular to said axis.
By the u
REFERENCES:
patent: 1759511 (1930-05-01), Kort
patent: 3198158 (1965-08-01), Winter
patent: 3977353 (1976-08-01), Toyama
patent: 5181868 (1993-01-01), Gabriel
Basinger Sherman
Bell Michael J.
Riffe Timothy W.
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