Pumps – Motor driven – Fluid motor
Patent
1983-07-05
1985-11-19
Smith, Leonard E.
Pumps
Motor driven
Fluid motor
417588, F04B 4708
Patent
active
045539103
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a pump for pumping fluids, and an apparatus which may incorporate the pump, for pumping fluids from a reservoir to a predetermined location. In particular, the present invention relates to a pump and an apparatus for pumping water.
Generally a water pump functions by performing two operations either alternately or simultaneously. First, the water to be pumped is drawn from a water source into the water pump, and second, the water is expelled from the water pump by way of a conduit to a desired location.
With regard to the first operation, in view of atmospheric pressure and frictional resistance considerations, it is necessary to locate the pump in close proximity to the water source. As a consequence, the energy to actuate the pump has to be brought to the pump at the water source. Traditionally, this has been accomplished in the following ways:
1. Electricity is carried to the water pump, either on poles or underground. The disadvantage with this arrangement is that in many instances the water pump is remote from existing power lines and thus power lines have to be laid to the water pump. This is both inconvenient and expensive.
2. A petrol or diesel engine is positioned adjacent the water pump and the water source. The disadvantage with this arrangement is that, although the initial cost is generally lower than that required with the laying of electricity power lines, petrol or diesel engines are generally more expensive to operate due to fuel costs and are inconvenient with respect to maintenance required, pollution and noise.
3. A windmill is positioned in close proximity to the water pump and the water source. The disadvantage with this arrangement is that windmills have poor efficiency in hilly country. The reason for this is that since a water source is likely to be located in low lying areas the windmill must also be located in the low lying areas and thus would be sheltered from the wind required to operate the windmill.
4. A farm tractor is coupled to the water pump and operated to power the water pump. The disadvantage with this arrangement is that while the tractor is being used to power the water pump the tractor cannot be used for other purposes.
A so-called injector pump has been proposed to avoid the necessity to locate the water pump in close proximity to the water source. The injector pump may be located remote from the water source and connected to the water source by two conduits. One conduit delivers fluid to an injector/venturi apparatus at or in the water source and this causes fluid to be drawn into and delivered through the other conduit back to the pump outlet. The disadvantages with this arrangement are that there are practical limits with respect to the distance over which injector pumps will operate efficiently, and the energy input to operate the injector pump is high and the two conduits are necessarily large in diameter and therefore expensive.
It is an object of the present invention to provide an apparatus for pumping fluids which alleviates the disadvantages of the known apparatus described in the preceding paragraphs.
It is also an object of the invention to provide an improved hydraulically operated fluid pump which is particularly suited for use in the apparatus of the invention for pumping fuilds.
According to the present invention there is provided an apparatus for pumping fluid from a fluid source to a predetermined location, the apparatus comprising:
(a) an hydraulically operated pump adapted to be positioned in fluid communication with the fluid source, the pump having a pump chamber and a means for storing potential energy,
(b) a conduit connectible to the pump and to a supply of hydraulic fluid positioned remote from the pump,
(c) a control means operatively connectible to said conduit to periodically allow pulses of hydraulic fluid to be transmitted into said conduit from said supply of hydraulic fluid to actuate said pump,
whereby in use a portion of the energy of each pulse of hydraulic fluid received by the pump is stored as
REFERENCES:
patent: 1946723 (1934-02-01), Thompson
patent: 2445205 (1948-07-01), Burn
patent: 2578050 (1951-12-01), Peters
patent: 4013385 (1977-03-01), Peterson
patent: 4021149 (1977-05-01), Rutenberg et al.
patent: 4390236 (1983-06-01), Callicoatte
Nebo Pumps Pty. Ltd.
Smith Leonard E.
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