Fluid sprinkling – spraying – and diffusing – With cutoff or flow varying means operated by means...
Patent
1998-12-07
2000-03-21
Morris, Lesley D.
Fluid sprinkling, spraying, and diffusing
With cutoff or flow varying means operated by means...
239 75, 239 76, 239266, B05B 1208, B05B 120
Patent
active
060392673
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to self-regulated fertilizing irrigation systems and more specifically to systems of the kind described in prior Italian patent no. 1,061,205, which comprise a source of pressurized liquid, a duct made of flexible material, a plurality of spaced dispensers, and a regulator valve which is interposed between the source and the first dispenser of the duct.
Such systems are filled periodically, and after each filling the regulator valve, by comparing the delivery pressure with the pressure in the last portion of the duct, cuts off the delivery of the source, connecting the first portion of the duct to the discharge. Because of the consequent pressure decrease in said first duct portion, each one of the subsequent portions discharges in succession the accumulated volume of liquid through the dispenser which is arranged upstream of it with respect to the source. For this purpose, each dispenser is provided with a differential membrane valve which during filling cuts off the discharge port of the dispenser, allowing the liquid to pass from one duct portion to the other, and during discharge cuts off the passage of the liquid between the adjacent duct portions, simultaneously uncovering the discharge port of the dispenser interposed between them.
Each dispenser discharges, during each cycle, an amount of liquid (the so-called "trickle") which corresponds to the volume stored in the respective pressurized duct portion and dispenses said amount with a pressure which decreases rapidly starting from the maximum supply pressure.
Accordingly, in conventional systems, which are generally supplied at low pressure, the dispensers are directed exclusively towards the ground in order to concentrate irrigation at the base of the crops, since they are unable to effectively dispense a jet of water directed towards the head of said crops, owing to the sharp degradation of the pressure.
This is a drawback and a shortcoming of conventional systems of the specified type, which cannot be used for leaf treatments, irrigation or fertilizing irrigation, or for conventional frost protection treatments which cover the buds with a shield of ice obtained by spraying with nebulized water jets.
SUMMARY OF THE INVENTION
A principal aim of the present invention is substantially to eliminate these and other drawbacks of conventional systems, and within the scope of this general aim an important object of the present invention is to provide a system which is of the specified type but is "multifunctional", i.e., has improved dispensers which can dispense the irrigation or fertilizing irrigation or treatment liquid both onto the ground and selectively or simultaneously on the foliage of the crops according to the requirements of the various programmed actions.
Another object of the present invention is to provide a system which includes frost protection means constituted by diffusers adapted to form snow instead of ice, as in those currently commercially available.
Another important and particular object of the present invention is to provide a fertilizing irrigation system with improved dispensers which are adapted to produce selective dispensing on the ground or on the foliage of crops automatically according to the corresponding selective activation of pumping elements which are subjected to automatic control means.
Another important object of the present invention is to provide a system which is easy and handy to manage, allows extensive programmability of the operating sequences, and significantly reduces water and energy consumptions for an equal efficiency of the irrigation and/or fertilizing irrigation treatments.
According to the present invention, this aim and other important objects are achieved by providing a system of the cited type, having the specific characteristics stated in the appended claims.
Substantially, the present invention is based on the concept of improving the irrigation system, by providing it with dispensers which have two ports each, one for ground dispen
REFERENCES:
patent: 4176791 (1979-12-01), Cattaneo et al.
patent: 4177947 (1979-12-01), Menzel
patent: 5465905 (1995-11-01), Elder
Consulagri S.r.l.
Josif Albert
Morris Lesley D.
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