Resources Contact Us Home
Irrigation system

Image Number 2 for United States Patent #4928427.

A hollow, cellulose acetate fiber having a wall permeable to water is formed into a coil of constant dimensions. The coil is placed at the root level of the plants to be irrigated. Where the plants are spaced at intervals (as opposed to being immediately adjacent) a number of coil turns are positioned at the plant location and the coil stretched out between plant locations. In this manner, irrigation is concentrated at the plant and minimized in the intervening distance. Consequently, even though the coil is of constant dimensions and porosity, the quantity of water dispensed can be varied as desired. Similarly the spacing between parallel coils can be varied. This spacing variation is desirable where the pressure of the water varies because of height changes, on a slope for example. The subterraneon watering by coil has an additional beneficial effect because the roots of the plants tend to concentrate within the turns of the coil so as to become anchored thereto. This minimizes errosion of the soil around the plants whether caused by water or wind.

  Recently Added Patents
System for encrypting and decrypting a plaintext message with authentication
Method and apparatus for supporting HARQ
Integrated wire carrier for electrode array
Restarting event and alert analysis after a shutdown in a distributed processing system
Aqueous composition with agents to inhibit water evaporation
Inhibition of HRP-3 using modified oligonucleotides
Application authentication system and method
  Randomly Featured Patents
Method and device for controlling route and computer program therefor
Process for the preparation of 4-benzyl aspartate
Mortar sighting device
Combinatorial process for synthesizing azetidinone analogs
Etching methods, methods of removing portions of material, and methods of forming silicon nitride spacers
Check valve manifold assembly for use in angioplasty
Data processing system common bus utilization detection logic
Piezoelectrically actuated liquid metal switch
Electric drill
Image processing method and apparatus for performing notification of the presence of a file whose metadata is not generated when performing retrieval processing