Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Image coding apparatus and image decoding apparatus
Polyfunctional sulfur-containing epoxies and compositions thereof
System for implementing dynamic pseudorandom keyboard remapping
Coreference resolution in an ambiguity-sensitive natural language processing system
Wireless enclosure
(4940
Electro-optical device, method of manufacturing the same, and electronic apparatus
  Randomly Featured Patents
Textile strand control device
Friction bearing
Method of estimating residual capacity of battery
Stabilized non-lethal projectile systems
Printer
Siloxane monomers and oligomers
Shoe upper
Cache with enhanced victim selection using the coherency states of cache lines
Non polar tantalum capacitor
Computing device