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
System and method for redirected firewall discovery in a network environment
User interfaces
Replacing memory pointers with implicit pointers to be used in compiler-generated debug output
Using interrupted through-silicon-vias in integrated circuits adapted for stacking
Proton conducting electrolytes with cross-linked copolymer additives for use in fuel cells
Target trading system and method
Light receiving element with offset absorbing layer
  Randomly Featured Patents
Organic EL display device and method of encapsulating the same
Clamping device
Fluidized bed with spray nozzle shielding
Replaceable surface band wheel
Camcorder
Stage of variable-pitch vanes for a turbomachine
Step motor driving method and apparatus for performing PWM control to change a step drive signal on-duty ratio
Plants and seeds of corn variety CV729740
Neutron generator
D.C-D.C. converter for converting an unstabilized D.C.-voltage to three stabilized D.C.-voltages