Fluid sprinkling – spraying – and diffusing – Conduit or nozzle attached irrigation-type decelerator
Patent
1985-09-11
1987-03-31
Peters, Jr., Joseph F.
Fluid sprinkling, spraying, and diffusing
Conduit or nozzle attached irrigation-type decelerator
239109, 239272, 251126, 138 42, B05B 130
Patent
active
046536957
ABSTRACT:
A drip irrigation emitter which provides for varying the length of the water flow path through the emitter in proportion to the pressure applied to it from the irrigation system. A housing defines an internal chamber in which a piston is disposed. The housing has an inlet at one end and an outlet at the other end. The inner dimensions of the outlet end of the housing are reduced to generally conform with the periphery of the piston. The inlet end of the chamber is enlarged relative to the piston to allow generally free flow of water therearound. A generally helical groove extending along the periphery of the piston forms a water turbulence-producing passageway which varies in length depending upon the position of the piston within the outlet end of the chamber. A spring biases the piston toward the inlet end of the chamber. Pressurized water in the inlet end of the chamber moves the piston against the spring toward the outlet end. The piston position, and therefore water passageway length, is directly proportional to the water pressure. Water flow at lower water pressures may also be controlled by providing a cavity in the chamber adjacent the inlet which mates with a corresponding extending end of the piston. A channel extending along the piston end limits the fluid flow until fluid pressure forces the piston end out of the cavity.
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Drip Irrigation Systems, Ltd.
Malpede Scott D.
Peters Jr. Joseph F.
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