Drip irrigation lines
OwnerAmir Coheninventor
Life of this patent
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Abstract
A drip irrigation line includes a plurality of emitter units secured within a water supply tube such that each emitter unit defines with the tube a flow-control passageway having an inlet port communicating with the interior of the water supply tube and an outlet port communicating with a water discharge opening in the water supply tube. Each emitter unit includes a one-way valve at one of the ports. Such port has an opening circumscribed by a cylindrical boss, and the one-way valve thereat includes a cap having a skirt of elastomeric material normally engaging the outer surface of the cylindrical boss to block reverse water flow into the flow-control passageway, but is deformable under water pressure to permit forward flow from the tube interior into the flow-control passageway.
Claims9
A drip irrigation line, comprising:
- a water supply tube for conducting water therethrough and having a plurality of water discharge openings spaced along its length;
- and a plurality of emitter units secured within the water supply tube such that each emitter unit defines with the tube a flow-control passageway having an inlet port communicating with the interior of the water supply tube, and an outlet port communicating with a water discharge opening in the water supply tube;
- each of said emitter units including a one-way valve at one of said ports permitting water flow in the forward direction from the interior of the water supply tube towards a respective water discharge opening thereof, but blocks water flow in the reverse direction from the respective water discharge opening towards the interior of the water supply tube;
- characterized in that said port which includes said one-way valve comprises an opening circumscribed by a cylindrical boss projecting from the downstream side of the opening facing the respective water discharge opening in the water supply tube;
- and in that said one-way valve includes a cap having an end wall engageable with the inner surface of said water supply tube, and a skirt of elastomeric material normally engaging the outer surface of the cylindrical boss to block water flow through said one-way valve, but deformable under water pressure to permit water flow in said forward direction.
Dependencies are inferred from the claim text.