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US 4,874,132 AGranted
Drip irrigation apparatus
OwnerGideon Gileadinventor
Life of this patent
Estimating the term…
Abstract
Drip irrigation apparatus comprising an elongated element of uniform cross section including an extruded closed portion, the extruded closed portion being embossed to define a pressure reducing pathway. A water supply channel may be formed also by extrusion or by sealing of the edges of the elongated element.
Claims22
Drip irrigation apparatus comprising an elongated element of uniform cross-section including:
- a seamless leak resistant extruded closed portion defining first and second generally parallel and uniformly spaced main surfaces having a first cross-sectional extent and first and second side surfaces integrally joined to said first and second main surfaces and having a second cross sectional extent less than said first cross sectional extent, said seamless closed portion defining a volume therewithin;
- and
- at least one solid portion integrally formed therewith with said seamless closed portion and extending outwardly from at least one of said first and second side surfaces,
- said elongated element defining parallel side edges, said parallel side edges being joined to define a water supply channel having said extruded closed portion extending only over part thereof,
- at least one of said first and second main surfaces of said seamless extruded closed portion being embossed thereby defining adjacent portions of said first and second main surfaces at selected locations thereon,
- said first and second main surfaces being joined to each other at said selected locations at which at least one of said first and second main surfaces are embossed to define a pressure reducing pathway at locations wherein neither of first and second main surfaces are embossed or joined to each other, said pathway having a multiplicity of bends and turns and communicating with said water supply channel;
- and also comprising a water outlet permitting exit of water from said pressure reducing pathway.
4 more elements
A method for producing drip irrigation apparatus comprising the steps of:
- extruding an elongated element of uniform cross section including a seamless portion of closed cross section defining first and second generally parallel and uniformly spaced main surfaces having a first cross sectional extent and first and second side surfaces integrally joined to said first and second main surfaces and having a second cross sectional extent less than said first cross sectional extent, said seamless closed portion defining a volume therewithin and including at least one solid portion integrally formed therewith, said elongated element defining parallel side edges;
- embossing said seamless portion of closed cross section forcing portions of said uniformly spaced main surfaces into touching adjacent relationship at selected locations thereof;
- fusing said first and second main surfaces at said selected locations to define a pressure reducing pathway intermediate said selected locations and at locations wherein neither of said first and second main surfaces are embossed or joined to each other having a multiplicity of bends and turns;
- joining said parallel side edges to define a water supply channel having said extruded closed portion extending only over part thereof;
- and also comprising the step of providing a water inlet and a water outlet communicating with said pressure reducing pathway.
2 more elements
Dependencies are inferred from the claim text.