Method for making simultaneously at least two drip irrigation pipes
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United States of America Patent
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-
Aug 10, 2004
Grant Date -
N/A
app pub date -
Nov 8, 2002
filing date -
Nov 30, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention concerns a drip irrigation conduits (1) comprising a tube (2) designed to be connected to a pressurised water source. The tube is provided with two lateral lips (3a, 3b) superposed on each other and are formed integral with said tube. The conduit (1) further comprises, at intervals, flow cavities allowing water to trickle through (11) communicating the tube (2) inside with outside environment. The invention is characterised in that a strip (4) is fixed in sealed manner between the lips (3a, 3b), and the cavities. (11) are produced in said strip (4) by stamping said strip (10, 10A) so that they constitute through cavities substantially on either side of a longitudinal plane of symmetry (P) on the strip (10, 10A), each flow cavity (11, 11A) comprising at one first end a feed chamber (13) designed to emerge into one of said conducts and at the other end a discharge chamber (14) designed to emerge outside said one conduit; the stamping process being also designed so that the discharge chambers of the flow cavities located substantially on either side of the plane of symmetry (P) of the strip do not communicate with each other.
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