Drip irrigation hose and method for its manufacture

  • US 5,634,595 A
  • Filed: 05/20/1996
  • Issued: 06/03/1997
  • Est. Priority Date: 07/19/1994
  • Status: Expired due to Term
First Claim
Patent Images

1. A drip irrigation hose comprising:

  • an elongated flexible strip of plastic film bent along its length to form a lapped longitudinal seam between opposing longitudinal margins of the film;

    means for interconnecting the opposing margins along their length to seal the overlapping longitudinal seam, thereby forming a flow regulating passage defined by the seam and a water supply passage defined at least in part by the remainder of the strip;

    a plurality of longitudinally spaced inlet ports to the flow regulating passage from the water supply passage;

    a plurality of longitudinally spaced outlet ports from the flow regulating passage displaced from the respective inlet ports to provide a substantial path length from each inlet port to a respective outlet port,wherein each outlet port comprises a single longitudinal slit in the strip, the slit being sufficiently long and the strip being sufficiently flexible so the water drips from the port when the hose is pressurized, the slit being sufficiently short and the strip being sufficiently rigid so the slit closes completely when the hose is depressurized.

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