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Slotted drainage conduit and integral concrete floor

  • US 3,898,778 A
  • Filed: 01/10/1974
  • Issued: 08/12/1975
  • Est. Priority Date: 01/10/1974
  • Status: Expired due to Term
First Claim
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1. A method of forming a slotted drainage conduit comprising:

  • forming a trench in the ground;

    laying a concrete base in the bottom of the trench;

    placing an inflatable tube on said base;

    inflating the tube, the transverse dimension of the tube when inflated being less than the width of the trench;

    holding the tube against substantial lateral movement on the base when the tube is inflated;

    pouring concrete in the trench onto the base and about and along the tube when the latter is inflated and held on said base;

    maintaining a region extending upwardly from the tube free of concrete as concrete is poured about the tube;

    allowing the concrete about the tube to set to a hardened condition to thereby form a conduit having a slot through said region; and

    deflating the tube and removing the same from the conduit.

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