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Drainage disk for protecting weep channels of masonry floor drain construction

  • US 5,022,430 A
  • Filed: 01/09/1990
  • Issued: 06/11/1991
  • Est. Priority Date: 01/09/1990
  • Status: Expired due to Term
First Claim
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1. A drainage disk for placement around a drain opening in a floor of the type comprising a mortar layer, wherein the drainage disk is positioned between the floor pan and the mortar which is laid over the floor pan, said drainage disk comprisinga disk-shaped piece of relatively thin sheet material;

  • a central opening in the disk-shaped piece;

    a plurality of elongate valleys depressed in said disk-shaped piece, said valleys having inner and outer ends, with the valleys extending radially outwardly from the central opening in said disk-shaped piece; and

    a plurality of sharp pointed projections extend inwardly a uniform distance toward the center of said opening from the inner ends of said valleys to form a serrated periphery for the central opening in said disk-shaped piece.

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