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Drain

  • US 4,694,513 A
  • Filed: 01/22/1987
  • Issued: 09/22/1987
  • Est. Priority Date: 01/22/1987
  • Status: Expired due to Fees
First Claim
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1. A floor drain for use in a floor of solidified poured material overlying a temporary sub form base comprising:

  • a base member having a tubular, upstanding, internally screw-threaded tubular segment and a horizontal bottom flange extending laterally outward from said tubular segment for attachment to the form base;

    a body member having an externally screw-threaded annular wall which threadedly engages said internally screw-threaded tubular segment of said base member, a smooth-walled cylindrical lower projection extending down below said annular wall at the lower end of said body member, said lower projection having a smaller inside and outside diameter than the inside diameter of said annular wall, an annular upper projection extending up above said annular wall, said upper projection having internal and external screw threads and having a smaller inside and outside diameter than said annular wall, and an annular top flange extending horizontally outward past the upper end of said annular wall;

    a deformable annular membrane overlying said top flange and the upper end of said body member laterally outward from said upper projection;

    an annular membrane retainer overlying said membrane across and beyond its entire extent;

    a ring overlying said membrane retainer for part of its lateral extent, said ring having internal screw threads which threadedly engage said external screw threads on said upper projection of said body member and holding said membrane retainer down to clamp said membrane against the top of said body member;

    and an annular strainer holder having an externally screw-threaded lower end segment threadedly engaging said internal screw threads on said upper projection of said body member, said strainer holder having an annular flange on its upper end extending laterally outward beyond its screw-threaded lower end segment and across the top of said ring, said flange on the strainer holder presenting an upwardly-facing annular seat for receiving a perforated strainer.

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