Liquid purification or separation – Structural installation – Grated inlet surface drain
Patent
1979-01-12
1981-04-14
Wyse, Thomas G.
Liquid purification or separation
Structural installation
Grated inlet surface drain
4289, E03F 506
Patent
active
042618240
ABSTRACT:
A floor drain for showers or the like includes a cylindrical drain body having an externally threaded upper portion and a flange extending radially outwardly from the upper end thereof. A threaded nut is secured to the externally threaded portion and opposed to the flange for clamping the floor therebetween. The lower portion of the drain body comprises a concentric cylindrical member of smaller diameter joined to the upper portion by an annular shoulder. The inside diameter of the lower portion is dimensioned to receive a standard drain pipe. An inner strainer is provided to rest on the interior surface of the annular shoulder, and an outer strainer is snappingly secured in an annular groove adjacent to the upper end of the bore in the drain body. Alternatively, a spider may be permanently secured in place of the inner strainer.
REFERENCES:
patent: 2003770 (1935-06-01), Goodbart
patent: 3040895 (1962-06-01), Sisk
patent: 3411628 (1966-11-01), Mason
patent: 3713539 (1973-01-01), Thompson et al.
patent: 4035297 (1977-07-01), Aldridge et al.
Wyse Thomas G.
Zimmerman Harris
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