Drain trap

Details Drain trap Drain trap

1997-09-12

1999-06-29

Upton, Christopher

Liquid purification or separation

Structural installation

Grated inlet surface drain

210164, 210238, 210462, 13724739, E03F 514

Patent

active

059164360

ABSTRACT:
A drain trap for a plumbing drainage system includes a drain pipe having an inlet end for fluid-connection to an area to be drained of liquid, and a discharge end. A drain cup is provided which includes a bottom wall and a side wall joined to the bottom wall. The side wall defines an open upper end which surrounds the discharge end of the drain pipe and is positioned within a portion of the drain cup to establish therebetween an annulus space to allow liquid flowing through the drain pipe to fill the drain cup and then overflow into plumbing associated with the drainage system. At least one pair of radially extending lugs are provided which are circumferentially spaced apart from one another about the drain pipe. The lugs are joined rigidly to both the drain pipe and the side wall of the drain cup to form an integral structure.

REFERENCES:
patent: 301151 (1884-07-01), Pietsch
patent: 578024 (1897-03-01), Perkes
patent: 873120 (1907-12-01), Dunstan
patent: 1175836 (1916-03-01), Stubbe
patent: 2074462 (1937-12-01), Dame
patent: 3042210 (1962-07-01), Hattori
patent: 4019326 (1977-04-01), Herveling et al.
patent: 4045346 (1977-08-01), Swasky
patent: 4669167 (1987-06-01), Asterlin
patent: 4910811 (1990-03-01), Izzi, Sr.

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