Fluid handling – With liquid valves or liquid trap seals – Liquid seal in liquid flow line; flow liquid forms seal
Patent
1976-05-20
1978-02-21
Nilson, Robert G.
Fluid handling
With liquid valves or liquid trap seals
Liquid seal in liquid flow line; flow liquid forms seal
13724727, 13761416, 1376142, E03C 1286, E03C 1288
Patent
active
040746860
ABSTRACT:
A trap for a drain has a housing with a lateral exit port for water flowing in through an apertured lid and/or through a lateral entrance port. A tubular insert fitted to the sidewall with the exit port has a bottom inlet beneath the level of that port and a side outlet provided with a check valve in the form of a hinged flap swinging outwardly into the exit port. In one embodiment, the flap comes to rest on the broad end of a frustoconical shutter rotatably seated in the upper end of the insert which is separated by a correspondingly curved partition from the lower end; the shutter and the partition have apertures which normally register with each other but can be disaligned by a rotation of the shutter about a horizontal axis with the aid of a handle secured to it inside the housing and accessible upon removal of the lid. In another embodiment, a similarly accessible handwheel atop the insert has a tubular shaft threadedly engaging a vertical leadscrew rising from a shutter disk which lies between the bottom opening and a horizontal partition having an aperture that is closable by the disk from below.
REFERENCES:
patent: 873518 (1907-12-01), Donat
patent: 3491796 (1970-01-01), Scaramucci
Nilson Robert G.
Ross Karl F.
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