Liquid purification or separation – Flow – fluid pressure or material level – responsive – Float
Patent
1996-11-26
1998-10-13
Upton, Christopher
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Float
2102421, 210540, B01D 2124
Patent
active
058207511
ABSTRACT:
The apparatus of the invention has a float portion, a drain head portion, and an outlet pipe portion which are sequentially connected. The float pivotally supports the drain head slightly below the surface of water in a sediment basin. The outlet pipe is connected rigidly to the drain head at the inlet end and flexibly to a drain line at the outlet end. As the water fills and is drained from the sediment basin, the float and drain head are gradually raised and lowered and the outlet pipe approaches horizontal. The float surrounds the drain head and has a debris guard which is pivotally mounted to keep a gap preventing debris from entering the outlet pipe closed. An orifice within the outlet pipe and an air vent connected thereto are variable to control the water flow rate from the basin.
REFERENCES:
patent: 882030 (1908-03-01), Travlson et al.
patent: 1107391 (1914-08-01), Welch
patent: 1450545 (1923-04-01), Hans
patent: 2330508 (1943-09-01), McCon
patent: 2858843 (1958-11-01), Muller
patent: 2957579 (1960-10-01), McCombie
patent: 4405458 (1983-09-01), McHugh, Jr.
patent: 4892666 (1990-01-01), Paulson
patent: 4906366 (1990-03-01), Moore
patent: 4973405 (1990-11-01), Kozey
patent: 5113889 (1992-05-01), McGuire, Jr.
Paper entitled "Automatic Device for Emptying a Detention Pond at a Constant Floe Rate and Velocity" by Joseph Adler, 1981.
Paper entitled "Experimental Dewatering Device to Improve Sediment Basin Efficiency" by Warren Faircloth, 1995.
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