Liquid purification or separation – Flow – fluid pressure or material level – responsive – Discharge of treated material
Patent
1978-02-13
1980-06-10
Sever, Frank
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Discharge of treated material
55405, 55406, 55450, 210409, B01D 3516
Patent
active
042071810
ABSTRACT:
Filters self-cleaning by hydrocyclonic action are described, in which one end of the filter housing is mounted at a higher elevation than its opposite end, the filter housing having at its lower end a chamber for accumulating dirt particles washed from the outer surface of the filter body and a discharge port for purging the chamber. Several described embodiments include an auxiliary dirt-sensing filter within the latter chamber to receive on one side dirt particles accumulated in the chamber, its opposite side being connected to a source of lower pressure to produce a fluid flow through the auxiliary filter which flow is sensed to automatically open a valve to discharge the dirt particles accumulated in the chamber. Also described is an embodiment including a pump having a rotor disposed in the filter housing such that the hydrocyclonicly flowing water also drives the pump.
REFERENCES:
patent: 2557375 (1951-06-01), Dickenson
patent: 4042504 (1977-08-01), Driori
patent: 4048067 (1977-09-01), Cheng
Barish Benjamin J.
Sever Frank
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