Liquid purification or separation – Flow – fluid pressure or material level – responsive – Discharge of treated material
Patent
1993-02-24
1995-05-23
Drodge, Joseph W.
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Discharge of treated material
210168, 2102571, 210341, 210418, 184 624, B01D 2992
Patent
active
054178495
ABSTRACT:
A machine tool coolant filtering system (10) is disclosed as including a plurality of coolant filter tanks (12). Each filter tank (12) is designated for receiving coolant carrying a different material contaminant. A fluid control communication system (22) controls the communication of coolant from the machine tools to the coolant filter tanks (12). A liquid level sensor (40) senses coolant level within a respective tank (12). A modulating valve (46) in communication with the liquid level sensing means (40) senses the liquid level in the respective tank (12). If the coolant level in its respective tank (12) falls below a threshold range, the respective modulating valve (46) is closed to restrict coolant from being removed from its respective tank (12) to maintain the coolant level in the respective tank. If the coolant level in the respective tank (12) rises above the threshold range, the respective modulating valve (46) is opened to allow removal of coolant, to maintain the coolant level within the threshold range in each coolant filter tank (12). The coolant filtering system (10) segregates different material contaminants carried by common machine tool coolant for recycling.
REFERENCES:
patent: 4421645 (1983-12-01), Creps et al.
patent: 4618431 (1986-10-01), Hindman et al.
patent: 4655940 (1987-04-01), Harms
patent: 5030346 (1991-07-01), McEwen
patent: 5221467 (1993-06-01), Suzuki et al.
patent: 5230793 (1993-07-01), Lenhart et al.
Publication by Katsumi Kawabe et al. entitled "Instrumentations and Automation Systems for Waterworks", published in Toshiba Review vol. 133, May-Jun. 1981.
Bailey Michael R.
McEwen Scott M.
Drodge Joseph W.
Henry Filters, Inc.
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