Liquid purification or separation – Structural installation – Closed circulating system
Patent
1975-03-12
1976-06-01
Granger, Theodore A.
Liquid purification or separation
Structural installation
Closed circulating system
4291, 134111, 229DIG14, 229 53, B01D 2304, B65D 2904
Patent
active
039607283
ABSTRACT:
A disposable filter unit for use with a parts washer or the like. The filter consists of a body in the general form of a bag, made from a softenable but substantially solvent-impermeable thermoplastic material having a neck portion attached to a mounting collar. The mounting collar is a stiff but resilient element suitable for being positioned and retained within the drain opening of the parts washer, being constantly held in place by a cup or screen. The filter body has large by-pass openings in the neck, smaller openings in the upper body portion and still smaller openings in the lowermost portion. The filter acts by trapping sharp-edged or jagged particles such as slivers and filings, both on the interior surface of the bag and within the openings. Entrapment of the filtered material effectively creates a finer mesh filter, and the graduated opening sizes provide a combination filtration and settling action.
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patent: 383327 (1888-05-01), Staw
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patent: 2663428 (1953-12-01), Hoagland
patent: 2688914 (1954-09-01), Eckler
patent: 3091339 (1963-05-01), Marra et al.
patent: 3430767 (1969-03-01), Lawalin et al.
Fitzgibbon James T.
Granger Theodore A.
Safety-Kleen Corporation
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