Liquid purification or separation – Flow – fluid pressure or material level – responsive – Filter cleaning
Patent
1975-01-14
1976-05-18
Adee, John
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Filter cleaning
55215, 55272, 55294, 55459R, 13762512, B01D 4604
Patent
active
039576396
ABSTRACT:
A control mechanism for apparatus for cleaning of fluid filters by a jet of fluid directed toward a filter in a direction reversed to that of the flow of fluid to be filtered through the filter element. An elongated manifold extends across the downstream or clean fluid delivery side of the filter element, and has a plurality of aligned apertures extending longitudinally of the manifold and facing the adjacent side of the filter element. A plurality of valve elements are mounted in the manifold for movement toward and away from closing relationship with the apertures, and are yieldingly urged toward closing relationship with their respective apertures. A rotary cam shaft is journaled in the manifold and includes a plurality of cams each associated with a different valve element. A pawl and ratchet arrangement is operative to open each of the valves in succession responsive to movement of the manifold across the side of the filter element. The cam arrangement is such that only one valve element is open at any one given time during the filter cleaning operation.
REFERENCES:
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patent: 2584746 (1952-02-01), Sheldon
patent: 2796146 (1957-06-01), Hersey
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patent: 3360907 (1968-01-01), Clark, Jr.
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patent: 3395517 (1968-08-01), Lang et al.
patent: 3541764 (1970-11-01), Astrom
patent: 3616614 (1971-11-01), Eisenegger
patent: 3757497 (1973-09-01), Ray
Schoen Donald W.
Silvernail James M.
Adee John
Donaldson & Company, Inc.
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