Liquid purification or separation – Flow – fluid pressure or material level – responsive – Filter cleaning
Patent
1976-09-29
1977-08-16
Adee, John
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Filter cleaning
210108, 210355, B01D 2938
Patent
active
040425045
ABSTRACT:
A self-cleanable filter, comprises: a housing having a fluid inlet, a fluid outlet, and a dirt purging opening; a filter body within the housing and having a surface facing the inlet side of the housing; and a cleaning body within the housing and movable from a home position along the cylindrical surface of the filter body for cleaning same. The cleaning body comprises a first section defining an internal chamber having an inlet opening facing the surface of the filter body to be cleaned and movable along said surface, and a second section closing the dirt purging opening when the cleaning body is in its home position. The second section has an outlet opening communicating with the internal chamber and located within the housing in the home position of the cleaning body but movable through the housing purging opening to a position externally of the housing upon the movement of the cleaning body for cleaning the filter. A number of embodiments are described wherein the cleaning body is mounted for linear movement, rotary movement, and both linear and rotary movements, with respect to the filter body. In most of the described embodiments, the filter includes a sensor for automatically sensing the pressure difference between the inlet and outlet and for initiating a cleaning operation.
REFERENCES:
patent: 2422735 (1947-06-01), Guardia
patent: 3493113 (1970-02-01), Rosaen
patent: 3574509 (1971-04-01), Zentis
patent: 3717252 (1973-02-01), Picard
patent: 3959140 (1976-05-01), Legdas
patent: 3994810 (1976-11-01), Schaeffer
Adee John
Barish Benjamin J.
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