(under subclass 130) Apparatus in which the responsive means is a separating element or filter medium which provides a bypass by flexing or compression thereof or by movement in its entirety.
SEE OR SEARCH THIS CLASS, SUBCLASS:
356, for fluid operated means to flex a filter means during operation.
398+, for movable elements within a casing, the movement of which may open a bypass.
738, and 748, for processes including pulsation or oscillation essential to the separation or purification.
