Patent ID: 6811685
Filing Date: 2004-11-02
Classification: B01D,Y10S

Abstract:
A strainer device for removing debris particles from a flow stream in a flow pipe, comprising:(a) a housing into which the flow stream passes from the flow pipe for filtration and from which it passes after filtration; (b) a screen element; (c) a source roller attached to a first end of the screen element; and (d) a take-up roller attached to a second end of the screen element; in which the screen element extends across the interior of the housing in the path of the flow stream to define (i) a flow region upstream of the screen and a flow region downstream of the screen, (ii) an active portion of the screen element which is in the path of the flow stream and through which the flow stream may pass, and (iii) a non-active portion, and means for rotating the source roller and the take up roller to move the screen element from the source roller to the take-up roller so as to periodically replace the active portion of the screen element with a previously non-active portion of the screen element.