Patent ID: 6869524
Filing Date: 2005-03-22
Classification: B01D,E02B

Abstract:
1. A screen system for removing debris from a flow channel, the system comprising: a screen frame; a plurality of bars, defining a bar screenfield; a rake having a plurality of tines that fit between the bars of the bar screenfield, the rake being movable along the bars to clear the bar screenfield of debris; a scraper mounted horizontally at a top of the screen system for removing the debris from the rakes, the scraper having a blade that engages the rake as the rake move towards a top of the screen frame, the blade comprising a single piece rigid member, the scraper being pivotally mounted to the screen frame for movement between a rest position while not engaging the rake and engaged position when engaging the rake; and the scraper including a plurality of horizontally spaced apart scraper arms that rigidly support the blade, at least one of the arms having a curved inner edge under which the rake passes, the curved inner edge having a curvature to prevent contact of the curved inner edge with the tines of the rake.