Patent ID: 8029665

Claim:
A screening device for wastewater, and the like, comprising: a perforate screening member through which wastewater in an associated wastewater channel flows from a bottom side thereof to a top side thereof, such that solids in the wastewater are captured by said screening member and form screenings on said screening member; an overfall wall positioned in said wastewater channel; a clearing member being shiftable relative to said screening member for clearing the screenings therefrom, and being positioned upstream of said overfall wall; a waterwheel positioned in said wastewater channel at a location downstream of said overfall wall, and being operably connected with said clearing member for mechanically shifting the same to remove the screenings from said screening member without using external power; and a pump operably connected with said screen clearing member for shifting the same to remove the screenings from the screening member, and operably connected with and driven by said waterwheel.