Patent ID: 8021544

Claim:
A screening device for wastewater overflow weirs, and the like, comprising: a perforate screening member through which wastewater flows from a wastewater side thereof to a clean water side thereof, having a frame and a plurality of screening rods arranged in a laterally spaced apart, mutually parallel relationship, with opposite mounting ends thereof fixedly connected with said frame, such that solids in the wastewater are captured by said screening member on said wastewater side thereof; and wherein each of said screening rods has a screening area with a predetermined length extending generally longitudinally between said mounting ends through which the wastewater flows from a wastewater face thereof oriented toward the incoming unscreened wastewater and a clean water face disposed opposite and downstream of said wastewater face and oriented toward the outgoing screened wastewater between which is defined a rod thickness oriented generally parallel to the direction of wastewater flow through said screening rods; said screening area of each of said rods having opposite terminal portions with a first rod thickness and central portions located between said terminal portions and having a second rod thickness that is sufficiently greater than said first rod thickness of said terminal portions, whereby the resistance to the flow of wastewater through said screening area of said screening member from said wastewater side thereof to said clean water side thereof is substantially uniform along said length of said rods to achieve improved screening effectiveness and efficiency.