Patent ID: 6957741

Claim:
A screening arrangement comprising: a screen support frame comprising a plurality of screen support frame sub-assemblies spaced from and parallel to one another and spaced apart from one other by a plurality of spacer bars, each sub-assembly comprising an elongate screen support member connected to a tubular element, said tubular element defining a threaded inner surface, wherein a threaded portion of a securing device is releasably connected to said threaded inner surface of said tubular element, said securing device further comprising a locating protrusion and a securing protrusion, wherein said securing protrusion comprises an annular ridge that stands proud axially of said threaded portion and at least partly around said locating protrusion; and a plurality of screening panels secured on said screen support frame, said screening panels comprising a peripheral frame having an upper surface, a lower surface, and an outer peripheral surface interconnecting said upper and lower surfaces, said peripheral frame defining an opening across which a plurality of mutually spaced ribs extend to defined a screening surface, wherein a locating recess and a securing recess are provided in said lower surface of said peripheral frame, said securing recess extending at least partly around and being concentric with said locating recess, wherein the locating recesses of adjacent panels defined a socket into which said locating protrusion is received, and further wherein the securing recesses of adjacent panels defined a socket into which said securing protrusion is received.