Abstract: A screening apparatus is removably connected to a prime mover having an excavating bucket or loading shovel. The screening apparatus includes a material feed conveyor that feeds material to a screening device. A mounting mechanism and associated adjustment mechanism are used to detachably and movably mount the screening apparatus to support structure on the prime mover, with the conveyor being located adjacent the bucket or loading shovel for receiving unscreened material into the screening apparatus from the bucket or loading shovel during use.

Abstract: A screening apparatus (6) is removably connected to front arms (7) of an excavator (1) by means of quick release couplings to enable the screening apparatus to be quickly attached and removed as required. Material is fed to the screening apparatus (6) by means of a conveyor (2) attached to the side of the back-hoe excavator (1). The excavating shovel (5) is used to load material into hopper (9) at the lower end of the conveyor (2) to allow the material to be conveyed upwardly. The excavator (1) can move on wheels (3). The screened material may fall directly to the ground or onto a stock piling conveyor located adjacent the screening apparatus (6). The screening apparatus may also be mounted on a tracked excavating machine.

Abstract: A screening apparatus comprising a rectangular screening frame and a multiplicity of parallel wires which are tensioned across the screening frame has a plurality of support bars with guide slots in order to support additionally each wire. The support bars are axially rotatably and interchangeably secured to the screening frame thus allowing to use the same screening frame for different string assemblies with different distances between the wires.If guide slots for different wire spacings are provided at different sides of a support bar, the same frame and the same support bars can be used for different string assemblies.The arrangement according to the invention allows an easy and rapid change of string assemblies on the same screening frame.