Abstract: An adjustable shelf unit for use in a storage rack and having at least two shelf panels supported on laterally spaced forwardly extending support members. Each panel is slidable over the panel behind it and each panel but the front panel has a indentation across its forward edge the depth of which is equal to the thickness of a transversely extending lip on the rear of the panel in front of it. The side flanges of the panels have tabs which engage one another when the panels are extended to limit the forward travel of the panels. Also disclosed is a cable which is looped around sheaves fixed to the support members. The cable is fixed to each side of the front panel so as to maintain proper alignment of the panels.

Abstract: A grain cleaner having a plurality of cleaning sections radiating outwardly from a grain inlet. Each cleaning section has upper and lower downwardly sloped screens over which grain flows by gravity to sift out fine foreign material. Upper and lower foreign material chambers underlie respective screens, and external bypass ducts bypass foreign material from each upper chamber to an associated lower chamber of each cleaning section. Each lower foreign material receiving chamber communicates with a centrally located foreign material discharge outlet at the bottom of the cleaner.

Abstract: A grain cleaning apparatus having an upstanding housing with a grain inlet, at least one layer of screens disposed below the inlet and a foreign material receiving chamber disposed below the screen, with separate outlets for foreign material and cleaned grain and integral means for bypassing a selected, infinitely variable, between limits, proportion of incoming grain flow around the screens to the grain outlet.