Astec Industries, Inc.

William R Gray

J Don Brock

Herbert E Jakob

Robert G Stafford

A method of manufacturing a large stationary, aggregate processing screening tower by fabricating weldment modules and preassembling them with aggregate processing equipment internal within the weldment modules, transporting the preassembled weldment modules to a field work site where the tower is to be erected on a foundation, aligning the modules and stacking the modules in layers and then bolting adjacent modules together. A large stationary, aggregate processing screening tower has weldment modules preassembled with aggregate processing equipment internal within the modules. The preassembled modules are stacked up on one another and secured together and can receive aggregate product at the top module and the product is processed by screening and sizing as it moves downwardly by gravity through the modules and their processing equipment for final clarification and collection of the product.

Large, stationary, modular aggregate processing plant and method of manufacturing and installing same

A rock crusher such as a cone or jaw crusher incorporates hardened tapered inserts in the manganese or other wear liner of at least one of its crushing elements. The inserts extend outwardly from the crushing surface of the crushing element towards the facing crushing surface so as, in use, to act as pick axes that shatter rock primarily by impact rather than pulverizing the rock by compression. The inserts are fixed in a heat treated manganese wear liner either by bonding or by press-fitting. The inserts substantially improve the life of the wear liner and, unexpectedly, 1) produce product of a highly uniform gradation in the desired ranges, 2) consistently produce product with a very high cubicity, 3) dramatically reduce the crusher's power requirements, and 4) significantly increase the crusher's capacity.

Rock crusher having crushing-enhancing inserts, method for its

A portable mineral processing machine has a chassis, a mineral processing device mounted on the chassis, and a control cab support mechanism operative to vertically raise the control cab from a lowered in pit transport position in which it is supported on the chassis to a raised operative position in which it is supported on the ground and elevated to a designated height above the chassis. The control cab support mechanism preferably comprises a scissor lift mechanism including upper and lower scissor mechanisms which are independently operated by respective upper and lower double-acting hydraulic cylinders or the like. The upper scissor mechanism is operative to raise an upper platform with respect to an intermediate support platform, and the lower scissor mechanism is operative to first lower a lower platform with respect to the intermediate support platform, and then to raise the intermediate support platform, upper scissor mechanism, and upper platform with respect to the lower platform.

Growing community of inventors

New Berlin, WI, United States of America

William R Gray