Mobile crushing plant

Claim 1

A crushing implement which includes in combination: an understructure having foot portions rigidly connected to it with bearing surfaces adapted to immediately rest upon the ground; a. a plurality of wheels associated with said understructure and operable selectively to support said understructure for moving said crushing implement to any desired place; b. the axle supports of said wheels are connected to said understructure by means which transmit forces in horizontal directions between said axle supports and said understructure but which permit movements of said axle supports relative to said understructure in nearly vertical direction; c. double acting hydraulic power devices interposed between said axle supports and said understructure and provided with control means in such a manner that by means of said hydraulic power devices on the one hand when said control means are adjusted into one position said understructure will be lowered as far as said foot portions rest upon the ground while said wheels are lifted off the ground and on the other hand when said control means are adjusted into another position said axle supports will be lowered as far as said wheels rest upon the ground while said understructure is lifted off the ground; d. a source of pressure fluid is connected to said hydraulic power devices by fluid conveying conduit means, said wheels being subdivided into three groups and the power devices which pertain to the wheels of each group being interconnected through equalizing conduits each of three separate conduits connecting said source of fluid to the equalizing conduit of one of said groups of wheels thus realizing a three point support of said understructure upon said wheels when the latter are resting upon the ground; e. equalizing means associated with said hydraulic power devices for obtaining uniform stroke conditions of said hydraulic power devices; f. driving means operatively connected to at least some of said wheels; g. steering means operatively connected to at least some of said wheels for selectively steering the same.