Patent ID: 9149811
Filing Date: 2015-10-06
Classification: B02C,B62D

Abstract:
1. A mobile rock crushing device for coupling to a truck for on highway transportation and transportable at a job site without the truck, comprising: a frame having a truck connector (kingpin) proximate a front portion of a frame to connect to the truck, the frame having a center of gravity; a conveyor connected to the frame to transport crushed materials, the conveyor extending beyond the truck connector (kingpin); a wheel assembly at least partially permanently connected to the frame proximate a back end, the wheel assembly including three axles connected to the frame through a plurality of suspensions, each axle having at least a pair of wheels, the wheels configured to contact a ground surface and being capable of transporting the mobile rock crushing device on the highway, the wheels configured to contact the ground surface at a wheel point of contact relative to the frame, the wheel assembly having a lateral end, the wheel assembly being located longitudinally behind the center of gravity of the frame; and a track connected to an intermediate portion of the frame at the job site such that the track contacts the ground surface at a track point of contact relative to the frame, the wheel point of contact being vertically closer to the frame than the track point of contact such that when the track contacts the ground, the wheels do not contact the ground, the track extending laterally beyond the a lateral end of the wheel assembly, the track connected to the frame such that at least a portion of the track is centered relative to the center of gravity of the frame, the track capable of moving the mobile rock crushing device while the conveyor is connected to the frame.