Abstract: A control system for a heavy-duty vehicle such as a dump-type straight truck includes a portable radio frequency transmitter and a radio frequency receiver. The radio frequency receiver is operatively connected to a vehicle device or assembly which performs a function such as operation of the vehicle dump bed or raising and lowering of the vehicle axle/suspension system, so that the function can be controlled from the cab of the vehicle by the radio frequency transmitter, and whereby the function occurs substantially instantaneously due to the use of radio frequency and eliminates the need for a custom hard-wired control system.

Abstract: An apparatus and method for sizing and separating particles of generally low-density materials includes a stand, a frame movably suspended on the stand by a plurality of suspension assemblies, and an elongated screen box mounted on the frame. The screen box receives material to be processed at an input end and includes openings at an output end for discharging processed material. The frame and screen box are disposed at an incline relative to a horizontal surface on which the stand rests, so that material travels downwardly in the screen box toward the output openings. A vibrator motor is mounted on the frame input end. The arrangement of the motor and suspensions results in imposition of a combination generally circular planar motion to the frame and screen box at the input end and a generally oblong linear reciprocating motion at the central portion and the output end of the apparatus.