Abstract: A mobile trash compactor and pulverizer with a light weight compaction roller. The compaction roller has support discs in which a main shaft is supported and between which is mounted an over shaft concentric with the main shaft. An inner drum is mounted on the over shaft and flanking outer drums are mounted on the main shaft with drum support rings. A disc wheel mounted on a disc support ring caps the ends of the main shaft. A reversible drive is attached to the main shaft and another independent reversible drive is attached to the over shaft. The support discs, drum support rings and disc support rings have a rim, spokes and a hub with apertures between the spokes that facilitate maintenance.

Abstract: An arrangement for the compressing of refuse and similar materials by means of a number of roller-shaped compressing bodies acting in a container or similar receptacle and moving along the container so as to compress the material. The arrangement permits the effective compressing of the intended material without the need for a major labor input, etc.

Abstract: A driving control device in a crawler type tractor comprises a lever capable of being operated in the forward or reverse (backward) direction and capable of being operated in the right or left direction when the lever is operated so as to move to the end of the forward or reverse direction, and a speed-stage command device capable of generating and transmitting commands for speed stages for the forward and the reverse directions. When a first sensor detects the lever operation in the forward or reverse direction; the transmission speed stages can be selected in accordance with the first sensor output and the output of the speedstage command device, and the operation amount of the lever in the right or left direction is detected by a second sensor so that steering clutches of the tractor can be controlled in accordance with the output of the second sensor.