Abstract: A mobile device for turning over or mixing accumulations of organic waste materials, such as compost at fixed dump sites, having a steerable chassis with working tracks enabling it to advance through the accumulations of material. The device has a mechanism for mixing the waste picked up while it drives through the waste, and after being thoroughly mixed, redepositing the waste behind the device. The device includes a clearing mechanism disposed on the front side of the chassis and in the area in front of each of the working tracks of the chassis, for clearing a track path as the chassis moves through the waste material. The clearing mechanism avoids the need for laying down separate tracks and comprises a mixing mechanism with a guide shield disposed in front of the intake in the mixing mechanism and clearing tools disposed on a guide surface with the mixing mechanism.

Abstract: A flow-through brush cutter is mounted on a tracked vechicle and includes a thin, flat blade having a replaceable V-shaped forward cutting edge and adapted for movement along a horizontal plane disposed beneath the surface of the earth. A pair of thin legs extend upwardly from spaced points on the blade and are connected to the track assemblies of the vehicle by a pair of forwardly extending arms. The horizontal positioning of the blade is controlled by a fluid-powered cylinder mounted on a subframe secured to the frame of the vehicle and a cable system actuated by the fluid-powered cylinder and connected to the arms. Lateral displacement of the blade is controlled by guide members extending on opposite sides of the arms and secured to the track assemblies of the vehicle and to the subframe. The guide members are secured to the subframe by means of pin and slot connections which accommodate relative movement between the frame and the track assemblies of the vehicle.