Abstract: Shearing means of a brushwood cutter has a rotor with a plurality of sickle-shaped cutters, and a plurality of stationary, triangular tooth-like edge protrusions of a plate on which the rotor rotates. The curve defined by the cutting edge of each of the sickle-shaped cutters is such that the tangent at any tangent point of the curve is disposed at between 50.degree.-80.degree., and preferably between about 60.degree.-80.degree., with respect of a radial line passing through such tangent point and through the center of rotation of the rotor to secure a smooth operation of the rotor and to render the device capable of cutting relatively large pieces of brushwood.

Abstract: Apparatus for clearing brushwood or the like including a novel arrangement of shearing means and a brushwood material positioning means selectively adjustable to properly position the brushwood material for cutting and feeding to a chopping unit. The machine comprises a main frame mounting a pair of shearing units, each comprising stationary and rotary cutting elements rotatable in opposite directions toward one another to feed the cut brushwood material to a chopping unit for reducing it to chip size located generally centrally and rearwardly of the shearing units. The stationary and rotary cutting elements are of a predetermined relative configuration to accommodate cutting of relatively large sized brushwood material. The machine also includes a pushing fork assembly comprising a linkage system and a pivotally mounted actuator whereby the height and longitudinal position of the pushing fork may be selectively varied in relation to the shearing units.