Abstract: Disc mowers having a drive casing to accommodate the drive means for disc-shaped rotary cutters with knives attached thereto tend to permit a layer of soil and plant matter to build up in the overlap region of the knives between adjacent stone guards. This tendency is prevented according to the invention by a scraper and deflection element disposed in the overlap region at the front face of the drive casing below the rotary knives and between the rotary cutter discs in the overlap region of the knives. The scraper and deflection element may be adapted to cooperate with mechanically, hydraulically or pneumatically powered cleaning elements to prevent and to remove solid build-up in the overlap region.

Abstract: A device for picking up plant material lying on the ground having several driven cylindrical rotors that are provided on their bottom portions with a conical collar. Replaceable elements are fastened to the collar and serve to probe the ground, pick up plant material lying on the ground, and transport it to one side and in the direction of travel of the apparatus. Transporting ribs on the collar improve the operation. The elements subject to wear are replaceable after a certain period of operation.

Abstract: Disc mowers having a drive casing to accommodate the drive means for disc-shaped rotary cutters with knives attached thereto tend to permit a layer of soil and plant matter to build up in the overlap region of the knives between adjacent stone guards. This tendency is prevented according to the invention by a scraper and deflection element disposed in the overlap region at the front face of the drive casing below the rotary knives and between the rotary cutter discs in the overlap region of the knives. The scraper and deflection element may be adapted to cooperate with mechanically, hydraulically or pneumatically powered cleaning elements to prevent and to remove solid build-up in the overlap region.