Abstract: A grinder for grinding relatively loose materials includes a reducing unit and a screen arrangement. The arcuate screen defines a plurality of tracks of apertures that extend in a cutting direction of the cutters. In some cases, only one respective cutter passes over each track and each cutter passes over only the respective one of the tracks. The width of a cutter may be greater than a width of the apertures of a track. The apertures of the screen arrangement may form chevron patterns. The screens may be clamped to a frame by coupling members extending through notches in the screen.

Abstract: A grinder for grinding relatively loose materials includes a reducing unit and a screen arrangement. The arcuate screen defines a plurality of tracks of apertures that extend in a cutting direction of the cutters. In some cases, only one respective cutter passes over each track and each cutter passes over only the respective one of the tracks. The width of a cutter may be greater than a width of the apertures of a track. The apertures of the screen arrangement may form chevron patterns. The screens may be clamped to a frame by coupling members extending through notches in the screen.

Abstract: A tub grinder includes a rotatable tub positioned above a floor; a grinder that has cutters defining a circular reducing boundary when the grinder is rotated in a reducing direction; and a deflection structure positioned near the floor above the grinder. The deflection structure includes first and second deflecting portions. The second deflection structure is oriented closer to horizontal than the first deflection structure. At least part of the second deflecting portion is located below a top, dead center of the reducing boundary of the grinder. The deflecting structure limits the trajectory of material ejected from the grinder to a departure angle of about 25 degrees.