A low speed low power shredder for biomass material a single drum or two spaced rotary drums supported in a housing having a cylindrical wall with a plurality of outward shear members spaced longitudinally and radially of the cylindrical wall so as to pass a cooperating element in a shearing action. The shear members form ends of a support plate extending diametrically through the wall so as to provide structural support. In the two drum system, a top grate member is mounted in the feed throat and a bottom grate member is provided underneath the plane of closest approach. Each of these grate members provide shearing actions with the shear members. Additionally, a composting machine is arranged to be fed by a shredder, and thus includes an input conveyor supported at a position coaxial with a rotary vessel of the composter and a tubular support member which defines one location at which the rotary vessel is supported in its rotation about its axis.

The present invention relates to a shear bar, in particular, for a wood chipper for producing wood chips, having at least one cutting edge formed from a hard material and one support surface leading to the cutting edge, wherein the cutting edge is formed from a plurality of hard material elements arranged side by side along the cutting edge on at least one basic body. A strength-optimized realization with a long service life and a simple assembly is achieved as a result of the hard material elements being fastened on the at least one basic body by means of an adhesive bond.

A cutter assembly is presented for mounting to one or more hammers of a rotor assembly of a grinding machine. The cutter assembly includes a base, a tip and a fastener securing the base and the tip to the hammer. The base includes a key having side walls extending upwardly from a surface of the base and spatially oriented as sides of a pyramid that is truncated before reaching their apex. The tip includes a keyway having side walls extending inwardly from a lower surface into a body of the tip and spatially oriented as sides of a pyramid. The keyway mates with the key of the base. The tip includes at least one, and preferably two, cutting edges disposed on opposing ends of the tip. In one embodiment, the tip is reversibly mountable to the base such that the cutting edges may be selectively used within grinding operations. In one embodiment, at least a portion of side walls of the truncated pyramid key and keyway are curved in a plane parallel to the surface of the base.

An apparatus for shredding meat with a hopper and a frame. The hopper has upper and lower rotor assemblies mounted to rotate horizontally within a shredding region. Each rotor assembly is composed of an arbor and fingers arranged in paraxial rows around the arbor. Four rows of pegs extend horizontally into the shredding region. A front row and a back row are each 0.75 inch above and below, respectively, the upper rotor assembly. A back row and a front row are each 0.75 inch above and below, respectively the lower rotor assembly. The hopper is suspended in the frame, which houses the drive mechanism that rotates the rotor assemblies in opposite directions. The upper rotor assembly pushes product dropped into the shredding region into the upper back row to shred the product. The lower rotor assembly pushes the shredded product into the lower front row to further shred the product.

The invention relates to a crusher for crushing solid material, the crusher comprising a frame; at least one crusher rotor arranged rotatably to the frame and having crusher blades secured to the circumference thereof; a yielding counterblade structure arranged for cooperation with the crusher blades of the rotor for concurrently crushing and cutting said material and for yielding when encountering non-crushable material and when overloaded; and a yielding and downwardly openable set of screens below the crusher rotor, whereby the counterblade structure is linked to the frame of the set of screens and made turnable towards it with respect for the pivoting shaft in a yield situation; and the set of screens is linked to the crusher frame on the opposite side of the crusher rotor with respect to the counterblade structure and its pivoting shaft and made downwardly collapsible about the pivoting shaft of the set of screens.

A bone grinder may have a grinding chamber, an intermediate zone, and a primary cutting element and a secondary cutting element. The intermediate zone may have a first wall and a second wall within the grinding chamber, and the intermediate zone may separate the primary cutting element from the secondary cutting element. The first wall and the second wall may slope inward such that a distance between the first wall and the second wall generally decreases from the primary cutting element to the secondary cutting element. The primary cutting element and the secondary cutting element may be positioned within the grinding chamber to sequentially perform primary cutting operations and secondary cutting operations on a bone. A drive mechanism may operatively engage the primary cutting element and the secondary cutting element.

The present disclosure relates to a cutter bar for chopping machines. The cutter bar includes a cutter bar body that defines an edge groove. The edge groove includes a groove bottom and a groove sidewall. The groove sidewall is formed by the material of the cutter bar body. A wear protection structure extends along a surface of the cutter bar body from the edge groove. The wear protection structure is built up on the surface of the cutter bar body as an additively manufactured metal powder application layer. At least one carbide strip is secured to the edge groove and forms the cutting edge. The carbide strip can be fastened to the edge groove by means of a bonding agent, such as solder or adhesive.

The invention relates to a comminutor for comminuting bulk material, and a trailer and method therefor. The comminutor includes a frame provided with an opening; a rotatable drum which is arranged on the frame and on which blades are provided; counter-blades which are connected to the frame and which operate with the blades for the purpose of comminuting material carried into the opening; a screen positioned on the underside of the drum; and an access door connected to the frame and provided with a tilting mechanism such that easy access to the screen is obtainable by opening the door.

A cutter bar has a cutter body with a substantially rectangular cross section formed by an upper face, two side faces and a lower face. The upper face together with at least one side face defines a cutting edge, which is formed by one or more hard metal profile strips fastened in a groove in the cutter body. The wall of the groove which adjoins the upper face of the cutter body encloses with the upper face of the cutter body an angle less than 90, preferably 89 to 15, particularly preferably 80 to 40. The wall of the groove which adjoins the lateral face of the cutter body encloses with the lateral face of the cutter body an angle less than 90, preferably 89 to 15, particularly preferably 80 to 40. The hard metal profile strip or hard metal profile strips is or are positively inserted in the groove.

The present invention relates to a counter-blade, in particular, for a wood chipper, for producing wood chips, comprising at least one cutting edge made of a hard material, and a support surface leading to the cutting edge. According to the present invention, the cutting edge is made up of a plurality of hard material elements that are arranged next to one another along the cutting edge on a main member. This results in a counter-blade having a long service life.