A biaxial shearing crusher includes: two rotating shafts (5) arranged in parallel; cutting discs (3) respectively sleeved on the two rotating shafts (5) in a perpendicular form and rotating with the rotating shafts (5), wherein the cutting discs (3) on one of the rotating shafts (5) radially extend into spaces formed by the adjacent cutting discs (3) on the opposing rotating shaft (5); a tank (2) having a top opening and a bottom opening, wherein the two rotating shafts (5) are arranged in the tank (2); plates (4) mounted on sidewalls (9) of the tank (2), wherein the plates (4) extends into spaces formed by the sidewalls (9) and the adjacent cutting discs (3); a holder (6), wherein the tank (2) is mounted on the holder (6); and motors (1) mounted on the holder (6), wherein the two motors (1) drive the two rotating shafts (5) to rotate oppositely for crushing.

An under-sink disposal unit includes a motor, a disposal chamber, and a disposal throat. The disposal throat extends from the disposal chamber to an opening in a top of the disposal unit and defines a passageway through which objects pass into the disposal chamber for grinding. The disposal unit further includes a coil assembly including an arrangement of coils. The arrangement of coils is used to detect the passing of a metallic object in the passageway through the disposal throat. Furthermore, the arrangement of coils includes at least one coil having a loop that is oriented with respect to an axis of the passageway through the disposal throat such that objects passing through the disposal throat into the disposal chamber pass by and proximate to, but do not pass through, such loop. Preferably DC injection braking is used to stop the motor upon detection of a metallic object.

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 shredder is disclosed. The shredder includes a housing having a throat for receiving at least one article to be shredded, and a shredder mechanism received in the housing and including an electrically powered motor and cutter elements. The shredder mechanism enables the at least one article to be shredded to be fed into the cutter elements. The motor is operable to drive the cutter elements so that the cutter elements shred the articles fed therein. The shredder also includes a detector that is configured to detect a thickness of the at least one article being received by the throat, and a controller that is operable to perform a predetermined operation responsive to the detector detecting that the thickness of the at least one article is at least equal to a predetermined maximum thickness.

An anti-jam assembly for an article destroying appliance includes a fixed core mount assembly including a first support member spaced apart from a second support member with at least one moveable cutter shaft rotatably mounted and disposed there between. A third elongate member extends in parallel relationship to the at least one cutter shaft. This third support member is moveable from a first position to at least a second position. The first and the at least second position correspond to a variable width of a feed path directing an article toward the at least one cutter. An arm is affixed to the elongate member and pivotal at a mounting surface when the elongate member moves toward the second position. A sensor activates when it detects movement of the arm. The arm and the sensor are removed from a proximity of the at least one cutter or the feed path.

An under-sink disposal unit includes a motor, a disposal chamber, and a disposal throat. The disposal throat extends from the disposal chamber to an opening in a top of the disposal unit and defines a passageway through which objects pass into the disposal chamber for grinding. The disposal unit further includes a coil assembly including an arrangement of coils. The arrangement of coils is used to detect the passing of a metallic object in the passageway through the disposal throat. Furthermore, the arrangement of coils includes at least one coil having a loop that is oriented with respect to an axis of the passageway through the disposal throat such that objects passing through the disposal throat into the disposal chamber pass by and proximate to, but do not pass through, such loop. Preferably DC injection braking is used to stop the motor upon detection of a metallic object.

A comminuting device for solids-conducting liquids includes a housing with an inlet opening, an outlet opening and a housing interior space which extends from the inlet opening to the outlet opening. A first comminuting shaft arranged for rotation about a first comminuting shaft axis, and a second comminuting shaft arranged for rotation about a second comminuting shaft axis each extend through the housing interior space. A first screen device is arranged in the housing interior space adjacently with respect to the first comminuting shaft with a first screen wall having a multiplicity of slots. A first evacuating device with a plurality of evacuating elements which can be moved along a movement path relative to the screen wall extends through the plurality of slots on at least one portion of the movement path.

A method for controlling the rotation speed of a first and a second shaft of an industrial shredder as described, for material to be sorted and/or disposed of, for example metal and non-metal scrap, that is intended to be shredded between blades of the shafts. The shredder is provided with pressure sensors, which detects the pressure on each shaft, and a control unit, which acts on the pumps that supply pairs of hydraulic motors connected to the shafts. When the pressure sensor detects that the pressure value of at least one shaft is greater than a pre-set threshold pressure value, the control unit reduces the initial flow rate value of at least one of the two pumps so as to reduce the rotation speed of the respective shaft and facilitate the shredding of the scrap material.

A shredder includes a shredder box having a first end wall, a second end wall, and opposite side walls extending between the first and second end walls. A lower discharge opening discharges shredded material from the shredder box. A shredder rotor is positioned within an interior of the shredder box, the shredder rotor being rotatable about a rotor axis and including a main rotor body and plurality of rotor teeth mounted to the main rotor body. A shredder comb is positioned adjacent to the shredder rotor and includes comb teeth that intermesh with the rotor teeth. An upper hopper is located above the shredder box for receiving material to be shredded. The upper hopper includes an upper hopper end wall formed with a concavity to facilitate feeding of material to be shredded into the shredder box and to the shredder rotor.

A method for controlling the rotation speed of a first and a second shaft of an industrial shredder as described, for material to be sorted and/or disposed of, for example metal and non-metal scrap, that is intended to be shredded between blades of the shafts. The shredder is provided with pressure sensors, which detects the pressure on each shaft, and a control unit, which acts on the pumps that supply pairs of hydraulic motors connected to the shafts. When the pressure sensor detects that the pressure value of at least one shaft is greater than a pre-set threshold pressure value, the control unit reduces the initial flow rate value of at least one of the two pumps so as to reduce the rotation speed of the respective shaft and facilitate the shredding of the scrap material.