Abstract: An impacting body is mounted rotatably to a spindle provided on a principal plane of a rotor. The impacting body is mounted so that a predetermined fitting gap is provided between the impacting body and the spindle and a part of periphery of the impacting body can be positioned beyond a periphery of the rotor. The rotor is rotated at a high speed to allow the impacting body to impact on an object to be processed at least at its critical impact velocity. This enables only the top layer of the object to be processed at the part on which the impacting body has impacted to be broken instantaneously. When the rotor is moved while being rotated, the object to be processed can be cut. According to this cutting device, an object formed of a single member such as glass, ceramics, resin, metal, or the like, or a composite member thereof can be cut continuously with one kind of cutting tool.

Abstract: A mill for shredding objects by rotating hammers. Each hammer has two heads and is mounted to rotate on its central axis. Thus both heads are operative for shredding without stopping the machine.

Abstract: A cage mill includes a housing, a disc rotatably supported within the housing, a plurality of support shafts each fixed at one end to the disc so as to form a cage, a band fixed to the other end of each of the support shafts, a plurality of ceramic pins each having a through-hole in which one of the support shafts is placed so as to support one of the ceramic pins, and a plurality of nuts each engaging with a male screw portion of each end of the support shafts for releasably fixing the support shafts and the ceramic pins to the disc and the band. The support shafts and loosely placed in the ceramic pins, respectively, so that the latter can be turned around the former when the nuts are released.

Abstract: A ring hammer (10) is disclosed for use in material reduction apparatus such as a coal granulator, the ring hammer including a substantially circular body (12) having a plurality of circumferentially spaced radially projecting teeth (22) joined by a corresponding plurality of connecting segments (30). The teeth and connecting segments taper inwardly (26, 32) from their outermost surfaces (24, 34) toward the axial ends (28) of the hammer, the taper of the connecting segments being significantly larger than that of the teeth. This geometry facilitates manufacture of the hammer by forging and insures the presence of tooth-like projections on the hammer even when the outer surfaces of the teeth have worn down to the level of the connecting segments.

Abstract: A ring hammer for a reducing machine includes an annular body and tooth projected radially from the annular body and arranged in two rows, with the teeth of the one row being spaced axially from the teeth of the other row and further being offset circumferentially from the teeth of the other row. A reinforcing ring extends around the annular body in the space between the two rows of teeth and is formed integral with the annular body and the teeth of the two rows. The reinforcing ring tapers downwardly to the side faces of the annular body in the spaces between successive teeth of each row so that the teeth possess greater depth at their outside faces than at their inside faces. The reinforcing ring strengthens the ring hammer and renders the teeth less susceptible to breakage.

Abstract: The breaker plate of a coal crusher has holes therein so that coal small enough to pass through those holes does so without being acted upon by the rotor. This increases the capacity of the crusher, reduces fines, and conserves power. The plate is oriented such that windage generated by the rotor urges the smaller pieces of coal through the holes.