Blow bar for impactor rotors

Abstract From the Canadian patent

A beater bar for impact rotors of impact mills is disclosed. The bar has a double-ended, symmetrical oblong cross-section that permits rotation of the bar through 180° when one of the longitudinal edges is worn down. The bar has a pair of opposite lateral surfaces shaped to include respective lateral projections for mounting the bar in the rotor. The projections are offset in opposite directions from the longitudinal centrelines of the lateral surfaces so as to provide overlapping planar abutment surfaces. In preferred embodiments, the projections are ribs. The basic cross-sectional shape of the bar may be a rectangle, a parallelogram or a double trapezoid tapering towards both edges.