Patent ID: 6874716

Claim:
A beater bar actable upon on one side for impactor rotors and insertable form-fittedly into circumferential slots of the rotors, the beater bar comprising a beater bar member having rearwards, opposite to a direction of rotation of the rotors, and facing the rotors, a bend with an elongate cross-section for engagement into a longitudinally running undercut of the circumferential slots, bearing surfaces by which the beater bar member is heldable counter to a centrifugal force of the rotating rotors against a bearing surface of the rotors, a supporting surface by which the beater bar member is engageable with an undercut in the circumferential slot, and a beating surface, and a piece selected from the group consisting of a supporting piece and a bearing piece which holds the beater bar member in engagement with the undercut in the circumferential slot, said bend being of arcuate design, and a center of rotation of a smaller radius of an arc of said bearing surfaces being arranged at a considerable distance from a center of rotation of a larger radius of an arc of said supporting surface, in direction of a beating circle of the beating bar, and said two centers of rotation running in a line extending approximately parallel to a beating surface, said bearing surfaces being at an obtuse angle to one another in a prolongation of the smaller arc.