Patent attributes
A hammer assembly for attachment to a rotor of a rotary material crusher. The hammer assembly has an adaptor, having a base portion and a hammer mounting portion, with the base portion being attachable to the rotor at the periphery portion and a hammer, having at least one impact portion, for crushing material, and a mounting portion for engagement with the hammer mounting portion of the adaptor. The hammer mounting portion of the adaptor includes bearing surfaces facing a direction of impact when crushing material, and the mounting portion of the hammer includes bearing surfaces for mating with the bearing surfaces of the hammer mounting portion of the adaptor. The hammer assembly further includes a retainer rod, and at least one retainer pin. The hammer is attached to the adaptor and the retainer rod passes through apertures of the adaptor and apertures of each retainer pin in the direction of the longitudinal axes of the hammer and the adaptor. The size of the retainer rod, the size of the apertures of the adaptor and the size of the aperture of each retainer pin are selected such that the hammer is free to move to enable the bearing surfaces of the hammer to bear on the bearing surfaces of the adaptor and transfer impact forces when impact forces from crushing material are applied, with the retainer rod being free from any of the impact forces.
