Patent ID: 7222807

Claim:
A bucket for crushing and screening stone and similar materials, comprising: a scoop-shaped body defining an inlet opening for the stone to be crushed and an outlet opening for the crushed stone, between which a direction of flow of the stone is defined; a mechanism for crushing the stone, the crushing mechanism having a first jaw and a second jaw housed in the scoop-shaped body and movable relative to one another; and an element including at least one eccentric for moving the first jaw relative to the second jaw, the element imparting to the first jaw a combined rotational and translational movement relative to the second jaw, in which a first component of the movement is away from and towards the second jaw and a second component of the movement is substantially parallel to the direction of flow, the combined movement creating a chewing motion, the at least one eccentric rotating through 180° to define a first position, in which the inlet opening has a maximum cross-section, and a second position, in which the inlet opening has a minimum cross-section.