Abstract: A resettable relief system for a crusher is provided. A first linkage member is connected to a material crushing portion of the crusher is connected to a second linkage member in a hinged manner. A hydraulic device exerts forces to the linkage members sufficient to maintain them in an unrelieved position, until forces exerted on the linkage members from the material crushing portion exceed a predetermined threshold, and then permit said first and second linkage members to move into a relieved position.

Abstract: The present invention provides an impact crushing apparatus that includes a housing, a chamber defined within the housing, a rotor assembly for receiving material and throwing the material radially outward, a lid for closing the chamber, and a plurality of anvils positioned around the rotor assembly and configured to break apart the material. The lid includes a plurality of openings positioned about its perimeter and the plurality of anvils are slidably receivable in the plurality of openings, wherein the anvils include a top portion and a bottom portion having an impact surface configured to break apart the material, the top portion being supported by the top surface of the lid and the bottom portion positioned within the chamber such that the material collides with the impact surface of the plurality of anvils and breaks apart.

Abstract: An apparatus for crushing mine ore or hard rock primarily for initial reduction for transport of the material for further processing which is characterized by an extremely low vertical profile relative to its size and capacity. The crushing jaws which form the crushing chamber are uniquely arranged in an inclined relationship with the lower jaw mounted for eccentric movement relative to the upper jaw which is stationary to provide efficient crushing action and efficient movement of the crushed material through the chamber while also permitting the associated inlet feed apparatus to be disposed at a low attitude. Means are included to provide for varying the size of the discharge opening and for varying the action of the moveable crushing jaw to permit greater versatility in the proper processing of a given material.