Abstract: A centrifugal impact crusher has an enclosed table to ensure that substantially all the material deposited on the table is impacted against the anvils that surround the table. The table includes spaced-apart upper and lower plates that have radially oriented impellers sandwiched between them to direct material being thrown off of the table by centrifugal force to exit the table at the proper angle to achieve maximum fracture upon striking the anvils. The impellers have projecting tabs which fit into receptacles in the upper and lower plates and the plates are squeezed together to hold the tabs in the receptacles and lock the plates and impellers together in a rigid table assembly. The upper plate has a central opening through which material is deposited onto the table. A funnel directs material fed into the crusher through an infeed plenum and into the central opening in the upper plate to ensure that all of the material reaches the table.

Abstract: A plurality of generally wedge-shaped anvils, for use in a centrifugal impact rock crushing machine, line the inner wall of a containment housing. A bracket supports the anvils in the vertical direction; the inner periphery of the housing prevents the radially outward movement of the anvils and reaction forces from two adjacent anvils prevents the radially inward movement of the intervening anvil. The significant advantages of this configuration are the absence of connective means--thus eliminating a common failure mode, and the spreading of the impact forces against the anvils over a large surface area defined by the radially inward and side surfaces at the anvils.

Abstract: A centrifugal impact crusher has an enclosed table to ensure that substantially all the material deposited on the table is impacted against the anvils that surround the table. The table includes spaced-apart upper and lower plates that have radially oriented impellers sandwiched between them to direct material being thrown off of the table by centrifugal force to exit the table at the proper angle to achieve maximum fracture upon striking the anvils. The impellers have projecting tabs which fit into receptacles in the upper and lower plates and the plates are squeezed together to hold the tabs in the receptacles and lock the plates and impellers together in a rigid table assembly. The upper plate has a central opening through which material is deposited onto the table. A funnel directs material fed into the crusher through an infeed plenum and into the central opening in the upper plate to ensure that all of the material reaches the table.

Abstract: An apparatus for mounting impeller blocks to the turntable of a centrifugal impact crusher is provided. Each block defines a bore that extends between its forward and back faces, with the bore including an enlarged cavity region in communication with the forward face of the block. The head portion of an elongate bolt is seated within the enlarged cavity region, with a threaded portion of the bolt projecting from the back face of the block for insertion through an opening formed in an upright mount which is joined to the turntable. A fastener engages the threaded portion to releasably hold the block against the upright mount. The head portion of the bolt includes a wedge section that is radially asymmetrical about the center axis of the bolt for preventing rotation of the bolt within the bore during retightening of the fastener.

Abstract: Lifter for remotely removing the lid from a rock crusher is comprised of cylindrical support and lifting arms integrally joined normally to one another, and a tubular sleeve bearing which is attached generally vertically to the outer wall of the crusher shell a spaced distance therefrom, and which is configured for slideably and rotatably journaling the lifting arm. The support arm is attached to the lid thereby causing the lid to be lifted and rotated away from the crusher shell to expose the operative elements of the crusher upon respective lifting and rotation of the lifting arm. A hydraulically actuated piston cylinder mounted to the crusher frame below the lower end of the sleeve bearing, in a manner for insertion of its ram therein, is interconnected to the lifting arm through a thrust bearing for raising and lowering of the lifting arm and allowing its rotation in the sleeve bearing.