Abstract: A system for maintaining a downward force on a central shaft of a cone crusher having a stationary frame is provided, wherein the central shaft is mounted to rotate with respect to the stationary frame. The system may include a disc fixed to the frame and having a substantially centrally-disposed opening. A pressure plate may be mounted to and biased toward the central shaft and positioned below the disc. The pressure plate may have a surface that faces the disc and extends downwardly. The bias of the pressure plate toward the central shaft may bias the pressure plate against the disc during at least some crushing operations. The disc may exert a downward force on the pressure plate and on the central shaft to which the pressure plate is mounted during the at least some operations.

Abstract: A system for maintaining a downward force on a central shaft of a cone crusher having a stationary frame, including a disc fixedly mounted to the frame, the disc having a centrally-disposed aperture with a first diameter. A plate is mounted to an end cap, the plate having a second diameter that is greater than the first diameter. The plate is disposed distally of the disc and the end cap is disposed proximally of the disc. A housing is fixed to the central shaft and biased away from the end cap wherein a downward bias is imparted to the central shaft.

Abstract: A mantle is provided that is disposed over a cone head of a cone crusher, including an outer surface designed to cooperate with a crusher liner to crush rocks that enter a crushing zone between the outer surface of the mantle and the crusher liner. Also provided is a mantle nut and washer assembly for mounting the mantle to the cone head. The mantle includes a flange extending around an inner surface of the mantle between the inner surface of the mantle and the mantle nut and washer assembly to absorb heat generated when performing cutting operations to remove and replace the mantle.

Abstract: Embodiments disclosed herein provide a cone crusher having a bowl support and a stationary frame to which the bowl support may be mounted, the frame including an outwardly-facing threaded portion. A wedge structure may be disposed between the bowl support and the threaded portion of the frame, the wedge structure including an inwardly-facing threaded portion, the threads of which complement the outwardly facing threaded portion of the frame. Means may be provided for exerting an upward force on the wedge structure to move the wedge structure from an original position to an operational position during crushing operations and means may be provided for exerting a downward force on the wedge structure to return the wedge ring to the original position following crushing operations.

Abstract: A rock crusher is provided that has a crusher cavity defined between a first part and a second part. A plurality of hydraulic cylinders are mounted between the first and second part, the hydraulic cylinders including a relief system. The relief system is included for reducing oil pressure within the hydraulic cylinders in the event uncrushables enter the crusher cavity, the relief system including a relief valve that is designed to open when hydraulic pressure in hydraulic cylinder reaches a predetermined level. This reduces the pressure in the hydraulic cylinder as oil pressure is dumped from the hydraulic cylinder via various oil passages.

Abstract: A rock crusher is provided that has a crusher cavity defined between a first part and a second part. The crusher includes a plurality of hydraulic cylinders mounted between the first and second parts, each of the hydraulic cylinders formed of cylinder barrels and including a base and a plurality of oil passages longitudinally extending and evenly spaced around and within the cylinder barrels, each of the oil passages including a first port accessing the interior of the hydraulic cylinder at a point remote from the cylinder base, and a second port disposed adjacent the cylinder base. A hydraulic pump may also be included, providing oil pressure to the hydraulic cylinders.