Abstract: A thrust bearing system for use in a conical rock crusher is located between a rotational eccentric mechanism and a stationary frame of the rock crusher. The thrust bearing system comprises a stationary bearing and rotatable bearing, each bearing including an annular, generally flat plate centered about a bearing axis. Each flat plate has a generally planar wearing surface and an opposite surface. The wearing surface of the rotatable bearing is configured for concentric, sliding engagement with the wearing surface of the stationary bearing. The wearing surface of the rotatable bearing also includes a plurality of lubrication grooves. Each groove has a length extending in a radial direction of the annular plate from an inner wall of the annular plate across the wearing surface to an outer wall of the annular plate. Each groove has a generally triangular cross section throughout the entire length of the groove.

Abstract: This is concerned with a crusher clearing system using a plurality of hydraulic jacks disposed with relation to the adjustment ring and main frame of the crusher such that the jacks, as a unit, apply a generally vertical thrust directly between the upper main frame flange and the adjustment ring so that uncrushable material may be removed from the crushing cavity in a stalled or jammed crusher.

Abstract: This is concerned with a crusher clearing system using a plurality of hydraulic jacks disposed with relation to the adjustment ring and main frame of the crusher such that the jacks, as a unit, apply a generally vertical thrust directly between the upper main frame flange and the adjustment ring so that uncrushable material may be removed from the crushing cavity in a stalled or jammed crusher. The jacks are arranged in pairs and the jacks are selectively energized so that the adjustment ring will tilt relative the main frame flange.

Abstract: This is concerned with a crusher clearing system using a plurality of hydraulic jacks disposed with relation to the adjustment ring and main frame of the crusher such that the jacks, as a unit, apply a generally vertical thrust directly between the upper main frame flange and the adjustment ring so that uncrushable material may be removed from the crushing cavity in a stalled or jammed crusher.

Abstract: This is concerned with a so-called gyratory crusher bowl clamping system in which a screw-threaded bowl is rotated for adjustment and a so-called rocker arm pressure-off clamping system is provided which avoids dirt, dust and sealing problems. The crusher includes a frame which is greatly simplified, but has increased strength and rigidity as well as a support for the crushing head that greatly simplifies manufacturing and machining problems.