Abstract: The invention provides an apparatus for crushing material such as rock and includes a support structure having an inlet and an outlet. A powered rotor shaft rotates with respect to the support structure about a shaft axis, and a rotor mounted eccentrically on shaft describes orbital motion about the shaft axis. The rotor has a rotor wall which moves cyclically and laterally with respect to the axis during the orbital motion. At least one stator is mounted in the support structure to provide a stator wall spaced oppositely from the rotor wall to define therewith opposing walls of a crushing chamber located between the inlet and outlet. Feed direction of material passing between the inlet and outlet is generally perpendicular to the shaft axis, and when the rotor describes the orbital motion, spacing between opposing walls of the chamber varies cyclically. The stator is mounted yieldably so as to move away from the rotor when a pre-determined threshold force is exceeded so as to reduce possible damage.

Abstract: A dry washer for separating small high density particles such as gold from a mixture of high and low density material. A rotatable impeller in a cylindrical chamber draws in air and mixed particles, such as sand, and fractures the larger particles. The mixture of air and particles passes to a helical conduit having a perforated partition spaced from the outer wall so that high density particles pass through the wall under centrifugal forces. The particles are passed from the helical conduit to an inclined upper trough including an air permeable floor and riffles or the like to retain the high density particles. Air flow from the helical conduit is directed to a lower trough below the trough. A damper at the end of the lower trough causes air to pass through the air permeable floor and blow away fine low density particles. Dust and air from the trough assembly is passed to an elongated cover to collect the fine, low density, particles.

Abstract: This invention relates to an improvement in a single-roll crusher having a housing, a roll body freely rotatably supported on an eccentrically rotatable drive shaft in said housing, at least one laterally mounted crushing beam pendularly suspended in the upper part of said housing and resting in the lower region thereof at approximately the height of the roll body axis, by means of a pressure bar, against a prestressed set of springs solidly integrated in the crusher housing in order to absorb the crushing force, the prestressing force also being adjustable when the set of springs is integrated and the gap adjustment at the exit of the crushing space is achieved by changing the spacer thickness between the pressure bar and a spring retainer, the improvement comprising bayonet lock means holding the prestressed set of springs in the crusher housing, the prongs and mating prongs of said bayonet lock means mutually engaging and releasing each other in assembly and disassembly, and key means pressing the support

Abstract: A self-feeding and self-emptying food grinder is provided of a walled-hopper type with food receiving and bottom rectangular discharge openings. To this standard structure which may be mounted on a driving shaft, an improvement is provided that includes a foraminated outwardly directed convex grate enclosing and over the discharge opening and a driven cutter and move assembly transporting food from the hopper is provided with the assembly including a split drum smaller than and rotatably mounted off center in the discharge opening substantially along the parting line between the opening and grate, the drum being disposed to contact the grate on rotation at only one portion thereof.

Abstract: A portable hard rock crusher unit especially useful for low clearance underground mines. Material to be crushed is horizontally fed to the rotary crusher jaws. A curved convergent material flow-path is employed between two crusher jaws. The outer member of the crusher is a substantially stationary outer curved concave jaw and its inner jaw member is a cylindrical element mounted to give eccentric motion on a shaft. The inner member may freely rotate on its eccentric or it may also be rotatably driven. Material fed between the inner and outer jaw members of the crusher encounters a progressively narrower opening as it is crushed and moved by the peristaltic pumping action caused by the eccentric motion of the movable inner crusher element acting against the outer stationary jaw.