Back to results
US 2003/0146316 A1Published application
Comminution machine or crusher
OwnerRobert Anthony Crabbeinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerRobert Anthony Crabbeinventor
Estimating the term…
A comminution machine is provided for comminuting crushable materials such as rock, masonry and reinforced concrete, or shreddable materials such as motor vehicle tires. The machine comprises a hopper having an open top (11) tapering to a narrower discharge opening (12). The hopper has a curved anvil wall (6) and a curved and reciprocally pivotable crushing jaw (7). Movement of the crushing jaw (7) is controlled by a two-way hydraulic ram (9). The shape of the crushing jaw (7) is generally that of a spiral away from its pivotal axis in a direction from the bottom to the top of the hopper, with the result that reciprocation of the crushing jaw (7) imparts a mixture of compressive and shear forces on comminutable material in the hopper, the sheer forces increasing in proportion nearer to the discharge opening of the hopper.
A comminution machine comprising a hopper for receiving comminutable material, having an open top tapering to narrower discharge opening at the bottom, the hopper having a curved anvil wall facing a working face of a curved crushing jaw which is reciprocally movable about a pivotal axis that is near to the bottom of the hopper a d displaced rearwardly from the working face of the crushing jaw, wherein the crushing jaw curves generally in a spiral away from its pivotal axis in a direction from the bottom to the top of the hopper, and a two-way hydraulic ram acts on the crushing jaw for imparting reciprocal pivotal movement thereto so as to impose a mixture of compressive and shear forces on comminutable material in the hopper, the shear forces increasing in proportion nearer to the discharge opening of the hopper
A comminution machine according to either preceding claim, wherein the spiral form of the crushing jaw approaches a tangent to a radius centred on the pivotal axis at the discharge opening of the hopper.
A comminution machine according to any preceding claim, where the anvil wall is formed front a number of plates in stepped formation, over which the comminutable material must pass in its passage from the open top of the hopper to the discharge opt.
A comminution machine according to any preceding claim, where the distance between the pivotal axis of the curved crushing law and the anvil wall can be varied so as to vary the width of the discharge opening and thereby vary the average size of the fragments of comminuted material passing through the discharge opening.
A comminution machine according to any preceding claim, wherein the hopper is mounted as a front bucket of an excavator, so that comminutable material can be scooped into the open top of the hopper by the excavator bucket action, and delivered from the discharge opening as comminuted fragments delivered to a discharge location.
Dependencies are inferred from the claim text.