Rotary jaw crusher
AssigneeThe United States of America as represented by the Secretary of the Interior
InventorCarl R. Peterson
Life of this patent
Estimating the term…
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.
Claims6
A generally horizontally fed rotary jaw crusher assembly comprising:
- horizontal feed means for feeding the material to be crushed in a generally horizontal direction to the cursher;
- a large outer stationary jaw having a concave curved material engaging surface;
- a smaller inner rotatable jaw having an outer continuous material engaging curved surface and a hollow center portion adapted to receive a center driven shaft about which it can rotate, said inner and outer jaw being located with respect to each other such that at least along a portion of their two material engaging surfaces there is formed a passageway of progressively narrow width into which all of the material to be curshed is fed from the horizontal feed means in a generally horizontal direction;
- the center driven shaft adapted for use with the inner jaw being rotatable about its own center axis and smaller in diameter than said inner jaw's hollow center portion and mounted therein;
- eccentric means connected to and moveable with said driven shaft for causing the eccentric motion of said inner jaw's material engaging surface about the center of said driven shaft;
- and
- means located between the eccentric means and inner jaw material engaging surface for allowing the inner jaw's material engaging surface to freely rotate about the center shaft whereby material fed between the inner jaw and the outer jaw is subjected to a peristaltic pumping crushing action.
Dependencies are inferred from the claim text.