Patent ID: 6668712
Filing Date: 2003-12-30
Classification: B02C,E01C

Abstract:
A portable crusher comprising:a hopper having a material inlet and material outlet spaced from said inlet; a pair of jaws within said hopper positioned between said inlet and outlet, said jaws being movable relative to one another, whereby material moving from said inlet to said outlet passes between said jaws and is crushed by said jaws, said pair of jaws comprising a first, stationary jaw, and a second, moveable jaw having a first end pivotally coupled to said hopper at said inlet and a second end near said outlet coupled to an actuator via a toggle; said actuator comprising a cylinder and a piston slidable within said cylinder to affect said relative movement between said jaws: said toggle comprising a first link pivotally couple to said piston and said second jaw and a second link pivotally coupled to said piston and said hopper, wherein movement of said piston through a predetermined distance past an aligned position, at which said first link is aligned with said second link, yields two opening oscillations and one crushing oscillation of said moveable jaw for each stroke of said actuator, which yields two different sizes of the jaw outlet for crushed material.