Abstract: A crusher is provided having improved wear resistance and crushing capacity. Particularly, the crusher provides an improved mechanism for adjusting the closed side setting by acting on an adjustable jaw, rather than the moveable jaw. The crusher includes a moveable jaw, an adjustable jaw, and a frame that supports the adjustable jaw and the moveable jaw such that the adjustable jaw and the moveable jaw define a crushing chamber having an upper opening for receiving a material to be crushed and a lower opening for expelling crushed material from the chamber after crushing. The crusher also includes a drive mechanism coupled to the moveable jaw for directing reciprocating motion of the moveable jaw and an adjustment mechanism coupled to the adjustable jaw for altering an angle of the adjustable jaw and, thereby, altering a closed side setting of the crushing chamber.

Abstract: A crusher is provided having improved wear resistance and crushing capacity. Particularly, the crusher provides an improved mechanism for adjusting the closed side setting by acting on an adjustable jaw, rather than the moveable jaw. The crusher includes a moveable jaw, an adjustable jaw, and a frame that supports the adjustable jaw and the moveable jaw such that the adjustable jaw and the moveable jaw define a crushing chamber having an upper opening for receiving a material to be crushed and a lower opening for expelling crushed material from the chamber after crushing. The crusher also includes a drive mechanism coupled to the moveable jaw for directing reciprocating motion of the moveable jaw and an adjustment mechanism coupled to the adjustable jaw for altering an angle of the adjustable jaw and, thereby, altering a closed side setting of the crushing chamber.

Abstract: A jaw-type rock crusher has a stationary jaw, a cantilevered swing jaw driven by a toggle drive system, and a top feed opening above the crushing chamber formed between the two jaws. Two lateral hinge supports having an elevated horizontal hinge axis which lies in a plane generally bisecting the crushing chamber hingedly engage lateral support arms forming the upper hinge section of the swing jaw. In accordance with the invention, the lateral hinge supports and the swing jaw's upper support arms straddle the frame of the crusher and its top feed opening to allow the top feed opening to extend behind the swing jaw's hinge axis thereby permitting larger rock to be fed into the crusher and permitting easier access into the crusher for the purpose of dislodging or breaking up over-sized rock. A shock-absorbing back wall positioned behind the hinge axis near the top of the crusher prevents the impact forces of rock fed into the feed opening at high velocities from being fully absorbed by the swing jaw's bearings.