Patent ID: 6957786

Claim:
A jaw crusher unit for use in crushing stone and other crushable material and comprising: a fixed jaw and a moveable jaw which define a crushing zone therebetween, a drive mechanism coupled with the moveable jaw and operative to rock the moveable jaw to and fro in order to crush material in the crushing zone, a link mechanism connected to a lower end of the moveable jaw and serving to set any required space between the lower end of the moveable jaw and the fixed jaw and thereby control the discharge of crushed material from the lower end of the crushing zone, and a removable wear plate mounted on a mounting face of at least one of said jaws by a wedge arrangement coupled with a power-operated linear actuator which is operative in one direction to pull the wear plate into engagement with the mounting face in order to mount the wear plate on the jaw and which is operative in an opposite direction in order to move the wear plate away from the mounting face and thereby allow the wear plate to be lifted out of the crusher unit when it is required to be replaced.