Overload preventing device in crushers

Abstract From the Canadian patent

A crusher has a crusher cone and a crushing liner defining a crusher nip therebetween. A substantially vertical pressure cylinder has an upper and a lower space and the crusher cone, has a central supporting member extending into the upper space and supported for axial movement in the upper space on pressure fluid contained therein. Pressure fluid is controllably supplied and discharged from the lower space in dependence on the pressure exerted on the crusher cone by material to be crushed in the nip whereby the elevation of the crusher cone and the width of the nip are adjusted. A damper includes a damping cylinder and a conduit having a constricted passage and providing a continuous …