Hydraulic crushing machine

Claim 1

A crushing machine comprising a body including a crusher bed defined by a generally horizontal platform for supporting an article to be crushed, end frame means extending upwardly from the opposite ends of said bed, horizontal stringer means connecting the upper ends of said end frame means, and upright wall means at the periphery of said bed for restricting lateral flow of the crushed metal; a generally horizontal crusher ram disposed above said crusher bed for vertical parallel movement toward and away from said bed; a hydraulic power system for supporting and powering said crusher ram including two hydraulic subsystems operating in generally parallel vertical planes, and a motor driven hydraulic pump for supplying pressurized hydraulic fluid to said subsystems; each planar hydraulic subsystem including first and second hydraulic power cylinders each having one end pivotally attached to said crusher ram intermediate the ends thereof and extending respectively toward opposite ends of said ram; first and second scissors assemblies associated respectively with said first and second power cylinders, each scissors assembly having an upper and lower arm pivotally connected, at one end, to each other and to the other end of its associated power cylinder; the free end of each upper scissors arm being pivotally connected to a respective end frame adjacent to the upper end thereof, and the free end of each lower scissors arm being pivotally connected to the crusher ram adjacent to a respective end; the pivotal connections of said two lower scissors arms and said two power cylinders to said crusher ram defining at least three spaced bearing points of the hydraulic subsystem transmitting force to said crusher ram; and said two hydraulic subsystems defining at least six spaced bearing points for the transmission of force to said planar crusher ram.