Patent ID: 8992157
Filing Date: 2015-03-31
Classification: E02F

Abstract:
1. A crowd assembly for a power shovel that has a boom, the crowd assembly comprising: a saddle block adapted for pivotal connection to the boom; a tubular dipper handle supported by and slideable relative to the saddle block; a hydraulic actuator having a cylinder and a piston rod that is extendable from one end of the cylinder, one of the cylinder and the piston rod is fixed to the dipper handle and the other of the cylinder and the piston rod is stationary relative to the saddle block, wherein the cylinder and the piston rod are received within the dipper handle thereby enabling the dipper handle to slide longitudinally over the cylinder, and wherein the cylinder includes an annular groove on an exterior surface and adjacent the one end of the cylinder; a guide bushing affixed to the cylinder adjacent the one end and slideably contacting an interior surface of the dipper handle, wherein the guide bushing includes an inwardly projecting flange extending into the annular groove of the cylinder and abutting a wall of the annular groove to limit longitudinal movement of the guide bushing in a first direction relative to the cylinder; and an annular bushing retainer received within the annular groove of the cylinder and abutting the projecting flange of the guide bushing to limit longitudinal movement of the guide bushing in a second direction relative to the cylinder.