Patent ID: 9021725
Filing Date: 2015-05-05
Classification: E02F

Abstract:
1. A mining shovel including a base and a motor driving a pulling mechanism, the mining shovel comprising: a boom extending from the base, the boom having a first end attached to the base, and a second end remote from the base; a boom handle pivotally mounted on the boom; a dipper attached to an end of the boom handle; a hoist rope extending over the second end of the boom and supporting the end of the boom handle, the hoist rope configured to be driven by the motor; and a sheave rotatably attached to the second end of the boom, the sheave including a hub rotatably coupled to the boom and defining an axis, two parallel plates defining a space therebetween, each plate including an outer perimeter and an inner edge connected to the hub, a unitary rim member having an inner surface secured to the outer perimeter of both plates and defining multiple circumferentially extending grooves for receiving and guiding the hoist rope over the second end of the boom, and a plurality of reinforcing tubular members extending between the plates, each tubular member extending through both plates and defining a hollow space extending through both plates.