TWO-CABLE WINCH WITH HYDRAULIC STEP DRIVE Russian patent published in 2009 - IPC B66D1/08 

FIELD: mining.

SUBSTANCE: invention refers to mining, particularly to mine lifting devices with hydraulic drive. The device consists of two stationary fixed hydro-cylinders, through which flexible rods pass; these rods are made out of a cable of closed structure. The flexible rod is designed to be alternately caught by pistons with controlled collets which facilitate loaded cable traveling. Traveling of the said pistons occurs under effect of working fluid supplied into hydro-cylinders by means of distributors from an oil station. A reverse cavity of the first hydro-cylinder of the two-cable winch is connected with a working cavity of the second hydro-cylinder via a pipeline. The working cavity of the second and the reverse cavity of the first hydro-cylinders are alternately fed with working liquid from the oil station directly via the reverse hydro-distributor.

EFFECT: extends process functions of device.

2 dwg