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 a flexible rod passes; this rod is 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 pistons occurs under effect of working fluid supplied into hydro-cylinders by means of distributors from an oil station. Synchronous movement of pistons in automatic reverse mode is achieved due to control signals transmitted from corresponding hydro-cylinders to the distributor via logic elements "AND". An idle branch of a raised rod is directed via a mouthpiece to a rotating basket of a conic shape installed at the point of idle branch outlet of the said cable, while the axis of basket rotation together with the axis of the cable in the hydro-cylinder constitutes an angle from 40 to 50 degrees.

EFFECT: facilitates simplification of design and expanding process functions of device.

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