FOUR-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 four stationary fixed hydro-cylinders through which flexible rods pass; the rods are made out of the cable of closed structure. The flexible rod is designed to be alternately caught with pistons with controlled collets which facilitate loaded cable traveling. Synchronous travel of the said pistons occurs under effect of working fluid pressure supplied into working and auxiliary hydro-cylinders by means of hydro-distributors from an oil station. Working cavities of the main hydro-cylinders are correspondingly connected by means of pipelines with working and auxiliary cavities of a multiplier. Return cavities of the main hydro-cylinders are connected via pipelines with working cavities of adjacent hydro-cylinders. Return cavities of adjacent hydro-cylinders are connected between them and with a drain pipeline by means of a common pipeline with the oil station via the same hydro-distributor.

EFFECT: facilitates expanded process functions of device due to synchronous operation of cylinders.

1 dwg