| 摘要 |
An hydraulic control device which can be used particularly for the control of a winch driven by an hydraulic motor, having two slide valve distributors, whose slide valves are subjected to the action of a spring to position them in a rest position. The slide valves are each capable of occupying two positions and are coupled to a single operating lever. A first distributor situated in a duct ensures the permanent opening of the duct in the rest position while the second distributor situated in series with the first, is of the reversing device type and places the first distributor in selective communicating with two other ducts connected respectively to a source of fluid under pressure and to a discharge reservoir. The rest position of the second distributor corresponds to the connection of the first with the reservoir. The slide valve of the first distributor is coupled on the one hand to a single acting ram supplied by the fluid conveyed between the first and the second distributor.
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