OIL DISTRIBUTION DEVICE WITH CHECK VALVE

The invention relates to a hydraulic transmission device for a vehicle, said device comprising a first pump (10) and a second pump (20), a first hydraulic apparatus (11) and a second hydraulic apparatus (21), a first supply circuit (12) connecting the first pump to the first apparatus, and a second supply circuit (22) connecting the second pump to the second apparatus and in which a check valve (30) is provided between the supply circuits, the check valve having a flow direction from the first to the second supply circuit, a first return circuit (13) connecting the first apparatus to said pumps, a second return circuit (23) connecting the second apparatus to the inlets of said pumps, so that the return circuits (13, 23) are in permanent fluid communication with each other through a junction (31).