Flow-divider valve

A flow-divider valve comprising:

• a casing provided with an inlet port connected to a fluid pressure source, a first outlet port connected to a first hydraulic open circuit for a first hydraulically powered device and a second outlet port connected to a second hydraulic open circuit for a second hydraulically powered device;
• a first pressure chamber in open communication with said inlet port and a second pressure chamber in open communication with said first outlet port, a valve body displaceably disposed between said first and second pressure chambers, said first pressure chamber being selectively connected with said second outlet port in response to displacements of said valve body to regulate fluid quantity to be supplied into said second hydraulic open circuit and the communication degree between said second pressure chamber and said first outlet port being regulated in response to the displacements of said valve body to control fluid quantity to be supplied into said first hydraulic open circuit;
• variable orifice means in said casing between said first and second pressure chambers to regulate fluid flow from said inlet port toward said second pressure chamber;
• and
• means for controlling the throttling degree of said orifice means in response to pressure independently exerted within said first and second hydraulic open circuits;
• whereby the displacements of said valve body are compensated in accordance with the throttling degree of said variable orifice means, said means for controlling the throttling degree of said orifice means including third and fourth pressure chambers which are independently in open communication with the first and second open hydraulic circuits respectively.