Patent ID: 7581562

Claim:
A hydraulic distributor comprising: a distributor body ( 2 ), an intake port (P) for pressurized hydraulic fluid which port is intended to be connected to a source of pressurized hydraulic fluid, a return port (T) for returning fluid to a reservoir, at least two working ports (A, B) each of which is intended to be connected to at least one hydraulic receiver to supply and return the fluid, a slide ( 8 ) housed in a bore ( 4 ) formed in the body ( 2 ) and which is intended to be moved longitudinally to selectively transmit the pressurized hydraulic fluid to the working ports (A, B) from the intake port (P), a passage ( 12 ) formed in the body ( 2 ) for selectively connecting the intake port (P) to the working ports (A, B), regulating means ( 15 ) which are situated in said passage ( 12 ) to be inserted between the intake port (P) and the working ports (A, B) and which are associated with a load detection line channel ( 16 ), a supply bridge ( 20 ) which comprises two branches ( 21 , 22 ) each opening into the bore ( 4 ) of the slide ( 8 ) on each side of the intake port (P) in order to be connected selectively to said fluid ports respectively, and two main nonreturn valves ( 25 , 26 ) which are borne entirely by the slide ( 8 ), these respectively being inserted between the supply bridge ( 20 ) and the working ports (A, B) and each comprising a valve head ( 31 , 32 ) able to move in a longitudinal channel ( 33 , 34 ) itself connected to at least one transverse supply slit ( 35 , 36 ) which opens into the bore ( 4 ), characterized in that the distributor ( 1 ) further comprises two secondary nonreturn valves ( 40 , 41 ) which are respectively mounted in the longitudinal channels ( 33 , 34 ) upstream of the heads ( 31 , 32 ) of the main nonreturn valves ( 25 , 26 ), and in that the secondary valves are connected to torque slits ( 50 , 51 ) which open into the bore ( 4 ) in which the slide ( 8 ) moves, each of these slits being connected, at least in one position of the slide ( 8 ), to one branch of the supply bridge ( 20 ).