Device for supplying fluid under pressure to two reversible load elements

Claim 1

A device for supplying pressurized fluid to two load elements such as hydraulic motors, comprising two first conduits each connected to one load element and to a source of pressurized fluid, and two second conduits each connected to one load element and to an exhaust reservoir, a first flow divider being disposed in the first conduits, characterized in that the load elements are reversible, the first and second conduits are respectively placed in communication with the fluid source and the exhaust reservoir or vice versa, and a second flow divider is disposed in the second conduits, a third conduit connected to each first conduit and providing a by-pass for the first flow divider associated with the first conduits, a fourth conduit connected to each second conduit and providing a by-pass for the second flow divider associated with the second conduits, said by-passes being provided with position-controlling elements and so coupled as to maintain the two corresponding conduits in the same position, the control elements of the third and fourth conduits being respectively actuated by the pressure of the fluid in the second conduits downstream of the second flow divider with respect to the load elements and by the pressure of the fluid in the first conduits downstream of the first flow divider with respect to the load elements, so that the first and second conduits are respectively placed in communication with the fluid source, the free communication of the first and second conduits with the exhaust reservoir being assured by by-passing the first and second flow dividers, respectively.

Claim 2

A device for supplying pressurized fluid to two load elements such as hydraulic motors, comprising two first conduits each connected to one load element and to a source of pressurized fluid, and two second conduits each connected to one load element and to an exhaust reservoir, a first flow divider being disposed in the first conduits, characterized in that the load elements are reversible, the first and second conduits are respectively placed in communication with the fluid source and the exhaust reservoir or vice versa, and a second flow divider is disposed in the second conduits, a third conduit connected to each first conduit and providing a by-pass for the first flow divider associated with the first conduits, a fourth conduit connected to each second conduit and providing a by-pass for the second flow divider associated with the second conduits, said by-passes being provided with position-controlling elements and so coupled as to maintain the two corresponding conduits in the same position, the control elements of the third and fourth conduits being respectively actuated by the pressure of the fluid in the second conduits downstream of the second flow divider with respect to the load elements and by the pressure of the fluid in the first conduits downstream of the first flow divider with respect to the load elements, so that the first and second conduits are respectively placed in communication with the fluid source, the free communication of the first and second conduits with the exhaust reservoir being assured by by-passing the first and second flow dividers, respectively.

Claim 3

A device for supplying pressurized fluid to two load elements such as hydraulic motors, comprising two reversible load elements, a source of pressurized fluid, an exhaust enclosure, two first conduits, two second conduits, each of said first and second conduits being connected, on the one hand to one of the load elements, on the other hand, selectively, the first conduits to the source of fluid and to the exhaust enclosure and the second conduits to the exhaust enclosure and to the fluid source, respectively, a first flow divider interposed in the two first conduits, a second flow diviDer interposed in the two second conduits, four first connecting conduits which are connected on the one hand in shunt to the parts of the first conduits connected on either side of the first flow divider, to the first flow divider, on the other hand together at a first common point, two first non-return valves which are each disposed respectively in one of the connecting conduits which are connected to the parts of the first conduits connecting the two load elements to the first flow divider, these two first non-return valves allowing the passage of the fluid of said parts of the first conduits towards the first common point, four second connecting conduits which are connected, on the one hand, in shunt to the parts of the second conduits connected on either side of the second flow divider to this second flow divider on the other hand, together at a second common point, and, two second non-return valves which are each disposed respectively in one of the connecting conduits which are connected to the parts of the two conduits connecting the two load elements to the second flow divider, these two second non-return valves allowing the passage of the fluid of said parts of said second conduits towards said second common point.

Claim 4

A device for supplying pressurized fluid to two load elements such as hydraulic motors, comprising two reversible load elements, a source of pressurized fluid, an exhaust enclosure, two first conduits, two second conduits, each of said first and second conduits being connected, on the one hand to one of the load elements, on the other hand, selectively, the first conduits to the source of fluid and to the exhaust enclosure and the second conduits to the exhaust enclosure and to the fluid source, respectively, a first flow divider interposed in the two first conduits, a second flow diviDer interposed in the two second conduits, four first connecting conduits which are connected on the one hand in shunt to the parts of the first conduits connected on either side of the first flow divider, to the first flow divider, on the other hand together at a first common point, two first non-return valves which are each disposed respectively in one of the connecting conduits which are connected to the parts of the first conduits connecting the two load elements to the first flow divider, these two first non-return valves allowing the passage of the fluid of said parts of the first conduits towards the first common point, four second connecting conduits which are connected, on the one hand, in shunt to the parts of the second conduits connected on either side of the second flow divider to this second flow divider on the other hand, together at a second common point, and, two second non-return valves which are each disposed respectively in one of the connecting conduits which are connected to the parts of the two conduits connecting the two load elements to the second flow divider, these two second non-return valves allowing the passage of the fluid of said parts of said second conduits towards said second common point.

Claim 8

A device for supplying pressurized hydraulic fluid to two load elements such as hydraulic motors, comprising two first conduits each connected to a different load element and to a first single conduit and two second conduits each connected to a different load element and to a second single conduit, a first flow divider having restrictive flow paths capable of producing a selected appointment of flow from said first single conduit to said first two conduits, said first flow divider being switchable into and out of fluid communication with said first single conduit and said first two conduits, a second flow divider having restrictive flow paths capable of producing a selected apportionment of flow from said second single conduit to said second two conduits, said second flow divider being switchable into and out of fluid communication with said second single conduit and said second two conduits, a distributor arranged for connecting said first and second single conduits to a source of pressure and to a reservoir respectively and vice versa, first control means responsive to application of pressurized fluid to said first single conduit to prevent switching of said second flow divider into communication with said second single conduit and with said second two conduits and second control means responsive to application of pressized fluid to said second single conduit to prevent switching of said first flow divider into communication witH said first single conduit and with said first two conduits.

Claim 9

A device for supplying pressurized hydraulic fluid to two load elements such as hydraulic motors, comprising two first conduits each connected to a different load element and to a first single conduit and two second conduits each connected to a different load element and to a second single conduit, a first flow divider having restrictive flow paths capable of producing a selected appointment of flow from said first single conduit to said first two conduits, said first flow divider being switchable into and out of fluid communication with said first single conduit and said first two conduits, a second flow divider having restrictive flow paths capable of producing a selected apportionment of flow from said second single conduit to said second two conduits, said second flow divider being switchable into and out of fluid communication with said second single conduit and said second two conduits, a distributor arranged for connecting said first and second single conduits to a source of pressure and to a reservoir respectively and vice versa, first control means responsive to application of pressurized fluid to said first single conduit to prevent switching of said second flow divider into communication with said second single conduit and with said second two conduits and second control means responsive to application of pressized fluid to said second single conduit to prevent switching of said first flow divider into communication witH said first single conduit and with said first two conduits.