Patent US3864910A successfully refreshed from Google Patents.
US3864910A
Expired / Lapsed
US
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Device for supplying fluid under pressure to two reversible load elements
Assignee: Poclain SA
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Filing: 1973-09-10
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Granted: 1975-02-11
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Expires: 1993-09-10
Abstract
Abstract This application discloses a device for supplying pressurized fluid to two load elements such as hydraulic motors, comprises 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.
Inventors
- 👤 Gerard H Mechin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:42
CPC Classifications
F; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/44; F16H61/456; F16H61/4035; F16H61/4148
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
258 words
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
Independent Claim
258 words
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
Independent Claim
309 words
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
Independent Claim
309 words
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 5
Dependent Claim
76 words
A supply device as claimed in claim 2, characterized in that each of the first conduits is connected to a third conduit, which constitutes a by-pass of the first flow divider for said corresponding first conduits, in that each of the second conduits is connected to a fourth conduit, which constitutes a by-pass of the second flow divider for said second corresponding conduits, and in that the by-passes thus constituted are provided with position selecting means.
Claim 6
Dependent Claim
58 words
A supply device as claimed in claim 3, characterized in that said selecting members are constituted as a two-way distributor, which is interposed concomitantly in the by-passes of the first and second flow dividers, whilst, in its first position, this distributor ensures the continuity of the said by-passes and, in its second position, said distributor obturates, said by-passes.
Claim 7
Dependent Claim
78 words
A supply device as claimed in claim 2, characterized in that it comprises a variable flow pump connected by two main conduits to the first and second conduits respectively and in that, as a function of the position of the member adjusting the flow of said pump, one of said main conduits constitutes the source of pressurized fluid, or the exhaust enclosure, the other of said conduits constitutes complementarily the exhaust enclosure or the source of pressurized fluid.
Claim 8
Independent Claim
240 words
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
Independent Claim
240 words
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 10
Dependent Claim
40 words
A device according to claim 6 wherein said device further includes a second distributor operable subject to the operation of said first and second control means to switch said first and second flow dividers into communication with their respective conduits.
Claim 11
Dependent Claim
45 words
A device according to claim 6 wherein said first and second flow divider means include hydraulic valves and wherein said control means comprise pressure operated pilot systems connected to operate said valves in response to changes in pressure in said first and second single conduits.
Claim 12
Dependent Claim
69 words
A device according to claim 8 wherein said device includes further pressure operated pilot systems connected to operate said valves, a second distributor and means associated with said second distributor for supplying different fluid pressures to said further pressure operated pilot systems, said pilot systems and said means associated with said second distributor being of a size to provide less valve operating force than said pressure operated pilot systems.
Claim 13
Dependent Claim
39 words
A device according to claim 6 wherein said first and second control means comprise bypass lines bypassing said flow dividers and check valves in said bypass lines permitting free fluid flow in a direction away from said load elements.
Claim 14
Dependent Claim
24 words
A device according to claim 10 wherein said first and second single conduits are connected respectively to opposite terminals of a reversible hydraulic pump.
Claim 15
Dependent Claim
46 words
A device according to claim 11 wherein said first and second single conduits are further connected, via associated check valves, to a reservoir, said check valves allowing free fluid flow in a direction away from said reservoir and toward said hydraulic pump and said load elements.
Claim 16
Dependent Claim
60 words
A device according to claim 12 wherein said device includes means for maintaining a continuous circulating flow of hydraulic fluid past a junction at a given pressure, a fluid operated, pressure responsive pilot system for switching said first and second flow divider means and a second distributor switchable to connect said junction and said reservoir alternately to said pilot system.
References Cited (Backward Citations)
US2365095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |