Hydraulic Control System Having Relief Flow Capture
First Claim
1. A hydraulic system comprising:
- a pump to supply pressurized fluid to a circuit;
a supply passageway coupled between the pump and the circuit;
a relief flow passageway coupled between the supply passageway and a fluid reservoir;
a relief flow capture circuit coupled to the relief flow passageway, the relief flow capture circuit including;
a first valve configured to move from a closed position to an open position when a first pressure is detected;
a second valve in fluid communication with the first valve, the second valve configured to move from a closed position town open position when a second pressure is detected wherein the second pressure is lower than the first pressure; and
an accumulator located between the first and second valves and in fluid communication with both the first and second valves, the accumulator configured to store fluid flowing through the first valve when the first pressure valve is in an open position, the accumulator further configured to outflow fluid through the second valve when the second valve is in an open position.
1 Assignment
0 Petitions
Accused Products
Abstract
A hydraulic circuit may be provided. The circuit may include: a pump to supply pressurized fluid to a circuit; a supply passageway coupled between the pump and the circuit; a relief flow passageway coupled between the supply passageway and a fluid reservoir; a relief flow capture circuit coupled to the relief flow passageway, the relief flow capture circuit including: a first valve configured to move from a closed position to an open position when a first pressure is detected; a second valve in fluid communication with the first valve, the second valve configured to move from a closed position to an open position when a second pressure is detected wherein the second pressure is lower than the first pressure; and an accumulator located between the first and second valves and in fluid communication with both the first and second valves, the accumulator configured to store fluid flowing through the first valve when the first pressure valve is in an open position, the accumulator further configured to outflow fluid through the second valve when the second valve is in an open position.
13 Citations
20 Claims
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1. A hydraulic system comprising:
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a pump to supply pressurized fluid to a circuit; a supply passageway coupled between the pump and the circuit; a relief flow passageway coupled between the supply passageway and a fluid reservoir; a relief flow capture circuit coupled to the relief flow passageway, the relief flow capture circuit including; a first valve configured to move from a closed position to an open position when a first pressure is detected; a second valve in fluid communication with the first valve, the second valve configured to move from a closed position town open position when a second pressure is detected wherein the second pressure is lower than the first pressure; and an accumulator located between the first and second valves and in fluid communication with both the first and second valves, the accumulator configured to store fluid flowing through the first valve when the first pressure valve is in an open position, the accumulator further configured to outflow fluid through the second valve when the second valve is in an open position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of capturing relief flow comprising:
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moving a first valve of a relief flow capture circuit from a closed position to an open position when a first pressure is detected to charge an accumulator, the relief flow capture circuit coupled to a relief flow passageway that is coupled between a supply passageway and a fluid reservoir, the supply passageway coupled to a pump configured to supply pressurized fluid to a circuit; and moving a second valve of the relief flow capture circuit from a closed position to an open position when a second pressure is detected to discharge the accumulator, wherein the second pressure is lower than the first pressure, the second valve in series with the first valve, - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A hydraulic circuit comprising:
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means for supplying pressurized fluid to a circuit; a supply passageway coupled between the means for supplying pressurized fluid and the circuit; a relief flow passageway coupled between the supply passageway and a fluid reservoir; a relief flow capture circuit coupled to the relief flow passageway, the relief flow capture circuit including; a first means for selectively allowing and disallowing fluid flow configured to move from a closed position to an open position at a first pressure; a second means for selectively allowing and disallowing fluid flow in fluid communication with the first means for selectively allowing and disallowing fluid flow, the second means for selectively allowing and disallowing fluid flow configured to move from a closed position to an open position at a second pressure wherein the second pressure is lower than the first pressure; and an accumulator located between the first and second means for selectively allowing and disallowing fluid flow and in fluid communication with both the first and second means for selectively allowing and disallowing fluid flow, the accumulator configured to store fluid flowing through the first means for selectively allowing and disallowing fluid flow when the first means for selectively allowing and disallowing fluid flow is in an open position and the second means for selectively allowing and disallowing fluid flow is in a closed position, the accumulator further configured to outflow fluid through the second pressure valve when the second means for selectively allowing and disallowing fluid flow is in an open position.
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Specification