Loading patent…
AssigneeArtemis Intelligent Power Limited
InventorsUwe STEIN, Jens EILERS, Jack LAVENDER, Stephen LAIRD
Estimating the term…
A valve unit for regulating the flow of working fluid between a working chamber of a fluid working machine and both a first working fluid line and second working fluid line, the valve unit comprising: a first valve comprising a first valve member and one or more cooperating first valve seats, a second valve comprising a second valve member and one or more cooperating second valve seats, an actuator coupled to both the first and second valve members through which a force may be applied to urge the first valve member open or closed and to urge the second valve member open or closed, a coupling between the actuator and the first valve member, wherein the coupling between the actuator and the first valve member comprises a connector which extends at least partially through the second valve member.
A valve unit for regulating the flow of working fluid between a working chamber of a fluid working machine and both a first working fluid line and a second working fluid line, the valve unit comprising:
A valve unit according to claim one, wherein the actuator is a solenoid actuator.
A valve unit according to claim one, wherein the one or more first and one or more second valve seats are coaxial.
A valve unit according to claim one, wherein the first and/or second valve member has two valve seats, which seal a port or ports lying between the two seats.
A valve unit according to claim one, wherein the first and second valve members are located within the valve unit.
A valve unit according to claim one, comprising one or more flow passages extending at least in part in an outwards direction, for coupling one or more first valve seats to a hydraulic line and/or one or more radially outwards extending flow passages for coupling one or more second valve seats to a hydraulic line.
A valve unit according to claim one, wherein the first valve member is an annular valve and the one or more first valve seats are an annular valve seat and the annular first valve member and the annular valve seat are configured to together define inner and outer sealing lines extending around the periphery of the annular first valve member and the annular valve seat when the annular first valve member is in sealing engagement with the annular valve seat.
A valve unit according to claim one, configured such that actuation of the actuator causes the first valve to open or close and subsequently causes the second valve to open or close.
A valve unit according to claim one, wherein the connector extends through the second valve member.
A valve unit according to claim one, wherein the connector comprises a hydraulic connector.
A fluid working machine comprising a low pressure line, a high pressure line, a working chamber, and a valve unit according to any one preceding claim, wherein the first and second valves are in fluid communication with the working chamber and the first and second valve seats are coupled to the low and high pressure lines respectively to thereby regulate the flow of working fluid between the working chamber and the low and high pressure lines.
Dependencies are inferred from the claim text.