Hydraulic circuit
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United States of America Patent
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N/A
Issued Date -
Nov 22, 2012
app pub date -
May 18, 2011
filing date -
May 18, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A hydraulic circuit and method includes a valve subsystem between a high pressure source, a medium pressure source, a low pressure return, and an actuator. The valve subsystem is configured and controllable to drive the actuator using the high pressure hydraulic fluid or the medium pressure hydraulic fluid and also to direct low pressure hydraulic fluid exiting the actuator to the low pressure return. A controller is responsive to high pressure criteria and medium pressure criteria associated with the actuator and is configured to operate the valve subsystem to present high pressure hydraulic fluid to the actuator in response to high pressure criteria and to present medium pressure hydraulic fluid to the actuator in response to medium pressure criteria.
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