Electronically controlled hydraulic swing system
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United States of America Patent
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Jan 30, 2018
Issued Date -
N/A
app pub date -
Mar 3, 2015
filing date -
Mar 4, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A hydraulic circuit for use on a construction machine includes a first valve, a second valve, and at least a third valve. The second and third valve each includes at least one inlet port connected to a first outlet port of the first valve. The first outlet port of each of the second and third valves are configured to reduce a first pressure to a second pressure and/or a third pressure downstream of the second valve and the third valve, respectively. The second valve and the third valve also include at least a second outlet port connected to a reservoir tank. A hydraulic motor is connected to the first outlet port of the second valve, which operates the hydraulic motor in a first direction. The hydraulic motor also is connected to the first outlet port of the third valve, which operates the hydraulic motor in a second direction.
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