Computer controlled hydraulic bleed sequence
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United States of America Patent
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May 28, 2019
Grant Date -
Apr 27, 2017
app pub date -
Jan 6, 2017
filing date -
Dec 11, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
An agricultural machine or implement has a main frame section and at least one wing section, each having lift cylinders. A main shank frame may be pivotally attached to the main frame section and may have hydraulically adjustable gauge wheels. Wing shank frames may be pivotally attached to the wing sections and may also have hydraulically adjustable gauge wheels. Bypass circuits may be used to individually adjust the lift cylinders and gauge wheel cylinders. A controller or controllers is used to purge air from the lift cylinders, gauge wheel cylinders, cylinders used to raise the shank frames for transport, and from the bypass circuits. The purge routine may be selectable as individual steps, hydraulic subsystem purges, or as one automatic purge routine.
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