Combination Hydraulic Hold-Down and Lift System for an Agricultural Implement
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United States of America Patent
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Issued Date -
Apr 24, 2008
app pub date -
Oct 22, 2007
filing date -
Oct 24, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A static hydraulic system provides yieldable hold-down force to the ground-engaging tools of an implement when the system is in its hold-down mode. Alternatively, the system can be operated in a way to lift the tools into an elevated ground-clearing position when placed in the lifting mode. An accumulator and pressure-reducing valve are incorporated into the hydraulic circuit in such a way that the system need not be an active hydraulic system in which a pump on the tractor would continuously circulate pressurized fluid in the system during ground-engaging operations in the hold-down mode.
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