Dobson, David A.,Sheppard, Clint W.,Lesanko, John A.
申请号：
AU2007308706
公开号：
AU2007308706B2
申请日:
2007.10.23
申请国别(地区):
AU
年份:
2012
代理人:
摘要：
A static hydraulic system provides yieldable hold-down force to the ground-engagingtools 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-clearingposition when placed in the lifting mode. An accumulator and pressure-reducingvalve are incorporated into the hydraulic circuit in such a way that the systemneed not be an active hydraulic system in which a pump on the tractor would continuouslycirculate pressurized fluid in the system during ground-engaging operationsin the hold-down mode.
