<p>Post driving apparatus of a kind dependent on a hydraulic ram to raise the monkey for an ensuring drop; wherein there is a provision to dump hydraulic fluid from the ram into the hydraulic circuit to allow the drop of the monkey; and wherein interactive valving or some equivalent arrangement requires both hands of the operator to be employed on valve and / or other actuator(s) to allow the driving drop.</p>
申请公布号
WO2010064937(A1)
申请公布日期
2010.06.10
申请号
WO2009NZ00274
申请日期
2009.12.02
申请人
FAIRBROTHER INDUSTRIES LIMITED;FAIRBROTHER, JAMES, ERNEST