Rod equal displacement cylinder in a rapid transfer and feed system

摘要: A single rod three chamber fluid cylinder is driven in an initial rapid advance forward stroke by a main pump, pumping through proportional directional control valve to act against first equal area at the head end of piston. Fluid expelled from second side piston returned reservoir which position while two its allowing accumulator fill third exposed side. When shifting feed stroke, switches disconnecting and connecting pump also connected area. Upon return piston, sump routed accumulator.