A liquid delivery system comprises a tank containing a supply of liquid. A positive displacement pump operates to withdraw the liquid from the tank via a suction conduit and to deliver a pressurized flow of the liquid via a delivery conduit. A metering orifice in the delivery conduit serves to modulate the flow of the liquid through the delivery conduit. A normally closed first valve located in the delivery conduit between the pump and the metering orifice is opened in response to a pressure of the liquid exceeding a threshold level, and is operative when open to deliver the liquid to the metering orifice at a substantially constant pressure. A bypass conduit communicates with the tank and with the delivery conduit at a location between the pump and the first valve.
申请公布号
WO2012094202(A1)
申请公布日期
2012.07.12
申请号
WO2011US67506
申请日期
2011.12.28
申请人
GLOBAL AGRICULTURAL TECHNOLOGY AND ENGINEERING, LLC;NEWTON, JOHN, R.;CHENEY, MICHAEL, E.;BROOKE, PETER, J.
发明人
NEWTON, JOHN, R.;CHENEY, MICHAEL, E.;BROOKE, PETER, J.