PUMP STRUCTURE

摘要

A pump structure has a pump housing which includes a pump chamber for drawing a fluid from a tank mounted on the pump houslny and discharging the fluid, a flow control valve for limiting the rate at which the fluid discharged from the pump chamber flows. The pump housing has a relief fluid passage communicating between ths flow control valve and the tank and an lnlet fluid passaye communicatlng between an lnlet port of the pump chamber and the tank, the relief fluld passage and the inlet fluid passage being separate from and independent of each other.