ADJUSTABLE LIQUID LEVEL CONTROL FOR PUMPS

摘要

A pressure responsive pumping system comprising a motor driven impeller pump, a pressure responsive switch controlling the pump motor, and a pressure-sensing device comprising a tube extending through a side wall of the pump casing and slidable substantially radially thereof, a port adjacent the inner end of the tube, and a conduit connecting the outer end of the tube to the switch. More specifically an impeller pump having a flat end wall, an opening in its peripheral wall, a channel at the inner side of the end wall in alignment with the opening, and a tube slidable longitudinally through the opening and along said groove having a port at its inner open end, or at a side thereof adjacent its inner closed end.