Patent ID: 8435016
Filing Date: 2013-05-07
Classification: F04C

Abstract:
1. A vertical shaft pumping system comprising: a hollow shaft with an inner bore, a lower end with an inlet and an upper end with an outlet, the upper end with at least one liquid distribution hole; an impeller positioned at the lower end of the shaft, with a cylindrical base portion with a lower end, a central hole for drawing fluid into the shaft, an outer cylindrical circumference and a plurality of teeth extending upwards from the cylindrical base portion and extending radially from the central hole to the outer cylindrical circumference for increasing tractive force of liquid in the shaft when the impeller and shaft are rotating, with each of the plurality of teeth having an upper surface that is angled radially and each of the teeth being separated by a radial slot extending from the central hole to the outer cylindrical circumference; and a motor for rotating the shaft with the impeller to centrifugally pump a liquid vertically in the shaft from the inlet end to the outlet end.