Submersible pump equipped with cutter

Claim 1

A submersible pump equipped with cutters for cutting foreign material carried by the liquid being pumped comprising: a. a rotating vane-wheel having a circular lower inlet portion, a circular outlet portion, and a cutter bar carried at the circular lower inlet portion thereof, said cutter bar being flat and extending diametrically across said circular lower inlet portion in a plane perpendicular to the axis of rotation of said vane-wheel, with the area above said cutter bar being entirely open in said vane-wheel and said circular lower inlet portion likewise being open except for said cutter bar so as to minimize flow restriction through said vane-wheel, b. a fixed pump casing having a lower inlet portion concentrically arranged around the circular lower inlet portion of said vane-wheel, said casing being formed with cutter means extending into said lower inlet portion of said casing below said cutter bar of said vane-wheel, said cutter means comprising flat bar means extending diametrically across said lower inlet portion parallel to and spaced from said cutter bar carried by said vane-wheel, the lower inlet portion of said pump casing being entirely open except for said flat bar means so as to not significantly adversely affect the volume of liquid delivered to said pump, the rotation of said vane-wheel, and thus the cutter bar carried thereby, serving to cut into pieces foreign objects pumped into said inlet portions with the liquid being pumped.