Patent ID: 8511998

Claim:
A slurry pump impeller comprising a front shroud and a back shroud each having an inner main face with an outer peripheral edge and a central axis, a plurality of pumping vanes extending between the inner main faces of the shrouds, the pumping vanes being disposed in spaced apart relation, each pumping vane including opposed main side faces one of which is a pumping or pressure side face, a leading edge in the region of the central axis and a trailing edge in the region of the outer peripheral edges of the shrouds with a passageway between adjacent pumping vanes, each passageway having associated therewith a discharge guide vane, each discharge guide vane being disposed within a respective passageway and having all points along the center axis of the discharge guide vane extending from the leading edge to the trailing edge thereof located closer to one or the other of the pumping vanes and each discharge guide vane projecting from the inner main face of at least one of the or each shrouds.