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1. (WO2014205439) DEBRIS REMOVING IMPELLER BACKVANE

Pub. No.:    WO/2014/205439    International Application No.:    PCT/US2014/043660
Publication Date: Thu Dec 25 00:59:59 CET 2014 International Filing Date: Tue Jun 24 01:59:59 CEST 2014
IPC: F04D 29/24
Applicants: FLOW CONTROL LLC.
Inventors: LOPES, Jeffrey D.
Title: DEBRIS REMOVING IMPELLER BACKVANE
Abstract:
A pump having an impeller with front and back sides, for rotating on a shaft with the front side nearest an inlet and the back side nearest a motor housing, to provide a main flow of the liquid from the inlet to the outlet and a rear impeller flow of the liquid in an area between the impeller's back side and the motor housing. The back side having a logarithmic spiral-shaped vane to constantly sweep, and expel debris from, the area.