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1. (WO2013120049) ROTARY LOBE PUMP WITH WIPER BLADES

Pub. No.:    WO/2013/120049    International Application No.:    PCT/US2013/025499
Publication Date: Fri Aug 16 01:59:59 CEST 2013 International Filing Date: Tue Feb 12 00:59:59 CET 2013
IPC: F01C 19/02
Applicants: DIXON, Randy
Inventors: DIXON, Randy
HOWELL, Bret
Title: ROTARY LOBE PUMP WITH WIPER BLADES
Abstract:
A positive displacement rotary pump with an improved impeller design integrating replaceable wiper inserts. The impeller generally has or more lobes and an equal number of conjugate surfaces. Each lobe has an arcuate peripheral end comprising a plurality of wiper blades. The wiper blades improve efficiency by making a seal with a pump chamber or the conjugate surface on the other impeller as it rotates. The wiper blades are arranged such that constant and successive contact between wiper blades and impellers is achieved.