Patent ID: 7780406
Filing Date: 2010-08-24
Classification: F04D,F05D

Abstract:
1. A pump comprising: a motor having a rotating shaft and a first centerline; an adapter plate operatively connected to the motor; a housing operatively connected to the adapter plate, the housing including a first opening and a second opening, the housing further including a second centerline; a seal assembly positioned between the adapter plate and housing; an impeller operatively connected to the motor shaft, the impeller positioned in the housing; and a diffuser positioned adjacent to the impeller and operatively connected to the seal assembly, the diffuser having a cone shave and a cross-sectional area that gradually decreases from the second opening to the impeller, the diffuser and the impeller extending into the first opening, the housing and the motor being configured so that the second centerline is above the first centerline in order to allow a larger volume of water to reside above the diffuser than below the diffuser to facilitate self priming of the pump.