Impeller with Anti-vapor lock mechanism
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[0057]The present invention is directed to a pump for pumping water, sewage, or other liquid material from one location to another. The pump includes an impeller, or impeller that is rotated in moderately close proximity to a stationary plate or stator. The stationary plate has a central, coaxial inlet through which liquid passes, and is thereafter conveyed by centrifugal force along the impeller-plate spacing to an outlet at the periphery of the impeller and the plate.
[0058]The pump may be any conventionally available pump such as centrifugal pump, an impeller pump, or a mixed flow. Preferably, the pump is a centrifugal pump, such as a centrifugal rotary bilge pump that is well known in the art.
[0059]Centrifugal pumps are classified into three categories—submersible, dewatering and trash.
[0060]Submersible pumps offer contractors versatility on the job site. These pumps are, by definition, submersible in water containing solids up to one-quarter inch in diameter and less than 10 per...
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