Patent ID: 6048168
Filing Date: 2000-04-11
Classification: F04D,F05C

Abstract:
A pump assembly for a centrifugal, between bearing pump with dry running capability, driven by conventional means, comprising:a) a casing having two halves;b) a shaft having an inboard end and an outboard end;c) an impeller cantilevered to the shaft and interposed between and supported by the two halves of the casing;d) an inboard rolling element comprising anti-friction bearings having ceramic balls supporting said shaft at said inboard end, said anti-friction bearings of said inboard rolling element being lubricated by liquid being pumped and being disposed in a seal chamber open to liquid being pumped and providing an external seal for the pump;e) an outboard rolling element comprising anti-friction bearings having ceramic balls supporting said shaft at said outboard end, said anti-friction bearings of said outboard rolling element being lubricated by liquid being pumped and being disposed at the outboard end of the shaft open to liquid being pumped; andf) a closure external to the outboard end of the shaft.