Hard material impeller and methods and apparatus for construction
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United States of America Patent
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Jan 17, 2006
Grant Date -
Nov 4, 2004
app pub date -
May 2, 2003
filing date -
May 2, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Methods of producing impeller castings from very hard materials are disclosed in which the formation of a selectively configured core produces an impeller casting that does not need to be machined to receive the drive shaft and eliminates the need for employing a lead babbitt or soft insert, as is known in the prior art, to receive the drive shaft, thereby producing a hard material impeller for a centrifugal pump that is significantly less costly to produce and is environmentally safe.
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