Self-draining centrifugal pump having an improved inlet
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United States of America Patent
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-
Aug 15, 2000
Grant Date -
N/A
app pub date -
Nov 9, 1998
filing date -
Nov 9, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A centrifugal pump for use in whirlpool bath systems has an offset inlet chamber configured to provide a smooth transition from inlet to impeller which is suitable for one-step injection molding using two opposed molding cores that may be removed from the inlet in opposite directions. The chamber has a double 'D' profile with opposite flattened side surfaces. The cross-sectional area of the chamber decreases progressively between a larger offset inlet aperture and a smaller, centered entrance to the impeller. This configuration improves pumping efficiency while reducing noise.
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