Rotary pump with vented pump chamber
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United States of America Patent
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-
Nov 1, 2005
Grant Date -
Sep 9, 2004
app pub date -
Feb 20, 2004
filing date -
Mar 5, 2003
priority date (Note) -
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Abstract
A rotary pump includes a pump chamber disposed above a liquid basin, and a radial impeller with a vertical axis disposed in the pump chamber. An intake connecting piece is disposed coaxially with the impeller and is positioned in the liquid basin. Either an inner part of the radial impeller or an axial impeller in the intake connecting piece, is provided for aspirating liquid in an interior region of the pump chamber. Venting channels lead from the interior region of the pump chamber to an outside and extend along a side wall of the intake connecting piece up to about a plane of the intake opening of the intake connecting piece. At least one venting channel has a lateral opening in the side wall of the intake connecting piece which opens essentially in a radial direction to the pump chamber.
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