Anti-airlock pump
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United States of America Patent
Stats
-
May 6, 2014
Grant Date -
Aug 16, 2012
app pub date -
Feb 15, 2011
filing date -
Feb 15, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A pump having anti-airlock provisions. The pump is comprised of a volute comprised of a volute wall, and an impeller comprising back vanes on a side of the impeller that is proximate to the volute wall, with the back vanes having a length extending radially outwardly along the impeller. A bleed hole is formed in the volute wall in communication with the portion of the volute between the back vanes and the volute wall, and the exterior of the volute, such that the bleed hole is located midway along the length of the back vanes. When the pump is operating with air, liquid, or a combination of air and liquid in the volute, the bleed hole is under positive pressure with respect to the exterior of the volute. The bleed hole may be in communication with the exterior of the volute through a lateral tunnel formed in the pump.
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Family
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