Positive displacement rotary pumps with improved cooling
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United States of America Patent
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Sep 2, 2014
Grant Date -
Dec 27, 2012
app pub date -
Jun 23, 2011
filing date -
Jun 23, 2011
priority date (Note) -
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Abstract
Various rotary pumps are disclosed that are designed to pump viscous fluids or slurries. Often, the seals of such pumps can become over heated. The disclosed pumps include slots disposed in the rotors and/or slots disposed in the openings through which the drive and driven shafts task so that some of the fluid being pumped through the pumping chamber can migrate through the proximal wall of the pump casing to the seal assemblies disposed on the other side of the proximal wall of the pump casing. Thus, the seal assemblies of the pumps are cooled without resorting to the use of a cooling jacket or other cooling mechanism.
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