Gear pump with pressure balancing structure
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United States of America Patent
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Sep 8, 1992
Grant Date -
N/A
app pub date -
Apr 12, 1991
filing date -
Apr 12, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A gear pump which includes a pressure balancing structure to ensure balanced pressure within the pump chamber during low flow operation is disclosed. A groove is formed in the casing internal surface throughout the entire axial length of the gears and supplies high pressure fluid to positions within the pump chamber which are at a high pressure during normal flow operation. This groove thus ensures that high pressure fluid will be at all locations within the pump chamber which are expected to have high pressure during normal pumping operation. Forces on the gear are as expected during low flow operation, and that the gears will not be forced in an undesirable direction.
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