Gear pump
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United States of America Patent
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Feb 21, 2012
Grant Date -
May 14, 2009
app pub date -
Jan 13, 2009
filing date -
Jun 3, 2002
priority date (Note) -
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Abstract
A pump comprises a driving rotor and a driven rotor that are positioned in a housing such that, as the driving rotor and the driven rotor rotate, the teeth of the driving rotor and the teeth of the driven rotor mesh to form a positive displacement seal. The teeth of the driving rotor and the driven rotor are configured such that seals between the inlet side and the discharge side of the pump are formed between only the leading surfaces of the teeth of the driving rotor and the trailing surfaces of the teeth of the driven rotor.
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