Rotary positive-displacement pump with meshing gear wheels without encapsulation, and gear wheel for such a positive-displacement pump
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United States of America Patent
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Aug 3, 2004
Grant Date -
Dec 18, 2003
app pub date -
Jun 3, 2003
filing date -
Jun 12, 2002
priority date (Note) -
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Abstract
A rotary positive-displacement pump comprises two gear wheels which mesh with each other without encapsulation. Each gear wheel has a plurality of teeth with a profile which falls within a band of tolerance of .+-.1/20th of the depth of the tooth with respect to a theoretical profile similar to a profile defined by a natural spline function passing through a plurality of nodal points having pre-established coordinates {X, Y}.
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