Positive displacement pump apparatus and method
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United States of America Patent
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Aug 30, 2011
Grant Date -
Mar 20, 2008
app pub date -
Apr 3, 2007
filing date -
Aug 8, 2006
priority date (Note) -
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Abstract
An improved positive displacement rotary pump apparatus and method is provided. The pump may include a front cover, a rotor body forming a chamber with the front cover, a gear case supporting a pair of hollow drive shafts, and a pair of rotors disposed in the chambers and each detachably mounted to one end of a respective hollow drive shaft via a stud that extends from the rotor through the hollow shaft to a fastener.
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