Pumps – Motor driven – Electric or magnetic motor
Reexamination Certificate
2005-02-22
2005-02-22
Tyler, Cheryl J. (Department: 3746)
Pumps
Motor driven
Electric or magnetic motor
C417S319000, C417S313000, C417S360000, C418S206100, C418S206600, C418S104000
Reexamination Certificate
active
06857860
ABSTRACT:
The invention concerns a metering gear pump comprising a set of gears supported and guided solely by the inner peripheral surface of the lobe of the chamber wherein they are housed. They do not comprise any shaft to act as support or guide, thereby enabling to reduce significantly useless spaced difficult to rinse when changing the product to be pumped. For the same purpose, the driving shaft is flexibly connected to the driving gear. Such arrangement provides the advantage of requiring only one single packing seal. Such a pump, connected to a drive motor and an encoder delivering a signal proportional to the number of pump cycles, enables to provide an accurate metering pump for numerous uses.
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Ruegg Joseph
Zimmermann Philippe
Pearne & Gordon LLP
Pomtava SA
Solak Timothy P.
Tyler Cheryl J.
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