Multi-pump sequencing
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United States of America Patent
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Feb 19, 2013
Grant Date -
Oct 14, 2010
app pub date -
Apr 10, 2009
filing date -
Apr 10, 2009
priority date (Note) -
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Abstract
A pump system for pumping a viscous material that includes N positive displacement pumps, where N is an integer greater than two, and a hydraulic drive. Each pump has an inlet and an outlet therefrom, and a pair of cylinders each with a piston movable in a reciprocating stroke cycle therein. The hydraulic drive is connected to the N positive displacement pumps to reciprocate the pistons within the cylinders. The stroke cycle includes a discharging stroke and a filling stroke. The discharging stroke and the filling stroke of the N positive displacement pumps are staggered from one another by 1/N stroke positions such that no two pumps have pistons in the same stroke position at the same time.
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