Hydraulically controlled reciprocating pump system
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United States of America Patent
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Nov 26, 2013
Grant Date -
May 26, 2011
app pub date -
Nov 23, 2009
filing date -
Nov 23, 2009
priority date (Note) -
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Abstract
A system for pressurizing a working fluid includes a cylinder having an outlet through which the working fluid is exhausted at a discharge pressure, a plunger translatably disposed within the cylinder, and a hydraulic system. The plunger has a first piston coupled thereto, a second piston disposed opposite the first piston, wherein the second piston is driven to reciprocate, and a variable-volume chamber disposed between the first and second pistons. The hydraulic system is operable to adjust the volume of hydraulic fluid within the variable-volume chamber, whereby the discharge pressure is maintained substantially at a predetermined level.
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