Hydraulic distributor for pump
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United States of America Patent
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Apr 17, 2018
Issued Date -
N/A
app pub date -
Jul 13, 2015
filing date -
Jul 13, 2015
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A pump has a pump body and at least first and second pumping elements, each pumping element including a piston defining a head-end and a rod-end. The pump receives a pressurized fluid at an inlet, and returns fluid through a drain outlet. A hydraulic distributor operates to fluidly connect the head end of an extending piston to the pressurized fluid, and the rod end of the extending piston to the drain outlet. The hydraulic distributor further connects the rod-end of a retracting piston to the drain outlet, and the rod-end of one or more retracting pistons to the drain or to a return pressure, which is lower than an extending pressure.
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