Pump displacement control mechanism
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United States of America Patent
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Nov 4, 2014
Issued Date -
N/A
app pub date -
Oct 31, 2011
filing date -
Oct 31, 2011
priority date (Note) -
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Abstract
A control arm assembly connected with a hydraulic pump allows for the adjustment of pump displacement by turning a threaded adjustment rod clockwise or counter-clockwise to move a half nut connected with a control rod vertically up or down in a slot of an arm to the desired set point. The half nut has a partial thread that engages the thread of the adjustment rod to control the vertical movement. The design allows for the positive repeatable finite adjustment of the half nut with minimal backlash that reduces the difficulty of the setting process in labor and assembly time. Once the desired set point has been met the adjustment rod is clamped tight to the second arm by tightening the nut against the notch to lock up the assembly to prevent any movement.
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