Pump having wear and wear rate detection
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United States of America Patent
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Jun 6, 2017
Grant Date -
Apr 23, 2015
app pub date -
Oct 17, 2013
filing date -
Oct 17, 2013
priority date (Note) -
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Abstract
Apparatus and method for supplying lubricant to a plurality of lubrication sites. The apparatus includes a controller that diagnoses piston wear by driving the pump to achieve a predetermined pressure, stopping the pump with the piston in a home position, and measuring pressure at a preselected time interval after the step of stopping the pump. The amount of piston wear is approximated based on a difference between the predetermined pressure and the measured pressure at the predetermined time interval.
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