VARIABLE DISPLACEMENT PUMP REGULATOR
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United States of America Patent
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Issued Date -
Aug 13, 2015
app pub date -
Nov 25, 2013
filing date -
Dec 11, 2012
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Abstract
A regulator includes a feedback lever configured to move a compensating sleeve in an axial direction of a compensating spool. The compensating spool and the compensating sleeve form: a self-pressure introduction chamber, into which a self-pressure of a pump is introduced; and a pressure adjuster configured to output a control pressure from the self-pressure introduction chamber to a large-diameter pressure receiver of a servo piston. The compensating sleeve includes a stepped portion, to which a pressure in a direction in which a control spring urges the compensating spool is applied when the self-pressure is introduced into the self-pressure introduction chamber.
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