Pump apparatus and hydraulic actuator
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United States of America Patent
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Jan 2, 2018
Issued Date -
N/A
app pub date -
Sep 19, 2014
filing date -
Mar 25, 2014
priority date (Note) -
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Abstract
A pump apparatus includes: a pump that ejects a hydraulic fluid; and a selector valve that switches a direction of a flow of the hydraulic fluid to be supplied to one of a first chamber and a second chamber of a cylinder apparatus, which is internally partitioned by a piston into the first chamber extending during an extending stroke of the cylinder apparatus, and the second chamber extending during a shortening stroke of the cylinder apparatus, and the selective valve has, at a channel connected to the second chamber, an orifice that is narrower than a channel connected to the first chamber.
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