CYLINDER ON DEMAND HYDRAULIC DEVICE
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United States of America Patent
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Issued Date -
Oct 13, 2022
app pub date -
Apr 22, 2022
filing date -
Oct 25, 2019
priority date (Note) -
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Abstract
A hydraulic device having: a plurality of main piston-cylinder arrangements, each of the respective pistons having a fixed stroke length and configured for axial reciprocation within their respective cylinder; a plurality of flow control valves for switching between a lockdown state and an unlocked state of one or more of the plurality of main piston cylinder arrangements during operation of the hydraulic device; and one or more control valves for directing the plurality of flow control valves between their respective unlock and lock positions.
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