Fluid-operated drive
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United States of America Patent
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Feb 27, 2018
Issued Date -
N/A
app pub date -
Dec 23, 2015
filing date -
Dec 23, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
In a fluid-operated drive for a field device, the drive being designed to set a control valve of the field device, a fluidically operated basic drive is provided with a basic working chamber loaded fluidically and delimited by a basic drive housing part and by a basic actuating piston guided in the basic drive housing part. At least one supplementary drive is provided with a supplementary working chamber loaded fluidically and delimited by a supplementary drive housing part. The basic drive housing part and the supplementary drive housing part are displaceable in one another in accordance with a piston and chamber arrangement so that a volume of the supplementary chamber changes in the event of a relative movement of the drive housing parts.
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