Pilot-controlled valve having a ceramic control piston
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United States of America Patent
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Jan 13, 2015
Issued Date -
N/A
app pub date -
Jul 25, 2008
filing date -
Jul 27, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A pilot-controlled valve having a valve system switches a pressure medium flow between at least one working connection, a supply pressure connection and a ventilation connection, and includes at least one valve member of ceramic material operated rotationally/linearly by pilot control, at least one connecting channel is bringable into flow connection to the working connection, which, based on the valve member's position, produces a flow connection of the working connection to a first flow channel connected to the ventilation connection or to a second flow channel that is connected to the supply pressure connection, at least one section of the first and second flow channels being in at least one static valve body of ceramic material, at least the first flow channel is sealed from the second flow channel by at least one seal that is in a region outside a direct inflow by the pressure medium.
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