Positioner
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Aug 30, 2016
Grant Date -
Apr 30, 2015
app pub date -
Oct 27, 2014
filing date -
Oct 29, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A positioner includes: an explosion proof container containing, in an interior space, an electric circuit module and an electropneumatic converter converting, into pneumatic signals, electric signals processed by the electric circuit module; and a pneumatic amplifier, provided outside of the explosion proof container, amplifying the pneumatic signal converted by the electropneumatic converter. The explosion proof container is formed with air flow paths for the air fed into the pneumatic amplifier and the air fed out of the pneumatic amplifier, in a thick portion between inner and outer wall faces of the container that encompasses the surrounding of the interior space. The air flow paths are formed along an inner wall face of the explosion proof container. The inner wall face of the explosion proof container where on the air flow path is formed is arc-shaped or a shape that uses many curved faces of free curve shapes.
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