Flow regulating apparatus for a fluid, in particular a pneumatic choke valve
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United States of America Patent
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Oct 12, 2004
Grant Date -
Jan 30, 2003
app pub date -
Jul 24, 2002
filing date -
Jul 24, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A flow regulating apparatus for a fluid, in particular a pneumatic choke valve, includes a housing having an inlet port and an outlet port fluidly connected by a choke channel. A throttling piston is disposed in the choke channel for movement in longitudinal direction between an initial position and an end position. The throttling piston includes a tapered section to define with the choke channel an overflow passage whose cross section is dependent on a position of the throttling piston, wherein the tapered section is configured such that a movement of the throttling piston from the initial position to the end position results in a progressive increase of the cross section of the overflow passage.
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