Unit and method for discharging loose material from a dispensing device
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United States of America Patent
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Sep 14, 2004
Grant Date -
Oct 31, 2002
app pub date -
Apr 18, 2002
filing date -
Apr 27, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A unit for discharging loose material from a dispensing device to a user unit comprises a discharge tube leading to the user unit and a valve element connecting the dispensing device to the infeed end of the tube. The valve element comprises a first annular element equipped with a shutter device, consisting of a first shutoff element and a second shutoff element connected to each other by permanent magnets, and a second annular element connected to the infeed end of the tube. When the first and second annular elements are separated by the operation of pistons, a gap is created between the two shutoff elements. A pair of concentric seals positioned between the first and the second annular elements isolate the gap from the outside environment so that a cleaning fluid can be made to flow into it.
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