Diaphragm valve
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United States of America Patent
Stats
-
Jun 26, 2001
Grant Date -
N/A
app pub date -
Oct 1, 1999
filing date -
Apr 4, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A diaphragm valve including a valve housing having at least three ports and at least two valve chambers provided in the valve housing. Each valve chamber has at least one first space communicating with a respective one of the ports and a second space separated from the first space by a threshold. The second space of each valve chamber communicates only with the second space of others of the at least two valve chambers, such that communication between any two of the at least two ports can take place only by passing across two thresholds.
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