Multi stage type flow rate switching device
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United States of America Patent
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-
Jul 20, 1999
Grant Date -
N/A
app pub date -
Oct 15, 1997
filing date -
Oct 15, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A multi stage type flow rate switching device is provided which simplifies switching of flow paths and which rarely causes erroneous operation. The multi stage type flow rate switching device includes a liquid medicine flow inlet port 1 having branch paths 11, 12 and 13 on a downstream side, a liquid medicine flow outlet port 2 having branch paths 21, 22 and 23 on an upstream side and constant flow rate paths 31, 32 and 33 for connecting respective branch paths, and arranged in a housing 4 comprising a lid 41 and a housing main body 42. In the housing 4, there is provided clamping means 5 capable of selectively blocking the constant flow rate paths 31, 32 and 33.
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