| 摘要 |
<p>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 respectively of the branch paths, and they are 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. <IMAGE></p> |
