Multi stage type flow rate switching device

Details Multi stage type flow rate switching device Multi stage type flow rate switching device

1997-10-15

1999-07-20

Coggins, Wynn Wood

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604250, 13762518, 251 7, A61M 500

Patent

active

059250232

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.

REFERENCES:
patent: 4688753 (1987-08-01), Tseng et al.
patent: 4950255 (1990-08-01), Brown et al.
patent: 5318515 (1994-06-01), Wilk

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