Title:
FLOW PASSAGE SWITCHING DEVICE
Document Type and Number:
WIPO Patent Application WO/2004/101061
Kind Code:
A1
Abstract:
A flow passage switching device capable of increasing the substituting speed of chemicals mixedly filled in branch parts, wherein a first flow passage for connecting the first branch part to the third branch part of a device body and a second flow passage for connecting the second branch part to the third branch part are provided in the shaft part of a switching part so that, when the switching part where all branched parts are allowed to communicate with each other, fluid always flows in the switching part and the accumulation of the fluid in the switching part can be suppressed, and two first and second through-holes allowed to communicate with the inside of the third branch part are drilled, independently of each other, in a shaft holding part at positions which are opposed to the flow passage end of the first flow passage and the flow passage end of the second flow passage when the switching part is rotated to that position, whereby since the speed of the fluid flowing into the third branch part is increased, the substitution of the chemical mixedly filled in the third branch part can be promoted.
Inventors:
YUKI TAKEHIKO (JP)
UEMATSU RAITA (JP)
UEMATSU RAITA (JP)
Application Number:
PCT/JP2003/006001
Publication Date:
November 25, 2004
Filing Date:
May 14, 2003
Export Citation:
Assignee:
JMS CO LTD (JP)
YUKI TAKEHIKO (JP)
UEMATSU RAITA (JP)
YUKI TAKEHIKO (JP)
UEMATSU RAITA (JP)
International Classes:
A61M39/00; A61M39/02; A61M39/22; F16K11/076; (IPC1-7): A61M39/22
Foreign References:
| EP1234596A1 | 2002-08-28 | |||
| JP2000350787A | 2000-12-19 |
Attorney, Agent or Firm:
Nakajima, Shiro (2-1 Toyosaki 3-chome, Kita-k, Osaka-shi Osaka, JP)
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