Title:
CLOSING VALVE MADE OF SHEET AND BAG WITH CLOSING VALVE
Document Type and Number:
WIPO Patent Application WO/2019/009139
Kind Code:
A1
Abstract:
A closing valve made of a sheet and a bag equipped therewith that effectively functions as a check valve not only in instances of a large pressure difference, but also during lengthy periods of equilibrium with a small pressure difference. An upstream valve segment (a) disposed on the upstream side and a downstream valve segment (c) disposed on the downstream side are provided as valve segments for a closing valve, with a buffer segment (b) for causing a fluid to be retained in a flow path disposed therebetween. The buffer segment (b) has a lower tightness vis-à-vis the flow path than the downstream valve segment (c), and the upstream valve segment (a) has a lower tightness than the downstream valve segment (c). The length of the buffer segment (b) is permitted to be greater than that of the upstream valve segment (a) and/or downstream valve segment (c).
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Inventors:
KOYANAGI YOSHIHUMI (JP)
Application Number:
PCT/JP2018/024144
Publication Date:
January 10, 2019
Filing Date:
June 26, 2018
Export Citation:
Assignee:
KASHIWARA SEITAI CO LTD (JP)
International Classes:
B65D30/24; B65D81/26; F16K15/14
Foreign References:
| JP2012254828A | 2012-12-27 | |||
| JPH0542147U | 1993-06-08 | |||
| JPH07309351A | 1995-11-28 | |||
| JPH0314614Y2 | 1991-04-02 | |||
| JP2005219766A | 2005-08-18 | |||
| JPS502845B1 | 1975-01-29 | |||
| JPH0542034Y2 | 1993-10-22 | |||
| JPH0245373A | 1990-02-15 |
Other References:
See also references of EP 3650367A4
Attorney, Agent or Firm:
SAMEJIMA Takenobu (JP)
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