Title:
Backflow Prevention Device and Dialysis Apparatus with the Backflow Prevention Device
Document Type and Number:
WIPO Patent Application WO/2019/119414
Kind Code:
A1
Abstract:
A backflow prevention device (1), comprising: an inlet chamber (2) comprising at least two ports(21,22), in which a first port (21) is used for receiving a fluid; a chamber-separating component (6) comprising a separating member (61) and a relief valve (62); an outlet chamber (4) is separated from the inlet chamber (2) by the separating member (61); the relief valve (62) being operatively connected with the separating member (61) for opening or closing a drain port (43) of the outlet chamber (4); wherein the fluid is allowed to be delivered from the outlet chamber (4) only when the relief valve (62) is closed by means of a differential pressure applied on the separating member (61). And a dialysis apparatus comprising the backflow prevention device (1).The backflow prevention device (1) has simple structure, reduced dead space and small sizes and can work reliably.
Inventors:
JOR JOSEPH (CN)
Application Number:
PCT/CN2017/117991
Publication Date:
June 27, 2019
Filing Date:
December 22, 2017
Export Citation:
Assignee:
FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH (DE)
FRESENIUS MEDICAL CARE R&D SHANGHAI CO LTD (CN)
FRESENIUS MEDICAL CARE R&D SHANGHAI CO LTD (CN)
International Classes:
F16K15/14; A61M1/28
Foreign References:
| CN102252116A | 2011-11-23 | |||
| CN202397973U | 2012-08-29 | |||
| CN105363086A | 2016-03-02 | |||
| EP1027901A2 | 2000-08-16 | |||
| US4948092A | 1990-08-14 | |||
| US20110108482A1 | 2011-05-12 | |||
| US3818929A | 1974-06-25 | |||
| CN101936412A | 2011-01-05 | |||
| JP2866874B2 | 1999-03-08 |
Other References:
See also references of EP 3728912A4
Attorney, Agent or Firm:
NTD PATENT AND TRADEMARK AGENCY LIMITED (CN)
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