Title:
THREE-WAY DEVICE FOR ANTI-BACKFLOW INFUSION AND DOSING
Document Type and Number:
WIPO Patent Application WO/2019/136779
Kind Code:
A1
Abstract:
A three-way device for anti-backflow infusion and dosing, comprising a three-way valve body (1), the two ends of the three-way valve body (1) acting as liquid inlets, and an interface of the middle of the three-way valve body (1) acting as a liquid outlet; and a non-return mechanism is installed inside the three-way valve body (1). The non-return mechanism comprises a reverse-stop elastic tube (3) and a connecting piece (4), the connecting piece (4) being mounted with a sliding fit in the middle in the three-way valve body (1), the two ends of the connecting piece (4) respectively being connected to one end of the reverse-stop elastic tube (3), and the other end of each reverse-stop elastic tube (3) being closed, and abutting the inner end of a connecting base (2); A gap is left between the reverse-stop elastic tube (3) and the inner wall of the three-way valve body (1). Each liquid inlet of the three-way device can be connected to a syringe and, when a liquid drug is injected by any one syringe, an infusion path is automatically opened by means of compressing the closed end of the related reverse-stop elastic tube (3), without the need for any closing and opening operation, thereby preventing misoperation; leakage, overflow, and backflow will not occur when in use, ensuring the safety of the infusion and the bolus and aspiration administered during the infusion process.
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Inventors:
ZHANG JING (CN)
Application Number:
PCT/CN2018/074366
Publication Date:
July 18, 2019
Filing Date:
January 26, 2018
Export Citation:
Assignee:
SHANGHAI K&G INT CO LTD (CN)
International Classes:
A61M39/22; A61M39/24
Foreign References:
| US20070272311A1 | 2007-11-29 | |||
| US20050194047A1 | 2005-09-08 | |||
| CN2810646Y | 2006-08-30 | |||
| US6179806B1 | 2001-01-30 | |||
| US20080172006A1 | 2008-07-17 |
Other References:
See also references of EP 3741422A4
Attorney, Agent or Firm:
BEIJING YIGE INTELLECTUAL PROPERTY AGENT LTD (GENERAL PARTNERSHIP) (CN)
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