Title:
RETRACTABLE SAFETY SYRINGE HAVING REPLACEABLE NEEDLE
Document Type and Number:
WIPO Patent Application WO/2019/134381
Kind Code:
A1
Abstract:
A retractable safety syringe having a replaceable needle, comprising an outer casing (1), a pushing cylinder (2), a tapered seat (3), an irregularly-shaped liquid-proof ring (4), a slider (5), a spring (6), a rear plug (7) and a piston ring (8); scientific physical data is used in the design to improve the locking, interference and disengagement structures of each part of the retractable safety syringe having a replaceable needle so that the needle may be replaced, and the needle may retract into the pushing cylinder (2), the needle not being exposed after use; a fully automatic device is produced after improvement, and product quality is guaranteed while production costs are reduced, the structure thereof being novel.
Inventors:
YANG DEYI (CN)
Application Number:
PCT/CN2018/104158
Publication Date:
July 11, 2019
Filing Date:
September 05, 2018
Export Citation:
Assignee:
SHANTOU WEALY MEDICAL INSTR CO LTD (CN)
International Classes:
A61M5/178
Domestic Patent References:
| WO2002011796A1 | 2002-02-14 |
Foreign References:
| CN2817873Y | 2006-09-20 | |||
| CN200980874Y | 2007-11-28 | |||
| US6379336B1 | 2002-04-30 | |||
| US5211628A | 1993-05-18 | |||
| US20040215150A1 | 2004-10-28 |
Attorney, Agent or Firm:
SHENZHEN KAIDA PARTNERS INTELLECTUAL PROPERTY LAW FIRM (CN)
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