Title:
NEW SAFE LATCHING TYPE SELF-DESTROYING SYRINGE
Document Type and Number:
WIPO Patent Application WO/2009/140801
Kind Code:
A1
Abstract:
A latching type self-destroying syringe includes a hollow barrel (1), a plunger-rod (2) sliding in the barrel (1), and a piston (3) which is installed on the front end of the plunger-rod (2). There is a needle holder (4) installed on the front end of the barrel (1), a round board (14) provided on the plunger-rod (2), and elastic pawls (15) provided on the round board (14), beveled angularly extending to the wall of the barrel (1). A diameter-increasing part (6) is provided at the tail end of the barrel (1), and an inclined step (8) is provided at the transition between the diameter non-increasing part (7) and the diameter-increasing part (6) of the barrel (1). The inclined step (8) is provided with a groove (9) at its underside, and the elastic pawls (15) can be locked in the groove (9), when pulling the plunger-rod (2) downward. A retainer ring (10) which can retain the bottom of the round board (14) is provided in the diameter-increasing part (6).
Inventors:
LIN ZUOQIAN (CN)
Application Number:
PCT/CN2008/001309
Publication Date:
November 26, 2009
Filing Date:
July 14, 2008
Export Citation:
Assignee:
LIN ZUOQIAN (CN)
International Classes:
A61M5/178; A61M5/50; A61M5/315
Domestic Patent References:
| WO2002032485A1 | 2002-04-25 |
Foreign References:
| CN101347648A | 2009-01-21 | |||
| CN1803212A | 2006-07-19 | |||
| CN2820208Y | 2006-09-27 | |||
| CN2860502Y | 2007-01-24 | |||
| US3890971A | 1975-06-24 | |||
| US5222942A | 1993-06-29 | |||
| US4978339A | 1990-12-18 |
Other References:
See also references of EP 2279771A4
Attorney, Agent or Firm:
ZHEJIANG HANGZHOU JINTONG PATENT AGENCY CO. LTD (Hongying19f, Kexie Building,No. 47, Huancheng North Road,Hangzhou, Zhejiang 3, CN)
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