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专利权人:

Isidoro;Mazzara

发明人:

MAZZARA, ISIDORO

申请号：

PL05812866

公开号：

PL1824540T3

申请日:

2005.11.24

申请国别(地区):

PL

年份:

2013

代理人:

摘要：

The invention relates to a perfected retractable needle safety syringe comprising a hollow cylinder, a needle holder, a needle and a piston with an operating stem, said stem exhibiting an axial hole wherein there are seated a retraction pre-loaded spring and an extractor element. The extractor element exhibits a recess or seat intended for interacting with the needle holder, and at the side opposite the needle holder, a projection or annular rib.

来源网站：

中国工程科技知识中心

来源网址：

http://www.ckcest.cn/home/