发明名称 |
AUTOMATIC INJECTION AND RETRACTION SYRINGE |
摘要 |
<p>An automatic injection and retraction syringe having a medicine cartridge, an injection assembly, and a retraction assembly is provided. The retraction assembly is selectively securable to the injection assembly to house the medicine cartridge. The retraction assembly includes an end cap, a hypodermic needle, a retraction spring, and an upper seal. The retraction spring is maintained in a partially compressed condition between the needle hub and the end cap. The upper seal is urged against a sealing surface by the retraction spring in the partially compressed condition to form a hermetic seal. In some embodiments, the injection assembly includes an injection spring, a plunger engaged to the injection spring, and a safety element to prevent the plunger from escaping the injection assembly if the injection spring is released from the normally stressed condition before the assemblies are secured to one another.</p> |
申请公布号 |
WO2006063124(A3) |
申请公布日期 |
2007.08.23 |
申请号 |
WO2005US44411 |
申请日期 |
2005.12.08 |
申请人 |
WEST PHARMACEUTICAL SERVICES, INC.;GILLESPIE, RICHARD, DAVID;CROW, DOUG, OWEN |
发明人 |
GILLESPIE, RICHARD, DAVID;CROW, DOUG, OWEN |
分类号 |
A61M5/20 |
主分类号 |
A61M5/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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