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1. 发明专利

PH30619A Cartridge-needle unit having retractable needle 未知
公开(公告)号：PH30619A
公开(公告)日：1997-08-06
申请号：PH48955
申请日：1994-09-12
申请人： STERLING WINTRHOP INC
发明人： JOHNSON KEVIN M , O'DEA DENNIS J
IPC分类号： A61M5/178 , A61M5/24 , A61M5/31 , A61M5/32 , A61M5/50 , A61M5/145
摘要： This invention relates to a novel cartridge-needle unit having a retractable needle for use with disposable or reusable holders to form safety syringes.The cartridge-needle unit comprises a cartridge (10) comprising a hollow body (14), a septum (18) at the distal end of the body (14), means (16) for retaining the septum (18), and a plunger (20), axially and reciprocally slidable through the interior of the body (14); a needle (22) capable of being retracted within the cartridge (10); a hub (24) comprising a sleeve (26) adapted to be snapped on the distal end of the cartridge (10); means (28,30,32) for retaining the needle (22) within the hub (24) during an injection; and means (28,30) for releasing the needle (22) from the hub (24) after the injection comprising an element (30) attached to the needle (22), and having a diameter greater than said needle, capable of passing through the septum (18).The retractable cartridge-needle unit exhibits improved reliability, reduces the tendency for body fluids and/or medication to remain in an unprotected area upon retraction of the needle and virtually eliminates the possibility that the needle can be released into the patient.

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