초록 ▼

A safety shield system having a needle assembly with a safety shield movable from a first position enclosing an end of a needle cannula, to a second position exposing the end of the needle cannula for injection, to a third position lockingly enclosing the end of a needle cannula. The safety shield s

A safety shield system having a needle assembly with a safety shield movable from a first position enclosing an end of a needle cannula, to a second position exposing the end of the needle cannula for injection, to a third position lockingly enclosing the end of a needle cannula. The safety shield system permits retraction of the safety shield during use, but extends the shield enclosing the needle cannula in a locked position following use. The safety shield system also has a cap for receiving the needle assembly and lockingly enclosing another end of the needle cannula. Thus, both ends of a double-ended needle cannula are lockingly enclosed following use of the needle assembly of the inventive safety shield system.

대표청구항 ▼

What is claimed is: 1. A safety shield system comprising: a needle assembly comprising: a hub member; a needle cannula carried by said hub member and having sharpened first and second ends; a clip member on said hub member and having a plurality of resilient fingers; first shielding means having an

What is claimed is: 1. A safety shield system comprising: a needle assembly comprising: a hub member; a needle cannula carried by said hub member and having sharpened first and second ends; a clip member on said hub member and having a plurality of resilient fingers; first shielding means having an open end near said first end of said needle cannula, and a generally closed end near said second end of said cannula and having an aperture defined therethrough, said first shielding means being moveably arranged with respect to said hub member between a first position surrounding said needle cannula, a second position exposing a part of said needle cannula, and a third position lockingly surrounding said sharpened second end of said needle cannula; and means engaging said first shielding means for biasing said first shielding means toward said first and third positions; and second shielding means for lockingly receiving said open end of said first shielding means and enclosing said sharpened first end of said needle cannula. 2. A safety shield system as recited by claim 1, wherein said first shielding means comprises a generally tubular shield. 3. A safety shield system as recited by claim 1, wherein said second shielding means comprises a cap that lockingly receives said open end of said first shielding means. 4. A safety shield system comprising: a needle assembly comprising a hub member; a needle cannula carried by said hub member and having sharpened first and second ends; a clip member on said hub member and having a resilient finger; first shielding means having an open end near said first end of said needle cannula, and a generally closed end near said second end of said cannula and having an aperture defined therethrough, said first shielding means being moveably arranged with respect to said hub member between a first position surrounding said needle cannula, a second position exposing a part of said needle cannula, and a third position lockingly surrounding said sharpened second end of said needle cannula; means engaging said first shielding means for biasing said first shielding means toward said first and third positions; and second shielding means for lockingly receiving said open end of said first shielding means and enclosing said sharpened first end of said needle cannula; wherein said first shielding means further comprises means for lockingly engaging said resilient finger as said first shielding means is moved from said second position to said third position, and wherein said means for lockingly engaging said resilient finger comprises an opening defined in said first shielding means, said opening being sized and shaped such that said resilient finger passes over said opening as said first shielding means is moved from said first position to said second position, and so as to capture said resilient finger as said first shielding means is moved from said second position to said third position. 5. A safety shield system as recited by claim 4, wherein said clip member comprises a plurality of resilient fingers. 6. A safety shield system as recited by claim 5, wherein said first shielding means comprises a plurality of openings for lockingly engaging said plurality of resilient fingers. 7. A safety shield system as recited by claim 1, wherein said clip member includes a base integrally formed with said resilient fingers. 8. A safety shield system as recited by claim 1, wherein said means for biasing comprises a spring between said hub member and said first shielding means. 9. A safety shield system as recited by claim 1, wherein said second shielding means is sized and shaped to removably receive said generally closed end of said first shielding means, said safety shield system further comprising means for preventing movement of said first shielding means out of said first position when said generally closed end of said first shielding means is removably received by said second shielding means. 10. A safety shield system as recited by claim 9, wherein said means for preventing movement comprises a groove defined in said first shielding means and a rib defined on said second shielding means and disposed in said groove. 11. A safety shield system comprising: a needle assembly comprising: a hub member; a needle cannula carried by said hub member and having sharpened first and second ends; a clip member on said hub member and having a resilient finger; first shielding means having an open end near said first end of said needle cannula, and a generally closed end near said second end of said cannula and having an aperture defined therethrough, said first shielding means being moveably arranged with respect to said hub member between a first position surrounding said needle cannula, a second position exposing a part of said needle cannula, and a third position lockingly surrounding said sharpened second end of said needle cannula; means engaging said first shielding means for biasing said first shielding means toward said first and third positions; and second shielding means for lockingly receiving said open end of said first shielding means and enclosing said sharpened first end of said needle cannula; and means for preventing rotation between said hub member and said first shielding means, wherein said means for preventing rotation comprises a plurality of radially spaced grooves defined in said first shielding means and a plurality of radially spaced ribs defined on said hub member. 12. A safety shield system comprising: a needle assembly comprising: a hub member; a needle cannula carried by said hub member and having sharpened first and second ends; a clip member on said hub member and having a resilient finger; a tubular shield having an open end near said first end of said needle cannula, and a generally closed end near said second end of said needle cannula, said generally closed end having an aperture defined therethrough, said tubular shield being moveably arranged with respect to said hub member between a first position surrounding said needle cannula, a second position exposing a part of said needle cannula, and a third position lockingly surrounding said sharpened second end of said needle cannula; and a spring for biasing said tubular shield toward said first and third positions; and a first cap to lockingly receive said open end of said tubular shield to lockingly enclose said sharpened first end of said needle cannula, wherein said first cap is sized and shaped to removably receive said generally closed end of said tubular shield, and further comprising means for preventing movement of said tubular shield out of said first position when said generally closed end of said tubular shield is removably received by said first cap, wherein said means for preventing movement comprises a groove defined in said tubular shield and a rib defined on said first cap and disposed in said groove. 13. A safety shield system as recited by claim 12, wherein said tubular shield further comprises an opening defined in a sidewall for lockingly engaging said resilient finger as said tubular shield is moved from said second position to said third position. 14. An injection system comprising: a pen injector having means for receiving a needle assembly; a needle assembly removably securable to said pen injector and comprising: a hub member complementarily sized and shaped with said receiving means of said pen injector for removably securing said needle assembly to said pen injector; a needle cannula carried by said hub member and having sharpened first and second ends; a clip member on said hub member and having a resilient finger; first shielding means having an open end near said first end of said needle cannula, and a generally closed end near said second end of said cannula and having an aperture defined therethrough, said first shielding means being moveably arranged with respect to said hub member between a first position surrounding said needle cannula, a second position exposing a part of said needle cannula, and a third position lockingly surrounding said sharpened second end of said needle cannula; and means engaging said first shielding means for biasing said first shielding means toward said first and third positions; and second shielding means for lockingly receiving said open end of said first shielding means and enclosing said sharpened first end of said needle cannula after said needle assembly is removed from said pen injector.