Combination retractable needle cannula and cannula lock for a medication carpule
Patent 4909794 Issued on March 20, 1990. Estimated Expiration Date: 
June 24, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 24, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1526824 2855927 3367331 Adapter assembly Carpule syringe with rapidly acting mechanism for controllably _positively retaining the hub of a hypodermic needle Disposable safety syringe having means for retracting its needle cannula into its medication cartridge Patent #: 4808169 InventorsAssigneeApplicationNo. 211366 filed on 06/24/1988US Classes:604/195, Portion of body entering conduit stored in material receiving syringe reservoir604/110, Having means for preventing reuse of device604/232Material reservoir (e.g., cartridge, etc.) removably mounted in syringeExaminersPrimary: Yasko, John D.Attorney, Agent or FirmInternational ClassA61M 005/32AbstractA combination retractable needle cannula and cannula lock which is to be interfaced with a prefilled medication carpule at the interior of a hypodermic syringe. The cannula lock includes a clamp having a pair of oppositely disposed jaws which are normally separated from one another so that the needle cannula can be releasably retained therebetween. In the preinjection state, the clamp is axially spaced from the carpule, and the jaws of the clamp are rotated towards one another to retain the cannula in an axially extended position for administering an injection. In the post-injection state, after the contents of the carpule have been expulsed via the cannula, the clamp is engaged and displaced by the carpule, whereby the jaws of the clamp rotate away from one another to release the cannula. The cannula may then be retracted within and completely surrounded by the empty carpule so that the cannula can be safely discarded after use while avoiding an accidental needle stick and the spread of a contagious, and possibly life threatening, disease.Field of SearchMaterial reservoir (e.g., cartridge, etc.) removably mounted in syringePortion of body entering conduit stored in material receiving syringe reservoir Means broken, cut, pierced, or torn to permit material flow to or from body Septum pierced by conduit to permit flow Septum pierced is piston head Specific structure of means connecting body entering conduit to syringe Conduit holder attached to another injector component by cam Conduit or holder therefor removably attached to another injector component by friction Conduit holder attached to another syringe component by thread means Having means for preventing reuse of device | |
