Safety syringe having a combination needle cannula and articulating hub for retracting said cannula into a medication carpule
April 13, 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 2671450 3848593 Self-aspirating syringe with frictionally engaged locking collet Hypodermic syringe cartridge with non-retractable drive piston Syringe apparatus with retractable needle Retractable disposable syringe Anti-stick contagion free disposable hypodermic safety syringe Cannula insertion set with safety retracting needle Retractable hypodermic safety syringe Patent #: 4790822 InventorsAssigneeApplicationNo. 181204 filed on 04/13/1988US Classes:604/110, Having means for preventing reuse of device604/195, Portion of body entering conduit stored in material receiving syringe reservoir604/232Material reservoir (e.g., cartridge, etc.) removably mounted in syringeExaminersPrimary: Rosenbaum, C. FredAssistant: Rafa, Michael Attorney, Agent or FirmInternational ClassA61M 005/00AbstractA safety syringe, such as a dental syringe, comprising a hollow cylinder, a disposable, prefilled fluid medication carpule received within the interior of the cylinder, and a needle carrying hub supporting a needle cannula so that the cannula extends axially from the carpule and outwardly of the cylinder, whereby to administer an injection. A piston assembly is movable axially through the carpule to first expulse the medication therefrom and to then engage and retract the needle hub and its associated needle cannula into the carpule, so that the needle will be completely surrounded and shielded by said carpule. A slide lock is connected around one end of the medication carpule and interfaced with the needle carrying hub to control the relocation of the hub and corresponding retraction of the cannula through the carpule. The slide lock is selectively moved relative to the carpule between needle retaining and needle releasing positions to either anchor the needle carrying hub with the needle extending axially from the carpule for administering an injection or release the needle carrying hub for retracting the cannula into its carpule to permit a safe disposal of the needle while avoiding an accidental and potentially life threatening needle strike.Field of SearchHaving means for preventing reuse of deviceHaving cover or protector for body entering conduit Portion of body entering conduit stored in material receiving syringe reservoir And extended therefrom by piston when syringe is used Common cover or protector for body entering conduit and material syringe reservoir Cover or protector for body entering conduit movable axially relative to one another Specific structure of means coupling piston to piston actuator Piston actuator contacting resilient retractable portion on piston Material reservoir (e.g., cartridge, etc.) removably mounted in syringe Material reservoir centered or clamped in syringe by slidable component Means for ejecting, or facilitating ejection of material reservoir from syringe | |
