Retractable needle system
Patent 5188599 Issued on February 23, 1993. Estimated Expiration Date: 
February 15, 2011. 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.
February 15, 2011. 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 2752918 Blood drawing apparatus Safety hypodermic syringe Single-use safety syringe Safety syringe with retractable needle Disposable hypodermic syringe Patent #: 5064419 InventorsAssigneeApplicationNo. 656305 filed on 02/15/1991US Classes:604/110, Having means for preventing reuse of device604/198, Cover or protector for body entering conduit movable axially relative to one another604/232Material reservoir (e.g., cartridge, etc.) removably mounted in syringeExaminersPrimary: Rosenbaum, C. FredAssistant: Maglione, C. Attorney, Agent or FirmInternational ClassA61M 005/24AbstractA hypodermic injection system (7) with a retractable needle (9) wherein the needle (9) retracts within an interior cavity (71) of a syringe plunger (59), such that the needle (9) is confinedly held within the plunger (59). A cylindrical spring housing (21) has resilient fingers (23) which captures a spring (15) biasly holding a needle holder (11) against the retaining force of resilient fingers (23). The plunger (59) has a frangible end (65), which dissociates when the outwardly tapered shoulders (68) spread the resilient fingers (23), allowing the coiled spring (15) to eject the needle (9) and its holder (11) into the interior cavity (71) of the syringe plunger (59). A body fluid sampling embodiment employs the same functional elements except the plunger (59") is shorter and contains a linking needle (137) that communicates with a vacuum container (147). The container allows fluid sampling and provides the structure to release the spring (15") retracting the needle (9").Field of SearchHaving means for preventing reuse of deviceHaving cover or protector for body entering conduit Entire body entering conduit stored in cavity in piston or piston actuator inside syringe prior to use Portion of body entering conduit stored in material receiving syringe reservoir 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 Means for preventing accidental displacement of piston Closable storage cavity included in piston or piston actuator Specific structure of finger grip for moving piston Material passed to or from body through aperture in piston Material reservoir (e.g., cartridge, etc.) removably mounted in syringe Specific structure of means connecting body entering conduit to syringe | |
