Pre-filled safety syringe having a retractable needle
July 15, 2014. 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 2879766 Blood sampling and culturing kit Blood extracting and centrifuging device Disposable safety syringe having means for retracting its needle cannula into its medication cartridge Disposable safety syringe having a retractable needle cannula and cannula lock Combination retractable needle cannula and cannula lock for a medication carpule Safety syringe having a combination needle cannula and articulating hub for retracting said cannula into a medication carpule Syringe Safety module-activator reshielding tool Disposable safety syringe InventorsAssigneeApplicationNo. 275955 filed on 07/15/1994US Classes:604/110, Having means for preventing reuse of device604/195Portion of body entering conduit stored in material receiving syringe reservoirExaminersPrimary: Yasko, John D.Assistant: Cermak, Adam J. Attorney, Agent or FirmInternational ClassesA61M 005/50A61M 005/32 AbstractThe syringe of the present invention is ideally supplied to the user in a pre-filled state, with the piston stem protruding from the syringe body and with the cannula covered with a protective cover. Once the disposable safety syringe of the present invention is unwrapped, it may be used for performing an injection in the usual way. As the last bit of fluid is injected through the cannula, the piston engages the proximal portion of the needle axial translating structure. The piston stem is then withdrawn back through the syringe body, pulling the cannula inside the syringe body. The piston is prevented from exiting the syringe body because of the presence of a flange at the proximal end of the syringe. The piston stem is then quickly removable from the piston by disengaging the large-pitch thread with which it was attached to the piston, which eliminates the possibility of inadvertent proximal motion of the piston.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 Specific structure of means coupling piston to piston actuator Removable cover or protector for body inserted conduit | |
