Disposable hypodermic syringe
Patent 5064419 Issued on November 12, 1991. Estimated Expiration Date: 
January 11, 2010. 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.
January 11, 2010. 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 2512882 3314428 3890971 Syringe for use in hypodermic biopsy, featuring automatic plunger-return Medical syringe Cannula insertion set with safety retracting needle Injection devices Disease control syringe having a retractable needle Safe needle system for collecting fluids Retractable needle syringe InventorApplicationNo. 458637 filed on 01/11/1990US Classes:604/195, Portion of body entering conduit stored in material receiving syringe reservoir128/919, Syringe, means to protect user604/110, Having means for preventing reuse of device604/198, Cover or protector for body entering conduit movable axially relative to one another604/218With piston or plunger for expelling material from body or injector reservoirExaminersPrimary: Rosenbaum, C. FredAssistant: Polutta, Mark O. Attorney, Agent or FirmForeign Patent References
International ClassA61M 005/00Foreign Application Priority Data1987-07-13 DKAbstractDisposable hypodermic syringe comprising a needle (1) which can be retracted and held inside the syringe which moreover comprises a syringe barrel (4, 5) with liquid chamber designed with a piston (14) with a piston rod (7). Opposite the piston (14) the liquid chamber has an entirely or partially yielding end wall (6) with an opening, and the needle (1) is in its end area opposite its point provided with a head (3) which is subjected to the pressure of a spring in the direction toward the yielding wall (6). The piston (14) has a projection with locking means (10) designed to interlock with the opening in the yielding wall (6) when the piston bottoms in that the needle simultaneously snaps into a cavity (9) in the piston through the opening in the yielding wall (6); further usage of the syringe is hereby prevented.Field of SearchHaving means for preventing reuse of deviceEntire 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 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 Portion of conduit stored in material supply means Material supply means pierced by conduit Specific structure of means connecting body entering conduit to syringe With piston or plunger for expelling material from body or injector reservoir | |
