Single-use safety syringe
Patent 5049133 Issued on September 17, 1991. Estimated Expiration Date: 
January 23, 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 23, 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 3848579 One-time use medical syringe invention Single use disposable hypodermic syringe Safe needle system for collecting fluids Retractable needle syringe Microcapsules having polyurethane walls Hypodermic syringe with retractable needle Patent #: 4955870 InventorApplicationNo. 468735 filed on 01/23/1990US Classes:604/110, Having means for preventing reuse of device604/198, Cover or protector for body entering conduit movable axially relative to one another604/240Specific structure of means connecting body entering conduit to syringeExaminersPrimary: Pellegrino, Stephen C.Assistant: Rafa, Michael Attorney, Agent or FirmForeign Patent References
International ClassA61M 005/00Foreign Application Priority Data1989-01-24 ESAbstractThe present invention relates to a safety-syringe providing a needle with a hollow core having a spring coiled around the needle. The spring is capable of expanding to retract the needle into the body of the syringe. A pressure hinge is provided with a plurality of teeth-shaped triggers for retaining the needle in a position for use and for preventing the piston from moving after use. Further, a vacuum may be provided within the piston for facilitating in the retraction of the needle into the syringe.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 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 connecting body entering conduit to syringe | |
