Syringe
Patent 5032114 Issued on July 16, 1991. Estimated Expiration Date: 
May 16, 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.
May 16, 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 ReferencesDisposable syringe Non-reusable syringe Safety syringe Single-use fillable syringe Self-destructive non-reusable injection syringe Syringe for one sole use Patent #: 4950243 InventorApplicationNo. 488020 filed on 05/16/1990US Classes:604/110, Having means for preventing reuse of device604/228Specific structure of means coupling piston to piston actuatorExaminersPrimary: Yasko, John D.Attorney, Agent or FirmForeign Patent References
International ClassA61M 005/00Foreign Application Priority Data1987-11-25 SEAbstractThe invention relates to a syringe (1) comprising a container (2), a needle (3) capable of co-acting with one end of the container, a plunger (4) which is arranged in the container and which sealingly co-acts with the inner surface (2c) thereof, and a rod-shaped element (5) which co-acts with the plunger (4) and which is arranged for reciprocating movement relative to the container (2), such that movement of the element from the one end (2a) in a first direction (P1) enables the container (2) to be filled with injection liquid, while linear movement in the opposite direction (P2) causes liquid in the container to be discharged therefrom through the needle (3). Provided between the plunger (4) and the element (5), for their mutual co-action, is a crewsthreaded means (6) which holds the plunger (4) firmly to the rod-shaped element (5) when the element moves in the first direction (P1) but which adopts an inactive state when the element (5) is moved in the opposite direction, therewith rendering refilling of the container impossible.Field of SearchHaving means for preventing reuse of deviceInjector or aspirator syringe supported only by person during use (e.g., hand held hypodermic syringe, douche tube with forced injection, etc.) With piston or plunger for expelling material from body or injector reservoir Specific structure of means coupling piston to piston actuator Including means for controlling piston stroke length By rotatable means (e.g., micrometer, etc.) | |
