Two compartment mixing syringe
Patent 4693706 Issued on September 15, 1987. Estimated Expiration Date: 
August 11, 2006. 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.
August 11, 2006. 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 2619087 2724385 3255752 3340873 3354882 3739947 Prefilled two-compartment syringe Syringe assembly Patent #: 4412836 InventorAssigneeApplicationNo. 06/895237 filed on 08/11/1986US Classes:604/87, Means broken, cut, pierced or torn to permit mixing604/220Means for preventing accidental displacement of pistonExaminersPrimary: Truluck, Dalton L.Attorney, Agent or FirmInternational ClassesA61M 5/315 (20060101)B65D 81/32 (20060101) AbstractA mixing syringe having an inner cylindrical barrel open at one end, and closed at its other end by a thin, tough, membrane bonded thereto. The barrel may contain a first liquid. A plunger inserted in the barrel has a sliding, sealing head which applies pressure to the liquid to rupture the membrane when the plunger is advanced. The barrel is slidably inserted in an open end of an outer barrel in sealing relationship therewith, and has a tip on the other end of the outer barrel. The outer barrel contains a liquid or other material to mix with the first liquid when the membrane is ruptured. The mixture is discharged from the outer barrel via the tip when the inner barrel is advanced axially in the outer barrel.Field of SearchMeans for intermixing liquid with solid or different liquidMeans broken, cut, pierced or torn to permit mixing Septum Closure or barrier between compartments moved to permit mixing Closure moved, expanded, or flexed by force transmitted by liquid Having plural material reservoirs With piston or plunger for expelling material from body or injector reservoir Means for preventing accidental displacement of piston Seal ring mounted on piston | |
