Multi-chamber vial
Patent 5114411 Issued on May 19, 1992. Estimated Expiration Date: 
November 19, 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.
November 19, 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 Re29656 2665690 3314563 3563415 3696919 3809225 3856138 3923059 Two-chamber mixing syringe Disposable additive syringe InventorsAssigneeApplicationNo. 615610 filed on 11/19/1990US Classes:604/203, Septum pierced is piston head604/87Means broken, cut, pierced or torn to permit mixingExaminersPrimary: Rosenbaum, C. FredAssistant: Finkel, Sharon Attorney, Agent or FirmForeign Patent References
International ClassesA61M 005/24A61M 037/00 AbstractA vial (2) has first and second chambers (56, 54) initially separated by a rupturable barrier (20). The first chamber is a variable volume chamber defined by a cylinder (18), the rupturable barrier at the second end (19) of the cylinder and a piston (14). The second chamber is created by a telescoping container (22) mounted to a second end of the cylinder. The chambers are telescopically collapsed causing fluid pressure in the second chamber to rupture the barrier so the components mix in the first chamber. The piston is driven through the cylinder from pre-mix to post-mix positions by the liquid from the second chamber. This dislodges a safety shield at the first end of the cylinder to expose the piston. The mixed contents of the first, variable volume chamber are removed by inserting a needle cannula through the now exposed piston; aspiration of the mixed contents take place without the introduction of air into the first chamber since the piston moves back down the cylinder as the contents are removed. A spike adapter can be used to transfer the contents of the vial to a conventional IV bag.Other References
Field of SearchHaving plural material reservoirsSeptum pierced by conduit to permit flow Septum pierced is piston head Septum within collapsible material reservoir Specific structure of body entering or piercing conduit Having hollow needle or spike for piercing container or container clossure Conduit with hollow needle or spike at each end thereof Pointed at both ends Mounted on one container and used to pierce another container or closure Container with piercable closure Materials mixed within container Means for intermixing liquid with solid or different liquid Means broken, cut, pierced or torn to permit mixing Septum pierced by conduit Septum Closure or barrier between compartments moved to permit mixing Closure moved, expanded, or flexed by force transmitted by liquid Closure moved by relative movement between closure and separate protruding member | |
