Implantable medication dispensing device
Patent 5366454 Issued on November 22, 1994. Estimated Expiration Date: 
March 17, 2013. 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.
March 17, 2013. 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 3692027 Intravascular ultrasonic catheter/probe and method for treating intravascular blockage Ultrasonically enhanced RF ablation catheter Implantable drug delivery system with piston actuation Releasable coatings on balloon catheters Skin electrode construction and transdermal drug delivery device utilizing same Patent #: 5156591 InventorsAssigneeApplicationNo. 032991 filed on 03/17/1993US Classes:604/890.1, CONTROLLED RELEASE THERAPEUTIC DEVICE OR SYSTEM137/68.19, Rupture disc222/541.1, WITH FRANGIBLE CLOSURE FOR OUTLET222/541.2, With cutting or punching or with cutter or puncher accommodating means222/541.6, About line or point of weakness604/66, Sensor responsive to body condition604/88, Septum604/244, Means broken, cut, pierced, or torn to permit material flow to body604/246, Means for controlling material flow to or from body, or metering a predetermined dose or amount604/891.1Implanted dynamic device or systemExaminersPrimary: Rosenbaum, C. FredAssistant: Bockelman, Mark Attorney, Agent or FirmForeign Patent References
International ClassesA61K 009/11A61M 037/00 B65D 047/10 AbstractA medication dispensing device for implantation into an animal or human body, comprises a plurality of compartments each containing a dose of medicine to be dispensed and having a delivery opening permitting delivery of the medicine; a rupturable membrane sealing the delivery opening of each compartment, the membrane having a predetermined elastic deformation limit and a predetermined rupture point; and a membrane rupturing system associated with each compartment for rupturing the membrane thereof in response to an electrical signal. The membrane rupturing system includes a stress-inducing member maintaining the membrane stressed to substantially the elastic deformation limit thereof, and a piezoelectric transducer responsive to the electrical signal for applying to the membrane additional stress sufficient to exceed the rupture point of the membrane, thereby causing the membrane to rupture and allowing body fluids to enter into the compartment for mixing with the medicine contained therein so that the medicine is released in admixture with the body fluids through the delivery opening into the animal or human body. The medication dispensing device of the invention further comprises a control circuit connected to a power source for supplying the electrical signal to a respective piezoelectric transducer of each membrane rupturing system to activate the respective piezoelectric transducer.Other References
Field of SearchWith means for cutting, scarifying, or vibrating (e.g., ultrasonic, etc.) tissueMeans broken, cut, pierced, or torn to permit material flow to body Means for controlling material flow to or from body, or metering a predetermined dose or amount Septum Means for intermixing liquid with solid or different liquid Deformable resilient chamber type CONTROLLED RELEASE THERAPEUTIC DEVICE OR SYSTEM Implanted dynamic device or system | |
