Drug Delivery Device with Electrically Controlled Volume Changing Means
First Claim
1. A drug delivery device comprising a drug reservoir chamber containing a substance to be delivered in fluid connection with a drug administration means, and a hydraulic control chamber containing an electrically controlled, volume changing means, wherein said volume-changing means comprises a battery comprising electrodes and an electrolyte, the battery being configured such that the combined volume of said electrodes and electrolyte changes upon the discharge thereof, a coupling means coupling said hydraulic control chamber to said drug chamber, the arrangement being such that a change in said combined volume during discharging of said battery is conveyed by said coupling means to said drug chamber such that said substance is expelled from said drug chamber towards said drug administration means.
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Accused Products
Abstract
The present invention provides a drug delivery device comprising a drug reservoir chamber (15) containing a substance (16) to be delivered in fluid connection with a drug administration means (17) and (18), and a hydraulic control chamber (9) containing an electrically controlled, non-gassing, volume changing means (13), a coupling means (14) coupling said hydraulic control chamber (9) to said drug chamber (15), the arrangement being such that a change in the electrical control means (11) causes a change in the volume of the volume changing means (13), the volume change being conveyed by the coupling means (14) to the drug chamber (15) such that the substance (16) is expelled from the drug chamber (15) towards the drug administration means (17) and (18).
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Citations
32 Claims
- 1. A drug delivery device comprising a drug reservoir chamber containing a substance to be delivered in fluid connection with a drug administration means, and a hydraulic control chamber containing an electrically controlled, volume changing means, wherein said volume-changing means comprises a battery comprising electrodes and an electrolyte, the battery being configured such that the combined volume of said electrodes and electrolyte changes upon the discharge thereof, a coupling means coupling said hydraulic control chamber to said drug chamber, the arrangement being such that a change in said combined volume during discharging of said battery is conveyed by said coupling means to said drug chamber such that said substance is expelled from said drug chamber towards said drug administration means.
Specification