Importance

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Abstract

A device for dispensing a liquid, particularly a medicament, at a predetermined rate, includes a container including a displaceable partition to define a first expansible-contractible chamber on one side for receiving the liquid to be dispensed, and a second expansible-contractible chamber on the opposite side for receiving an electrolytic cell. The electrolytic cell has electrodes and an electrolyte capable of generating, upon the energization of the electrodes, a gas under pressure to thereby displace the displaceable partition and to force the liquid out from the first chamber in accordance with the rate of energization of the electrodes. The displaceable partition includes a piston assembly having a pair of pistons spaced apart by a connecting stem, the container being formed with a vent opening in the space between the pistons to prevent accidental mixing of the gas with the liquid to be dispensed.

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First Claim