Device for delivering a pharmacologically active principle by electrolytic pumping

A device for delivering a pharmacologically active principle by electrolytic pumping, the device including an electrolysis cell (C) comprising:

• a closed variable volume first chamber (2) containing a liquid electrolyte that gives off gas under the effect of an electrolysis voltage applied to a pair of electrodes (3, 4) in contact with the electrolyte, the gas given off causing the first chamber to expand;
• and
• a variable volume second chamber (7), said second chamber opening out to the outside of said second chamber via an orifice (11) enabling the active principle to be delivered;
• the total volume of the two chambers (2, 7) being constant, such that expansion of the first chamber causes the volume of the second chamber to be reduced and gives rise to a corresponding controlled expulsion of the active principle contained therein;
• the two chambers (2, 7) are separated from each other by a flexible wall (6) uniformly subjected to the pressure resulting from the gas being given off in such a manner as to reduce the volume of the second chamber (7) and expel the active principle;
• and
• the first chamber (2) contains the liquid electrolyte in which the pair of electrodes (3, 4) that extend over a major portion of the length of said first chamber are immersed in said liquid electrolyte so that the pair of electrodes are always at least in part in contact with the liquid electrolyte regardless of the position of the device.