Patent ID: 7887508
Filing Date: 2011-02-15
Classification: A61F,A61K,A61M,B81B,B81C,F04B,F16K,Y10T

Abstract:
1. An implantable electrolytic pump comprising: a drug chamber for containing a liquid to be administered; a cannula in fluid communication with the chamber; first and second electrodes and circuitry for activating the electrodes; and a flexible membrane disposed above the electrodes, the membrane comprising a series of radially-concentric corrugations facilitating (a) expansion of the membrane from a substantially flat configuration to an inflated configuration with increases in pressure and (b) contraction of the membrane from the inflated configuration to the substantially flat configuration with decreases in pressure, activation of the electrodes causing creation of a gas within the chamber to thereby expand the membrane so that liquid is forced from the chamber into the cannula.