Patent ID: 8308686

Claim:
An implantable electrolytic pump comprising: a first exterior surface shaped to fit on the curved contour of an eyeball; a drug chamber for containing a liquid to be administered; a refill port resealably puncturable by a needle to facilitate refilling of the drug chamber; a cannula in fluid communication with the chamber, an end of the cannula being shaped to facilitate insertion thereof into the eyeball; first and second electrodes; and a membrane disposed above the electrodes, the membrane being configured to expand and contract with increases and 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, wherein (i) the first electrode includes at least one central elongate portion and a plurality of elongations extending from the at least one central elongate portion, and (ii) the second electrode at least partially encircles the first electrode.