LIQUID DELIVERY DEVICE PARTICULARLY USEFUL FOR DELIVERING DRUGS

摘要

A delivery device for delivering a liquid containing a drug includes a first diaphragm (8) within a housing (2) defining a first contractible-chamber (C1) on one side of the diaphragm (8) for holding a supply of the liquid to be delivered, and a second contractible chamber (C2) on the opposite side of the diaphragm (8) including an electrolytic cell (26) capable of generating a gas according to the electrical current passed through the cell electrolyte (32). The device further includes a second diaphragm (10), a control valve (18), and a spring (24), for compensating the rate of delivery of the liquid for variations in ambient pressure and temperature.