Abstract: A transdermal drug delivery device includes a liquid reservoir for a liquid drug to be delivered, and a drug delivery body which includes a plurality of tubular elements extending through the body, each having an inlet end communicating with the liquid reservoir, and an outlet end engageable with the subject's skin to conduct the liquid drug directly to the subject's skin.

Abstract: A liquid material dispenser includes a housing formed with a reservoir for the liquid to be dispensed, an outlet through which the liquid is to be dispensed, and a connecting passageway between the reservoir and the outlet. A diaphgram is located in a cavity in the passageway such that one side of the diaphragm defines a pumping chamber, and the other side defines a control chamber. An electrolytic cell generates a gas to the control chamber according to the quantity of electrical current passed through the electrolyte, for driving the diaphragm through forward strokes to pump liquid to the outlet; and a slow-acting vent vents the gas from the control chamber to the atmosphere at a rate lower than that of generation of gas by the electrolytic cell, for driving the diaphragm through return strokes to refill the pumping chamber.

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