Liquid delivery device particularly useful for delivering drugs
AssigneeSil Medics Ltd.
InventorsJoseph Gross, Shlomo Zucker
Life of this patent
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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.
Claims16
A liquid delivery device including:
- an outer housing having an outlet for a liquid to be delivered;
- a displaceable member within the housing defining a first contractible chamber on one side of the displacement member for holding a supply of the liquid to be delivered, and a second contractible chamber on an opposite side of the displaceable member in which a pressure is to be produced for controlling the displacement of the displacement member, and thereby the rate of flow of the liquid via said outlet;
- and pressure control means for controlling the pressure produced in said second contractible chamber;
- characterized in that said housing further includes:
- a second displaceable member defining a third contractible chamber between said housing and said first contractible chamber adjacent to said outlet;
- said third contractible chamber including compensating means for compensating the rate of flow of the liquid via said outlet in response to changes in temperature and pressure.
Dependencies are inferred from the claim text.