Device for dispensing a liquid particularly useful for deliverin

Details Device for dispensing a liquid particularly useful for deliverin Device for dispensing a liquid particularly useful for deliverin

1989-08-15

1991-11-05

Apley, Richard J.

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

604145, A61M 3700

Patent

active

050628348

ABSTRACT:
A device for dispensing a liquid, particularly a medicament, at a predetermined rate, includes a container including a displaceable partition to define a first expansible-contractible chamber on one side for receiving the liquid to be dispensed, and a second expansible-contractible chamber on the opposite side for receiving an electrolytic cell. The electrolytic cell has electrodes and an electrolyte capable of generating, upon the energization of the electrodes, a gas under pressure to thereby displace the displaceable partition and to force the liquid out from the first chamber in accordance with the rate of energization of the electrodes. The displaceable partition includes a piston assembly having a pair of pistons spaced apart by a connecting stem, the container being formed with a vent opening in the space between the pistons to prevent accidental mixing of the gas with the liquid to be dispensed.

REFERENCES:
patent: 3022785 (1962-10-01), Crockford et al.
patent: 3115280 (1963-12-01), Battista
patent: 3308818 (1967-03-01), Rutkowski
patent: 3433224 (1969-03-01), Black
patent: 3468308 (1969-09-01), Bierman
patent: 3640277 (1972-02-01), Adleberg
patent: 3871553 (1975-03-01), Steinberg
patent: 4351335 (1982-09-01), Whitney et al.
patent: 4561856 (1985-12-01), Cochran
patent: 4662872 (1987-05-01), Cane
patent: 4744786 (1988-05-01), Hooven

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