Apparatus for the generation of gas pressure for controlled fluid delivery
First Claim
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1. An apparatus for delivering a fluid, comprising:
- a first compartment containing said fluid and having a fluid delivery outlet;
a second compartment in pressure-transferring communication with said first compartment such that gas pressure in said second compartment serves to pressurize said fluid in said first compartment;
a third compartment initially separately containing a solid and a liquid reactant, wherein said liquid reactant and said solid reactant generate a gas when combined together;
a wicking material adapted to carry said liquid reactant into contact with said solid reactant, wherein a first portion of said wicking material is in contact with said solid reactant and a second portion is adapted to contact said liquid reactant;
an openable barrier interposed between said wicking material and said liquid reactant such that upon opening said barrier, said liquid reactant contacts said second portion of wicking material, which in turn carries said liquid reactant into contact with said solid reactant, whereupon a gas is generated, pressurizing said fluid to deliver said fluid out of said outlet.
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Abstract
The present invention relates to apparatus and method for the controlled delivery of fluid. The apparatus comprises chemical reactants which combine to generate gas and create pressure to drive a fluid from a container. The reactants and the environment in which the reaction occurs are controlled, thereby causing the fluid to be delivered from the device at a predetermined flow rate.
288 Citations
43 Claims
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1. An apparatus for delivering a fluid, comprising:
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a first compartment containing said fluid and having a fluid delivery outlet; a second compartment in pressure-transferring communication with said first compartment such that gas pressure in said second compartment serves to pressurize said fluid in said first compartment; a third compartment initially separately containing a solid and a liquid reactant, wherein said liquid reactant and said solid reactant generate a gas when combined together; a wicking material adapted to carry said liquid reactant into contact with said solid reactant, wherein a first portion of said wicking material is in contact with said solid reactant and a second portion is adapted to contact said liquid reactant; an openable barrier interposed between said wicking material and said liquid reactant such that upon opening said barrier, said liquid reactant contacts said second portion of wicking material, which in turn carries said liquid reactant into contact with said solid reactant, whereupon a gas is generated, pressurizing said fluid to deliver said fluid out of said outlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for the generation of a gas used to deliver fluid, comprising:
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a first compartment containing a solid reactant in contact with a porous material; a second compartment containing a liquid reactant that is reactive with said solid chemical to form a gas; an openable barrier separating said first compartment from said second compartment such that upon opening said barrier, said liquid reactant contacts said porous material which in turn carries said liquid reactant into contact with said solid reactant, whereupon said gas is generated; and an outlet in said first or second compartment for directing said gas. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A device for the controlled delivery of fluid, comprising:
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a fluid impermeable casing containing the fluid and having an outlet disposed within the casing which allows passage of the fluid out of the casing; a flexible membrane disposed within the casing and dividing the casing into a liquid reservoir and a gas expansion reservoir; a gas generating chamber in fluid communication with the gas expansion reservoir; a solid reactant in contact with a porous material and a liquid reactant, said reactants being initially separately disposed in said gas generating chamber, and being reactive with each other such that they generate gas upon contact; and an openable barrier initially separating said solid and liquid reactants. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38)
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39. An apparatus for the generation of carbon dioxide gas used to deliver fluid from a container, comprising:
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a first compartment containing said fluid and having a fluid delivery outlet; a second compartment containing sodium carbonate in contact with a porous material adapted to bring a solution of citric acid into contact with said sodium carbonate whereupon carbon dioxide gas is generated; a third compartment containing said solution of citric acid; an openable barrier separating said first compartment from said second compartment; and an outlet for directing said carbon dioxide gas. - View Dependent Claims (40, 41, 42, 43)
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Specification