Process and device for delivery of fluid by chemical reaction
First Claim
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1. A device for delivering a fluid by chemical reaction, comprising:
- a reagent chamber containing at least one of a solvent and a reagent and having a plunger at an upper end and a one-way valve at a lower end, the one-way valve permitting exit of the at least one of the solvent and the reagent from the reagent chamber;
a reaction chamber having the one-way valve at an upper end and a piston at a lower end; and
a fluid chamber having the piston at an upper end, wherein the piston moves in response to pressure generated in the reaction chamber such that the volume of the reaction chamber increases and the volume of the fluid chamber decreases;
wherein the reaction chamber contains at least one of a dry powder reagent and a release agent.
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Abstract
Processes and devices for delivering a fluid by chemical reaction are disclosed. A chemical reaction is initiated in a reaction chamber to produce a gas, and the gas acts upon a piston to deliver the fluid. An exemplary device may include an upper chamber, a lower chamber, a fluid chamber, a piston between the lower chamber and the fluid chamber, and a one-way valve between the upper chamber and the lower chamber.
64 Citations
13 Claims
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1. A device for delivering a fluid by chemical reaction, comprising:
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a reagent chamber containing at least one of a solvent and a reagent and having a plunger at an upper end and a one-way valve at a lower end, the one-way valve permitting exit of the at least one of the solvent and the reagent from the reagent chamber; a reaction chamber having the one-way valve at an upper end and a piston at a lower end; and a fluid chamber having the piston at an upper end, wherein the piston moves in response to pressure generated in the reaction chamber such that the volume of the reaction chamber increases and the volume of the fluid chamber decreases; wherein the reaction chamber contains at least one of a dry powder reagent and a release agent. - View Dependent Claims (2, 3, 4)
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5. A device for delivering a fluid by chemical reaction, comprising:
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an upper chamber containing at least one of a solvent and a reagent and having a stationary one-way valve at a lower end, the one-way valve permitting exit of the at least one of the solvent and the reagent from the upper chamber; a plunger configured to travel through only the upper chamber; a lower chamber having the stationary one-way valve at an upper end and a piston at a lower end, the lower chamber containing at least one reagent; and a fluid chamber having the piston at an upper end; wherein a movement of the plunger towards the one-way valve causes the at least one of the solvent and the reagent to exit the upper chamber to initiate a gas-generating chemical reaction in the lower chamber, and the piston moves in response to pressure generated in the lower chamber such that the volume of the lower chamber increases and the volume of the fluid chamber decreases. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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Specification