Process and device for delivery of fluid by chemical reaction

A device for delivering a fluid by chemical reaction, comprising:

• a barrel containing a reagent chamber, a reaction chamber, and a fluid chamber;
• wherein the reagent chamber is located within a push button member at a top end of the barrel;
• a plunger separating the reagent chamber from the reaction chamber;
• a spring biased to push the plunger into the reagent chamber when the push button member is depressed;
• and
• a piston separating the reaction chamber from the fluid chamber, wherein the piston moves in response to pressure generated in the reaction chamber.

A device for delivering a fluid by chemical reaction, the device comprising:

• a first chamber containing a first reagent;
• a second chamber containing a second reagent;
• a push button forming at least a portion of the first chamber;
• a plunger positioned between the first chamber and the second chamber;
• a piston positioned in the second chamber;
• and
• a biasing member positioned in the second chamber between the piston and the plunger,
• the device having a first state and a second state, wherein in the first state the plunger blocks mixing of the first reagent and the second reagent, and in the second state the biasing member biases the plunger into the first chamber in response to a depression of the push button to allow mixing of the first reagent and the second reagent to initiate a gas-generating chemical reaction in the second chamber of the device operative to move the piston, wherein the movement of the piston forces the fluid to exit the device.