Process and device for delivery of fluid by chemical reaction

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

• a barrel containing a first chamber, a second chamber, and a fluid chamber, the first chamber containing a first reagent and the second chamber containing a second reagent;
• a push button coupled to the barrel;
• a plunger separating the first chamber from the second chamber, wherein the plunger is operative to rotate relative to the barrel in response to an actuation of the push button to initiate a mixing of the first reagent and the second reagent;
• and
• a piston positioned between the second chamber and the fluid chamber, wherein the piston moves into the fluid chamber in response to a pressure generated in the second chamber following the mixing of the first reagent and the second reagent.

A method of delivering a fluid by chemical reaction, the method comprising:

• actuating a plunger positioned in a barrel of a device, the plunger separating a first chamber containing a first reagent from a second chamber containing a second reagent;
• and
• mixing the first reagent and the second reagent in response to the actuating to initiate a chemical reaction in the second chamber of the device, the second chamber including a piston,
• wherein the plunger moves axially and rotationally in response to the actuating,
• wherein a gas generated by the chemical reaction moves the piston into a fluid chamber containing the fluid to expel the fluid from the device.

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

• a barrel containing a first chamber, a second chamber, and a fluid chamber, the first chamber containing a liquid reagent, the second chamber containing a dry reagent, and the fluid chamber containing the fluid to be delivered, the second chamber being positioned axially between the first chamber and the fluid chamber;
• a push button coupled to an end of the barrel;
• a plunger separating the first chamber and the second chamber, the plunger including a sealing member configured to engage a sidewall in the second chamber;
• a piston positioned in the second chamber;
• and
• a spring positioned in the second chamber between the piston and the plunger,
• the device having a storage state and an operating state, wherein
• in the storage state the plunger blocks a mixing of the first reagent and the second reagent, and the spring is compressed against the plunger, and
• in the operating state the spring is operative to push the plunger into the first chamber in response to an actuation of the push button to allow mixing of the liquid reagent and the dry reagent to initiate a chemical reaction in the second chamber of the device, wherein a gas generated by the chemical reaction is operative to move the piston into the fluid chamber to force the fluid to exit the device.