Patent ID: 8353426

Claim:
A method of dispensing a fluid comprising: generating a gas from a liquid; directing the gas to an expandable gas chamber to expand the expandable gas chamber, wherein expanding the expandable gas chamber comprises translating a first movable wall of the expandable gas chamber along a linear path, the first movable wall comprising a first mechanism to inhibit movement of the first movable wall in a backward direction along the linear path; reducing a volume of a fluid chamber in response to expansion of the expandable gas chamber to dispense an amount of the fluid from the fluid chamber; and removing the gas from the expandable gas chamber to collapse the expandable gas chamber, wherein collapsing the expandable gas chamber comprises drawing a second movable wall of the expandable gas chamber along the linear path toward the first movable wall, the second movable wall comprising a second mechanism to inhibit movement of the second movable wall in the backward direction along the linear path wherein removing the gas comprises converting the gas back into the liquid and storing the liquid in a liquid storage reserve.