Gas cell driven fluid delivery device for spill-resistant storage and use

An orientation independent delivery device comprising:

• a foundation and a removable cartridge, the foundation being configured for disposition in association with a surface of a local environment and for removable coupling to the cartridge to permit replacement of the cartridge with a replacement cartridge;
• a retention mechanism to hold the cartridge in installed registration with respect to the foundation and to permit removal of the cartridge from the foundation for replacement of the cartridge with a replacement cartridge;
• the cartridge comprising:
• a gas chamber comprising a gas-side rigid portion and a gas-side flexible barrier element, wherein the gas-side flexible barrier element is permanently sealed, around a first perimeter of the gas chamber, to the gas-side rigid portion such that gas introduced to the gas chamber is confined between the gas-side flexible barrier element and the gas-side rigid portion;
• a delivery chamber comprising a delivery-side rigid portion and a delivery-side flexible barrier element, wherein the delivery-side flexible barrier element is permanently sealed, around a second perimeter of the delivery chamber, to the delivery-side rigid portion such that delivery material introduced to the delivery chamber is confined between the delivery-side flexible barrier element and the delivery-side rigid portion, the delivery-side flexible barrier element being oriented adjacent to, and a distinct element from, the gas-side flexible barrier element;
• with
• a self-powered gas cell coupled to the gas-side rigid portion of the gas chamber, the gas cell to increase a gas pressure within the gas chamber to expand the gas-side flexible barrier element, wherein expansion of the gas-side flexible barrier element applies a compressive force to the delivery-side flexible barrier element;
• and
• a delivery aperture to allow a delivery material to escape from the delivery chamber in response to deflection of the delivery-side flexible barrier element in a direction toward the delivery-side rigid portion;
• the delivery device further comprising:
• means to resist unintended discharge of delivery material from the apparatus to the environment due to change in temperature of the cartridge or as a result of passive gas generation during long-term storage of the cartridge, wherein the means to resist unintended discharge comprises structure forming a vent for passive gas, the vent being configured to resist build-up of pressure in the gas chamber and caused by passive gas released from the gas cell.