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US 5,398,850 AGranted
Gas delivery apparatus for infusion
AssigneeRiver Medical, Inc.
InventorsGregory E. Sancoff, Mark C. Doyle, Frederic P. Field
Life of this patent
Estimating the term…
Abstract
An apparatus for dispensing a fluid, comprising a container for holding the fluid to be dispensed and a housing for holding a solid chemical and a liquid chemical which react to generate carbon dioxide gas upon contact, such that the gas is used to drive the fluid out of the container.
Claims16
An apparatus for dispensing a fluid from a container comprising:
- a container for holding a fluid to be dispensed;
- means for generating a propellant gas comprising:
- an alkalai metal carbonate formed into a solid mass, a liquid chemical that is reactive with said carbonate to form a carbon dioxide propellant gas, a substantially closed housing enclosing separately said carbonate and said liquid chemical and having an outer wall being in fluid communication with said container, and means for combining said carbonate and said liquid chemical to form said carbon dioxide propellant gas;
- and
- means for housing said container and said gas generating means, said container being in fluid communication with said gas generating means whereby the propellant gas escaping from said substantially closed housing pushes said fluid from said container out of said housing means.
2 more elements
An apparatus for dispensing a fluid from a container comprising:
- a container for holding a fluid to be dispensed;
- means for generating a propellant gas comprising:
- an alkalai metal carbonate formed into a solid mass, a liquid chemical that is reactive with said carbonate to form a carbon dioxide propellant gas, a hydrophobic membrane surrounding and enclosing said carbonate and said liquid chemical and having an outer surface being in fluid communication with said container, and means for combining said carbonate and said liquid chemical to form said carbon dioxide propellant gas;
- and
- means for housing said container and said gas generating means, said container being in fluid communication with said gas generating means whereby the propellant gas escaping from said hydrophobic membrane pushes said fluid from said container out of said housing means.
2 more elements
Dependencies are inferred from the claim text.