초록 ▼

Gas is generated at a controlled rate from a liquid and solid phase combination that generated gas upon contact, by using diffusive transport of the liquid toward the solid phase surface to prolong the rate of gas generation, with a variety of alternatives for controlling the rate of diffusive trans

Gas is generated at a controlled rate from a liquid and solid phase combination that generated gas upon contact, by using diffusive transport of the liquid toward the solid phase surface to prolong the rate of gas generation, with a variety of alternatives for controlling the rate of diffusive transport. This system is useful in infusion devices for delivering medications or other beneficial liquids from a retaining pouch at controlled rates over a prolonged period of time.

대표청구항 ▼

[ We claim:] [1.] An article of manufacture comprising:a solid substance;a liquid-retaining receptacle for retaining a liquid substance which upon contact with said solid substance generates a gaseous product, said liquid-retaining receptacle permitting contact of said liquid substance with said sol

[ We claim:] [1.] An article of manufacture comprising:a solid substance;a liquid-retaining receptacle for retaining a liquid substance which upon contact with said solid substance generates a gaseous product, said liquid-retaining receptacle permitting contact of said liquid substance with said solid substance through diffusive transport of said liquid substance, said solid substance being external of said liquid-retaining receptacle and separated from the interior thereof by a receptacle wall having a passage therethrough; anda wick in contact with said solid substance and extending through said passage into said interior of said receptacle for limiting diffusion of said liquid substance toward said solid substance to a controlled rate to achieve diffusion-controlled generation of said gaseous product, said wick comprised of a member selected from the group consisting of crosslinked polyvinyl alcohol and combinations of crosslinked polyvinyl alcohol and crosslinked polyvinyl acetate.