Patent ID: 8313475
Filing Date: 2012-11-20
Classification: A61M

Abstract:
1. An apparatus for controlled rate dispensing of a liquid contained in a flexible bag, said apparatus including: a chamber configured to contain the flexible bag, the flexible bag having exterior walls and having an outlet conduit for the liquid; a source of gas arranged to provide gas to apply pressure to at least part of the exterior walls of the flexible bag in the chamber; and a pressure regulator positioned between the source of gas and the flexible bag, the pressure regulator being configured to continuously self-regulate a pressure of the gas supplied from the source of gas to continuously maintain the pressure of the supplied gas at a constant and predetermined level and so as to continuously maintain the pressure applied to the exterior walls of the bag at the constant and predetermined level throughout a duration of dispensing of the liquid, whereby the pressure applied to the exterior walls causes liquid to be dispensed from the flexible bag through the outlet conduit at a controlled rate.