Keystone Product Developments Pty Ltd

Keystone Medical Pty Ltd

Kenneth Arthur Logan

Paul Dastoor

Peter J Hester

Ian Clarke

Ian Wesley Robert Clarke

The present invention relates to an apparatus for controlled rate dispensing of a liquid contained in a flexible bag, said apparatus including a chamber adapted to contain the flexible bag containing the liquid, an outlet from the chamber adapted to receive an outlet conduit communicating with the interior of the flexible bag, a source of gas arranged to apply pressure to at least part of the exterior walls of the flexible bag, and a pressure regulator arranged to control the pressure applied to said exterior walls, whereby pressure applied to said exterior walls causes liquid to be dispensed from the flexible bad through the outlet conduit at a controlled rate. A method of delivering liquid at a controlled rate using the apparatus of the present invention is also described.

Liquid dispenser

A fluid flow indicator for observation of low flow rates in liquids includes a capillary tube () slidably mounted at each end in passageways () and () and biased into a no-flow indicating position by a castellated elastomeric membrane () providing a sealed barrier within a chamber () between a first zone () and a second zone (). Fluid flow introduced through spigot () causes the capillary tube () to slide to the opposite end of the passageways () and () whereupon the deformed position of the elastomeric membrane () can readily be observed through transparent walls () in the chamber (). Upon cessation of flow, the elastomeric membrane () causes the capillary tube () to revert to its original position.

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Callaghan, Australia

Kenneth Arthur Logan