| abstract |
An apparatus for dosing a liquid medicine has a balloon (1), a housing (3) and a delivery assembly `b`. The balloon receives and discharges a liquid medicine under pressure. The housing enclosing the balloon has an opening communicating with the assembly `b` in which a flow regulator (10) is installed. The balloon (1) is composed of flat and expansible sheets secured to both side rims of a short cylindrical frame (2). The flat sheets constituting the balloon are of an even thickness over their whole area, even after being inflated with the medicine, so that the pressure as well as the flow rate of the medicine effluent from the balloon will scarcely vary at the mouth over the course of time. Thus, the liquid medicine is dosed to a patient at a constant flow rate through the regulator. |