Patent ID: 9649435
Date: 2017-05-16
CPC Classifications: A61M

Claim:
1. Dosing mechanism for a fluid, comprising an inlet, an outlet, a dosing pipe and a first valve group and a second valve group each having an inlet valve and an outlet valve, wherein the inlet is connected to both inlet valves and the outlet is connected to both outlet valves, wherein the inlet valve of the first valve group is arranged to connect the inlet to a first end of the dosing pipe while the outlet valve of the first valve group is arranged to connect the outlet to a second end of the dosing pipe, wherein the inlet valve of the second valve group is arranged to connect the inlet to the second end of the dosing pipe while the outlet valve of the second valve group is arranged to connect the outlet to the first end of the dosing pipe, wherein the first valve group and the second valve group are configured such that only the valves of one of the first or second valve group are open at a time thereby allowing the fluid to flow from the inlet through the dosing pipe to the outlet, wherein a dosing object is arranged in the dosing pipe in a manner to be translated from one end of the dosing pipe towards the other by the fluid, wherein the inlet and the outlet are arranged on opposing sides of the dosing pipe, wherein a sensor is arranged for determining the position of the dosing object within the dosing pipe and configured to open and close the first valve group and the second valve group depending on (i) a distance travelled by the dosing object between two positions detected by the sensor and (ii) a set dose volume to be delivered, so as to allow delivery of a dose volume from the dosing pipe smaller than the volume of the dosing pipe less the dosing object, wherein the sensor is a linear charge coupled device, and wherein the dosing pipe is transparent.