Doser or measured dispensing device for power, crystalline or granular material comprises a concentric arrangement of pipes and a dispensing plunger arranged within a reservoir containing the material to be dispensed

摘要

Doser or measured dispensing device for powder, crystalline or granular material comprises a material reservoir in which an arrangement of concentric rotating pipes is mounted. An inner inlet-outlet pipe rotates within an outer concentric dosing pipe so that it opens an inlet-outlet of the pipe so that it acts as either an inlet or outlet to permit its filling with a measured amount or dispensing of a measured amount.