An apparatus for precisely dispensing free flowing particulate solids with a controllable variable flow rate is disclosed. The invention includes a container for holding a free flowing solid to be dispensed which is pivotable through an angular range of inclination, a transporting mechanism connected...http://www.google.com.au/patents/US4630755?utm_source=gb-gplus-sharePatent US4630755 - Apparatus for precisely dispensing free flowing solids
