The present invention relates to an apparatus for dispensing fluids, especially particulate matter, from a supply bin. The apparatus includes a plough that is movable at least partially in and out of the bin and which, when retracted, closes a matching aperture in the bin, whereby there is an adequate...http://www.google.fr/patents/US20060175346?utm_source=gb-gplus-shareBrevet US20060175346 - Device for feeding fluids
