Device for feeding of granular

Claim 1

IN A DEVICE FOR REGULATING THE FLOW OF GRANULAR MATERIAL BETWEEN A DUCT AND A CONTAINER, A DUCT EXTENSION HAVING OPPOSED END WALLS, A PAIR OF INWARD PROJECTIONS IN EACH END WALL, THE PROJECTIONS OF EACH PAIR BEING EQUALLY SPACED FROM THE LONGITUDINAL CENTERLINE OF SAID EXTENSION AND DEFINING THEREBETWEEN A CENTRAL END OPENING INTO SAID EXTENSION, THE OPENING IN ONE OF SAID OPPOSED END WALLS COMMUNICATING WITH THE DUCT AND THE OPENING IN THE OTHER OF SAID OPPOSED END WALLS COMMUNICATING WITH THE CONTAINER, PARTITION MEANS DISPOSED ALONG THE LONGITUDINAL CENTERLINE OF SAID EXTENSION AND DEFINING OPPOSED SIDE CHAMBERS THEREIN, SAID PARTITION MEANS INCLUDING A SECTOR-SHAPED DAMPER ELEMENT AT EACH END PIVOTED ON THE LONGITUDINAL CENTERLINE AND HAVING AN ARCUATE SURFACE ADAPTED TO CONFRONT THE OPENING AT SAID END, THE WIDTH OF SAID SURFACE BEING COEXTENSIVE WITH THE SPACING OF SAID INWARD PROJECTIONS, MEANS TO PIVOTALLY DISPLACE EACH DAMPER ELEMENT SELECTIVELY BETWEEN THREE POSITIONS, IN THE FIRST OF SAID POSITIONS THE ARCUATE SURFACE OF SAID DAMPER ELEMENT ENGAGING ONLY ONE OF THE PROJECTIONS OF ITS ASSOCIATED END OPENING TO AFFORD BETWEEN THE OTHER OF THE PROJECTIONS AND SAID DAMPER ELEMENT OPEN COMMUNICATION BETWEEN SAID OPENING AND ONE OF SAID SIDE CHAMBERS, IN THE SECOND OF SAID POSITIONS THE ARCUATE SURFACE OF SAID DAMPER ELEMENT ENGAGING BOTH OF THE PROJECTIONS OF ITS ASSOCIATED END OPENING TO CLOSE COMMUNICATION BETWEEN SAID OPENING AND BOTH OF SAID SIDE CHAMBERS, AND IN THE THIRD OF SAID POSITIONS THE ARCUATE SURFACE OF SAID DAMPER ELEMENT ENGAGING ONLY THE OTHER OF THE PROJECTIONS OF ITS ASSOCIATED END OPENING TO AFFORD BETWEEN THE ONE PROJECTION AND SAID DAMPER ELEMENT OPEN COMMUNICATION BETWEEN SAID OPENING AND THE OTHER OF SAID SIDE CHAMBERS.