US 6,981,619 B2
High precision metering and/or additioning device, particularly for granular materials
Renato Moretto, Massanzago (Italy)
Assigned to Moretto Plastics Automation Srl, Massanzago (Italy)
Filed on Oct. 16, 2003, as Appl. No. 10/685,434.
Claims priority of application No. VR2002A0101 (IT), filed on Oct. 16, 2002.
Prior Publication US 2004/0079767 A1, Apr. 29, 2004
Int. Cl. G01F 11/01 (2006.01)
U.S. Cl. 222—353 21 Claims
OG exemplary drawing
 
5. A high precision metering device for granular material which comprises at least one dispensing element, driving means arranged to control said dispensing element, and a program control unit suitable for controlling said driving means and stopping upon reaching a predetermined amount of granules dispensed by said dispensing element, and wherein said dispensing element, or each dispensing element, is mounted for rotation about an axis of oscillation or partial rotation and has a duct substantially shaped as an elbow extending transversely with respect to said axis of oscillation, thereby having a first substantially vertical duct portion that, in use, is permanently filled with granular material, and a second duct portion extending in a transverse direction with respect to said first portion and in communication therewith, thus constantly containing granular material which, in a rest condition, is kept therewithin owing to angled structure of said dispensing element, and wherein said driving means is designed to cause, upon control, said dispensing element to rotate or swivel about said axis of oscillation, thereby causing granules of material to be released from said second portion of said dispensing element each time said dispensing element is caused to oscillate or partly rotate.