20120111771 | PARTICLE GRADING AND COLLECTION DEVICE - A grading and collection device includes axial hollow body and suction unit, the hollow body has a first opening and a second opening defined in two ends thereof. The suction unit includes multiple hollow tubes with different inner diameters. The first ends of the hollow pipes located toward the first opening of the hollow body and the second ends of the hollow pipes extend through the second opening of the hollow body. Suction device is connected to each of the second ends of the hollow tubes. The particles of different sizes are sucked into the hollow pipes of different inner diameters. The grading and collection device is compact and efficient. | 05-10-2012 |