Patent ID: 7886938
Filing Date: 2011-02-15
Classification: B65G

Abstract:
1. A powder and granular material feeder, comprising: a bottom plate; an outer tube located upright on the bottom plate; an inner tube spaced from an upper end portion of the outer tube and sharing a center line with the outer tube; an ascendable/descendable height adjusting tube defining a material passage clearance between a lower end of the inner tube and the bottom plate for adjusting height of the clearance; a rotation shaft located on the bottom plate and extending along the center line; a plurality of spokes located on the rotation shaft; a ring located at distal ends of the plurality of spokes and extending along an inner peripheral surface of the outer tube; a plurality of inward claws located on the ring and between the spokes; a fall opening in the bottom plate and open to a space between the inner tube and the outer tube and having an arcuate configuration; a small cylinder comprising a rotor sharing a center line with the small cylinder; a scraping plate located on the rotor, wherein an annular horizontal disk above the fall opening; and a cover on a discharge port in the small cylinder or in a lower end plate of the small cylinder, wherein both the annular horizontal disk and the cover include a ventilation hole and a plug for the ventilation hole.