Conveyors: power-driven – Conveyor section – Screw
Patent
1978-11-14
1980-09-02
Nase, Jeffrey V.
Conveyors: power-driven
Conveyor section
Screw
198658, 198670, 198672, B65G 3320, B65G 3332
Patent
active
042202426
ABSTRACT:
A screw conveyor for feeding solid granular material including a rotary shaft with a screw blade, a drum surrounding the screw blade and concentric with it, and a bearing supporting the shaft for rotation with respect to the drum at an intermediate axial position of the shaft. The screw blade is discontinued at the bearing, having two end portions spaced apart a distance greater than the axial length of the bearing along the shaft. Arms connect the bearing to the drum for applying an axial force to the material being fed past the discontinuity in the screw blade upon relative rotation between the screw blade and the drum. The drum and shaft are normally rotated in different directions. The arm makes a positive angle of about 15.degree. to 50.degree. with respect to a plane perpendicular to the shaft, and is disposed in a plane intersecting a continuation of each of the screw end portions, each arm having an axial dimension at least one half the axial distance between the screw conveyor end portions, and at least 75% of the axial dimension of the bearing.
REFERENCES:
patent: 843676 (1907-02-01), Gustavsen
patent: 1401155 (1921-12-01), Jacoby
patent: 2545140 (1951-03-01), Escher
patent: 2630906 (1953-03-01), Philipp
patent: 2933175 (1960-04-01), Gray
patent: 3050176 (1962-08-01), Brelsford
patent: 3278001 (1966-10-01), Andrews
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