Structural supports for heavy duty riddle assembly
AssigneeCentralny Osrodek Projektowo-Technologiczny Przemyslu Maszyn Gorniczych "ORTEM"
InventorWaclaw Jachna
Life of this patent
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Abstract
A riddle assembly for the grading of particulate materials has a pair of screens forming respective screening stages and disposed one above another. Each of the stages is formed by a pair of longitudinally extending rails interconnected by longitudinally spaced transverse rails having multispan configuration with a pair of outer spans projecting laterally outwardly beyond the longitudinal rails and an inner span interconnecting the two rails and disposed between them. The multispan transverse beams are of nonuniform cross-section corresponding to the distribution of stresses whereby each beam is of uniform strength.
Claims5
A riddle assembly comprising:
- a pair of longitudinally extending outer vertical plates;
- a pair of transversely spaced longitudinally extending inner walls disposed between said plates and parallel to a longitudinal plane spaced midway between said inner walls;
- a sieve deck overlying said inner walls and having longitudinal edges projecting laterally beyond said walls, said screen being bisected by said plane and flanked by said outer plates;
- a plurality of transverse beams extending parallel to one another and spaced along and secured to said inner walls, each of said beams having a central span of predetermined length disposed between and interconnecting said inner walls and projecting laterally therefrom, said spans being of nonuniform cross section increasing toward said inner walls proportional to the bending moments along said beams whereby said transverse beams have uniform strength along their full length, and each of said outer spans being at the most half as long as the respective central spans.
Dependencies are inferred from the claim text.