Structural supports for heavy duty riddle assembly

Details Structural supports for heavy duty riddle assembly Structural supports for heavy duty riddle assembly

1974-02-22

1976-03-16

Halper, Robert

Classifying, separating, and assorting solids

Sifting

Elements

209363, B07b 146

Patent

active

039444848

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.

REFERENCES:
patent: 249056 (1881-11-01), Jebb
patent: 703887 (1902-07-01), Anderson
patent: 1125762 (1915-01-01), Sturterant
patent: 1459844 (1923-06-01), Mitchell
patent: 2003923 (1935-06-01), Clausen
patent: 2274701 (1942-03-01), Jenks
patent: 2777579 (1957-01-01), Roubol
patent: 3070231 (1962-12-01), McCorhel
patent: 3308952 (1967-03-01), Parks

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