Coal sizing grid

Details Coal sizing grid Coal sizing grid

1990-07-30

1992-07-28

Rosenbaum, Mark

Classifying, separating, and assorting solids

Sifting

Elements

209393, 241 81, B07B 150

Patent

active

051338521

ABSTRACT:
A self-cleaning size-segregating grid for a coal crusher has two parallel clearing combs made up of rigid steel fingers which rotate through the grid bars to clear jammed materials therefrom. The propeller-like fingers are preferably staggered in angular orientation on their respective shafts. The shafts are spaced so that the swept volumes of the fingers overlap. A surge detector senses drive motor current as an indication of stall or incipient stall and automatically reverses the direction of rotation of the clearing combs.

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patent: 4721257 (1988-01-01), Williams et al.
patent: 4793561 (1988-12-01), Burda
patent: 4966689 (1990-10-01), Wark et al.

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