SCREEN DECK Russian patent published in 2009 - IPC B07B1/46 

FIELD: mining.

SUBSTANCE: invention refers to screen deck for screening such material as crushed stone, gravel or such like. The screen of the deck for screening crushed stone, gravel or such like material contains elements for screening. At least one side of each element of screening is not parallel to lengthwise direction of the screen deck; there are elements of screening of at least the first type and the second type. The elements of screening of the first type have height different from height of the screening elements of the second type. The screening elements of the first and second type form different height on the screening deck and create narrowing passages or winding passes for material on the screening deck. The screening elements of different types are alternating and they facilitate not-flat screening. The screen deck has supports; the screening elements have fixtures for fastening them to the supports. The supports have elongated props whereon the ends of the screening elements are secured. The screening elements on both ends have holders with a lock and spring, both interacting with the props made on the supports. The elongated elements and difference of height of different screening elements create steps in lengthwise direction of the screen deck between the screening elements arranged in rows.

EFFECT: increased efficiency of screening.

11 cl, 8 dwg