Patent ID: 7128104

Claim:
A dust control device for use with a grid covering a receiving pit adapted to accept material deposited through the grid, the grid including a series of generally parallel and spaced bars oriented perpendicularly to a series of spaced support beams, the dust control device comprising: a plurality of flights each adapted to be positioned beneath the grid and between an adjacent pair of the support beams, the material being deposited atop the flights after passing through the grid; a plurality of generally vertically extending bulkheads each adapted to be positioned beneath the grid and juxtaposed to a free end of one of the flights to thereby inhibit the escape of dust from the receiving pit; wherein each flight includes a plurality of blades capable of deflecting in response to an amount of material deposited through the grid and onto the blade; and wherein selected blades overlap an adjacent blade in the associated flight and are biased into contact with the respective bulkhead proximate the free end of the blade.