Patent ID: 7198112

Claim:
In a minesweeper having a two-sided frame adapted to be coupled to and pushed by a tractor and a rake pivoted from each side of the frame by respective pairs of coupling bars of different lengths so that as the rake moves away from the frame to bury itself in the soil, the coupling bars rotate the rake to a less aggressive digging angle that prevents the rake from stalling the tractor, means connected to the frame for catching and sifting mines, soil, rocks and other objects buried in the soil passing over the rake without small amounts of vegetation and variances in soil conditions clogging the catching and sifting means; wherein the catching and sifting means includes, a plurality of spaced fixed vanes, wherein the frame has a top and a bottom and the vanes run across the bottom of the frame from one side of the frame to the other side, two pairs of rollers, one pair of rollers mounted on the one side of the frame and the other pair of rollers mounted on the other side of the frame, and a pair of endless chains running across the top of the frame and around the rollers.