Patent ID: 8567706

Claim:
A chipper comprising: a feed chute including a loading surface positioned at a rear of the chipper; a cutter positioned between a front of the chipper and the loading surface; a lower feed roller positioned between the loading surface and the cutter, wherein a longitudinal axis of the lower feed roller is positioned below the loading surface and a portion of the lower feed roller extends above the loading surface; an upper feed roller configured to be lowered to apply downward force on the materials to be reduced by the chipper, the upper feed roller having a longitudinal axis that is positioned above the loading surface and between the longitudinal axis of the lower feed roller and the cutter; wherein at least a portion of the upper feed roller overlaps with a portion of the lower feed roller in a vertical direction; and wherein when the upper feed roller is in a lowered position, the outer surface of the upper feed roller does not overlap with the longitudinal axis of the lower feed roller in a vertical direction to enable materials to be reduced by the chipper to climb the portion of the lower feed roller that extends above the loading surface prior to downward force being applied thereto.