Patent ID: 7185686

Claim:
A feeder device in a timber harvester, which includes a frame, a 3-row roller chain arranged to be rotated around a drive sprocket, a turnover member and roll guides, which roll guides extend for a great length of a gripping side of the feeder device, between the drive sprocket and the turnover member, and in which roller chain there are rows of links staggered relative to each other by transverse pins, comprising a middle row of links and outer rows of links, each row of links including rollers rolling in the corresponding roll guides and set in bearings in the transverse pins, and in which the drive sprocket has sprocket teeth arranged to drive the middle row of links of the roller chain through the rollers of the middle row of links, characterized in that the outer rows of links of the roller chain are equipped with rollers of a greater diameter than the rollers of the middle row of links, and the middle roll guide is correspondingly raised relative to the outer roll guides.