Patent ID: 7669397

Claim:
A reel mower, which comprises: (a) a frame supported for movement over the ground; (b) a plurality of reel cutting units carried on the frame to be propelled by the frame over the ground, wherein each reel cutting unit is supported for rolling over the ground by at least one ground engaging roller carried on each reel cutting unit; and (c) at least one mass damper for each reel cutting unit with a mass damper positioned at least proximate to each one of the reel cutting units, wherein the mass damper comprises an autonomous body that is supported out of contact with the ground during operation of the cutting unit as the cutting unit rolls over the ground and that is free to move back and forth as an entire unit relative to the cutting unit and relative to the frame in a movement that counters a vertical bouncing or bobbing of the cutting unit as the cutting unit rolls over the ground, wherein the mass damper is carried within the at least one ground engaging roller of the reel cutting unit.