Abstract: A bi-directional rotation feed roller for tree processing devices preferably includes a drive wheel, a drive disc, a plurality of reinforcement rings and a plurality of reinforcement plates. The drive wheel includes a drive cylinder and a plurality of media engagement thumb nails attached to the drive cylinder. The plurality of media engagement thumb nails are preferably arranged in a plurality of rows. A side wall of the plurality of media engagement thumb nails are preferably angularly offset from a lengthwise axis of the drive plate. The drive disc is attached to the drive wheel in substantially a middle of a with thereof. The plurality of reinforcement rings are attached to an inner perimeter of the drive wheel. The plurality of reinforcement plates are attached to an inside perimeter of the drive wheel between the drive disc and one end of the drive wheel.

Abstract: A quick change chain saw system includes a swing arm and a hydraulic clamp device. The swing arm extends from the hydraulic clamp device. The swing arm retains drive sprocket components and is retained by a tree harvester or wood processor unit. The hydraulic clamp device includes a hydraulic clamp block, a puck plate, a clamp plate and a detent pin. The puck plate includes a base plate and three stud projections that is actuated with a plurality of pucks in the hydraulic clamp block. Three stud projections extend from the base plate and are inserted through the hydraulic clamp block. The clamp plate is secured to the three stud projections. A spring tensioner is used to bias the chain bar. A retraction tool is used to retract the hydraulic clamp device. The detent pin is used keep the hydraulic clamp in a retracted position for changing the chain blade.