Abstract: A tree harvester comprises a head boom at the lower free end of which is mounted a tree felling head having a cylindrical cutting knife behind which is formed a storage enclosure for felled trees. The head includes pivotable gripping arms for pressing the cylindrical knife against the trees to be felled and for moving them and holding them in the storage enclosure.

Abstract: A tree harvester comprises a head boom at the lower free end of which is mounted a tree felling head having a cylindrical cutting knife behind which is formed a storage area for felled trees. The head includes pivotable gripping arms for pressing the trees to be felled against the cylindrical knife and for driving them and holding them in the storage area.

Abstract: A tree processing unit for use in combination with a motorized carrier. The unit comprises a base support pivotably mounted on and extending up from the carrier, which comprises a pair of spaced apart side plates parallel to each other and defining a through passage between them. An elongated, tubular base is fastened to the upper ends of the side plates of the base support. This base extends above the through passage defined by the side plates. A rigid, elongated boom is movably mounted through the base and has a front end on which is fixed a tree processing head for gripping and debranching a felled tree. Means are fixed onto the base in front of the support and through passage therefrom for holding the processed tree.

Abstract: A tree processing unit having a base and a boom with a front end and a back end, extending through the base. Means are provided for moving the boom through the base the base has means for gripping a tree at its butt end. Means are fixed on the front end of the boom for gripping and debranching the tree, and for cutting the top of the tree. The unit is adapted to be mounted on known motorized equipment so the unit can be carried and manoeuvred and provided with power.