Caterpillar Sarl

Caterpillar Commercial Sarl

Jan A Ericksson

A log hauler having a wheeled tractor and one or more wheeled log trailers with support wheels which are individually steerable to permit the log hauler to travel in a serpentine manner through a tree harvesting area. The support wheels are vertically adjustable to provide stability as the log hauler traverses uneven ground.

Vehicle having steerable wheels

A first tree engaging device is attached to the first trimming member and maintains the first trimming member at a transverse position relative to the tree trunk during relative longitudinal movement of the tree trunk. The first trimming member includes a knife portion which includes a knife edge portion structured and arranged to form an angle (&phgr;) relative to the tree trunk surface when placed adjacent to the tree trunk.

Trimming member arrangement for a tree trimming device

A trimming device and method maintains a first trimming member of a tree harvester head at a preselected transverse position relative to a tree trunk during relative longitudinal movement of the tree trunk. A first control device having a tree trunk engaging portion movably connected to the first trimming member selectively establishes the relative transverse position of the first trimming member and the tree trunk. An actuator urges the tree trunk engaging portion into engagement with the tree trunk and the first trimming member at the preselected transverse position.

Growing community of inventors

Osterfarnebo, Sweden

Jan A Ericksson