Abstract: A fluid spraying saw bar, and a chain sawing apparatus, such as a tree harvester, having such a saw bar are provided for selectively applying a predetermined fluid pattern of urea on a tree stump during felling, and of paint on a log end during bucking. A bar member supports an endless saw chain and has an elongate chamber therein to receive pressurized fluid from a harvester reservoir. Plural fluid emitting holes extend from the chamber to at least one side surface of the bar member. A tubular or a dual valve plate flow controller is slidably received in the chamber operatively engaged by a harvester actuator to control flow through the fluid emitting holes. For a rot-preventing urea spray, the pattern is adjusted for logs of varying diameter. For a marking spray, a striping spray pattern is selected in response to a harvester computer generated signal to indicate log length, diameter, mill designators, and the like.

Abstract: A guide bar for a mechanical harvester wherein the guide bar is repairable after bending. The guide bar is provided with a bendable section in a limited zone between the mounting bracket and the principal cutting portion of the bar. A hinge area is thereby created in the zone area to permit bending of the bar without breaking. The rails are removed within this hinge area. The saw chain traverses the short railless section during normal cutting action. Upon bending of the bar, the chain assumes its own curvature in traversing the section and will more readily jump the bar when bending forces are so severe as to likely break the chain.

Abstract: A guide bar for a saw chain mounted to the boom of a tree harvester. As typical for such guide bars, oilhole holes are provided to receive oil for channeling of the oil to the edge grooves wherein the saw chain is entrained. Not typical of such guide bars is the provision of a pattern of inter-connecting oil channels in the bar for channeling oil to various positions on the bar edge including the bar edges adjacent each oil hole and at the bar nose. C-shaped valves in the oil holes are manually adjusted to control the flow of oil to the various positions.

Abstract: A guide bar for a mechanical harvester wherein the guide bar is repairable after bending. The guide bar is provided with a pliable section of lowered hardness in a limited zone between a mounting bracket and the principal cutting portion of the bar. A hinge area is thereby created in the zone area to permit bending of the bar without breaking. Reduced hardness is tolerated in the zone area where the least cutting action is encountered.