| 摘要 |
<p>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. A method is also provided of selectively and controllably providing a predetermined spray pattern of fluid on a surface formed by the cutting action of the chain saw during cutting.</p> |
