Saw assembly
AssigneeHultdin System AB
InventorRolf Ornberg
Life of this patent
Estimating the term…
Abstract
A saw assembly for a grip-harvester comprises a saw chain running around a bar, a pivotably journalled bar holder, and a liquid supply device having at least one nozzle for supplying at least one functional marking liquid to a cut surface produced during a sawing operation. The nozzle is mounted inside the saw box of the saw assembly and is fixed at a predetermined distance from a tree, measured at the saw cut to be executed. The nozzle is so directed that a liquid jet encounters the bar at an acute angle α(e.g. α=20-40°) and is deflected in towards the cut surface via a space between the bar and the cut surface. A control device initiates the supply of a liquid jet when the bar has been inserted a predetermined distance into the tree.
Claims20
A saw assembly for a grip-harvester, comprising:
- a stand;
- a bar;
- a chain sprocket;
- a saw chain running around said bar and said chain sprocket;
- a bar holder pivotably journalled on said stand;
- a saw motor driving said chain sprocket;
- a hydraulic cylinder mounted on said stand and having a piston rod and a connection to said bar holder so as to move said bar in and out to perform a sawing operation;
- a liquid supply device for supplying at lest one functional marking liquid to a cut surface produced during a sawing operation, said liquid supply device comprising at least one nozzle mounted with a holder and so directed that a liquid jet from said nozzle encounters an opposing side surface of said bar at an acute angle α and is deflected in towards said cut surface in a space between said bar and said cut surface;
- gripping claws for encompassing a tree;
- said nozzle and nozzle holder mounted inside said saw box, so that said nozzle is held at a fixed predetermined distance from a tree measured at said start of said saw cut to be executed when said gripping claws are positioned to encompass a tree and press said tree against said free edge of said top plate of said saw box;
- and
- control means for initiating a supply of a liquid jet from said nozzle when said bar has been inserted a predetermined distance into said tree.
Dependencies are inferred from the claim text.