Tree Felling Apparatus (Patent No: 949853)

Inventor: Dika, Michael

Location: Rycroft

Comments: N/A

Description: [52] CLASS 143-8
[11] 949,853
[54] TREE FELLING APPARATUS
[72] Dika, Michael and Dika, Jerry F., Rycroft, Alberta, Canada
[21] Application No. 164,547
[22] Filed Feb. 26, 1973
5 Claims

[57] A tree feller is involved of the known type wherein a guide bar carrying a saw chain is pivotally mounted on a frame and closes in a horizontal plane toward an anvil. In the invention, the guide bar includes a guard extending over the return run of the saw chain. A housing extends forwardly, from the frame, parallel to but spaced from the anvil. The guide bar retracts into this housing in the open position so that the working run of the saw chain is protected. The kerf of the cut made by the saw chain is equal to or greater than the thickness of the guide bar and guard. A pusher if provided to control the direction of felling. Upstanding shoulders on the anvil and housing prevent the tree butt from skidding to either side. A hydraulic cylinder biases the guide bar and saw chain toward the anvil. The rate of expansion of this cylinder is controlled relative to the load on the saw chain, hence the saw advances slowly at the centre of the tree but rapidly when the cut is almost complete. The feller is characterized by a non-wedging cutting action, so that splitting is reduced; a saw chain which is protected at all times; and efficient use of its cutting power.