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US 5,161,588 AGranted
Tree felling head with combination tree accumulator and tree abutment
AssigneeLogging Development Corporation
InventorDouglas D. Hamilton
Life of this patent
Estimating the term…
Abstract
A felling head having a combination tree accumulator and abutment apparatus which eliminates the need for additional grapple arms to secure accumulated trees thus simplifying and lightening the felling head.
Claims6
A tree felling head for severing standing trees and accumulating a number of said trees in a substantially vertical position prior to releasing them comprising:
- (a) a frame;
- (b) a tree severing device pivotally attached to said frame to move so as to sever a standing tree, said severing device being a shear comprising two arms, pivotally attached to said frame, that extend in a direction downwardly and away from said frame and shear blades fixed to the outermost ends of said arms;
- (c) a combination heeling abutment and accumulating shelf attached to said frame, said heeling abutment being located at a position spaced rearwardly behind said severing device and said accumulating shelf being attached to said heeling abutment and extending substantially horizontally in a direction forwardly to a position adjacent a standing tree severed by said tree severing device;
- (d) two grapple arms attached to said frame above said tree severing device, at least one of said arms being movable toward and away from the other to embrace a tree to be severed;
- and
- (e) hydraulic power means to effect the functioning of said grapple and said tree severing device.
3 more elements
A tree felling head comprising:
- (a) a frame;
- (b) a grapple mounted on said frame and having articulated arms for embracing a standing tree;
- (c) an upper abutment secured to said frame and engageable with a tree(s) embraced by the grapple;
- (d) a lower abutment secured to said frame and engageable with a tree grappled by the grapple after it has been severed from its roots;
- (e) a tree supporting platform secured to said lower abutment and projecting forwardly therefrom, said platform having a leading edge that is engageable with the tree as it is being severed from its roots, upwardly projecting formations on said platform for enhancing tractive engagement with the butt end of a tree(s) resting thereon;
- (f) a tree severing device comprising two arms pivotally mounted on said frame and extending in a direction away therefrom, each said arm having a shear blade secured thereto adjacent the free outer end thereof, said shear blades being disposed at a position for severing a standing tree grasped by the grapple;
- and
- (g) controllably operable means for operating said grapple and said severing means;
- said supporting platform and the leading edge thereof and said tree severing means being so positioned relative to one another that after a standing tree has been severed from its roots by said severing means the tree is shiftably movable rearwardly by said grapple to engage said lower abutment means and said upper abutment means.
6 more elements
Dependencies are inferred from the claim text.