Tree shear
OwnerEugene C. Anderseninventor
Life of this patent
Estimating the term…
Abstract
A tree shear attachment is, in one preferred embodiment, designed to replace the shovel at the outermost end of the boom assembly of a backhoe to provide remarkable maneuverability and an extensive range of motion for the shear. One of the severing jaws is fixed, presenting a stationary anvil, while the other is moveable and is provided with a shear blade that moves into engagement with the stationary anvil to complete the severance. Retainers at the forwardmost ends of the jaws help grip and stabilize the butt end of the tree following severance. An upstanding stabilizing rack on the frame of the shear has a pair of laterally spaced, forwardly projecting arms that generally overlie the two jaws to embrace and stabilize upper portions of the tree during and after severance.
Claims20
Tree shear apparatus comprising:
- a boom assembly including an elongated boom having an outer end;
- a frame pivotally attached to said outer end of the boom for pivoting movement relative to the boom about a transverse horizontal axis;
- and
- a pair of jaws mounted on said frame and projecting forwardly therefrom,
- at least one of said jaws being adapted for powered movement toward and away from the other jaw in a shearing action,
- said boom assembly further including a power cylinder operably coupled with said frame in a manner to permit the jaws to be rocked by the cylinder about said transverse axis into any selected one of a number of angularly adjusted positions,
- said other jaw comprising a fixed jaw that includes a generally fore-and-aft extending anvil,
- said one jaw including a shear blade movable into engagement with the anvil for carrying out the shearing action,
- said jaws having a pair of toothed retainers located above the level of said anvil and said blade,
- said retainers being disposed at the forward ends of said jaws and projecting laterally inwardly toward one another,
- each of said retainers including at least one rearwardly facing tooth disposed to assist in gripping and retaining the butt of a tree severed by the jaws.
Tree shear apparatus as claimed in 1,
- said frame having an overhead stabilizing arm spaced above said fixed jaw and projecting forwardly from the frame,
- said arm having a laterally inturned forward portion that presents a receiving nook in the arm generally opposed to said moveable jaw for stabilizing upper sections of a tree being sheared.
A tree shear attachment for a mobile work vehicle comprising:
- a frame presenting a front side and a rear side;
- mounting structure on the rear side of the frame for detachably securing the frame to a work vehicle;
- and
- a pair of jaws mounted on the front side of said frame and projecting forwardly therefrom,
- one of said jaws being movable and provided with a blade, and the other of said jaws being fixed and provided with an anvil,
- said one jaw being adapted for powered movement toward and away from the other jaw in a shearing action,
- said jaws having a pair of toothed retainers located above the level of said anvil and said blade,
- said retainers being disposed at the forward ends of said jaws and projecting laterally inwardly toward one another,
- each of said retainers including at least one rearwardly facing tooth disposed to assist in gripping and retaining the butt of a tree severed by the jaws.
A tree shear attachment for a mobile work vehicle comprising:
- a frame presenting a front side and a rear side;
- mounting structure on the rear side of the frame for detachably securing the frame to a work vehicle;
- and
- a pair of jaws mounted on the front side of said frame and projecting forwardly therefrom,
- one of said jaws being movable and provided with a blade, and the other of said jaws being fixed and provided with an anvil,
- said one jaw being adapted for powered movement toward and away from the other jaw in a shearing action,
- said frame having an overhead stabilizing arm spaced above said fixed jaw and projecting forwardly from the frame,
- said arm having a laterally inturned forward portion that presents a receiving nook in the arm generally opposed to said movable jaw for stabilizing upper sections of a tree being sheared,
- said arm comprising part of a stabilizing rack on said frame,
- said rack further including a second overhead stabilizing arm spaced laterally from the first-mentioned arm and projecting forwardly from the frame generally above said movable jaw.
A tree shear attachment as claimed in 19,
- said second arm having a laterally inwardly extending projection at the outer end thereof.
Dependencies are inferred from the claim text.