Class 144/339 - By shearing

Subclass of Class 144 - Woodworking
Definition: Process wherein the tree is brought down by a cutting apparatus
No. of patents: 36
Last issue date: 07/17/2007

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Number	Title	Issue Date
7243691	Tree shear A tree shear for use with a prime mover such as a skid-steer loader wherein the tree shear includes a pair of tree shear blades, having forward and rearward ends, which are secured to the forward end of a tree shear frame in a non-movable and fixed manner. The blade...	07/17/2007
6901978	Apparatus and method for cutting trees A tree cutter in combination with a self-propelled vehicle is disclosed for cutting underbrush and small free standing trees, such as, Cedar. The tree cutter is pivotally mounted at the front of the self-propelled vehicle, such as, a Four Wheeler in order to pivot u...	06/07/2005
6662836	Tree shear 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 i...	12/16/2003
6453957	Cutting attachment A cutting attachment is adapted to be mounted onto a vehicle, such as a skid steer loader, and includes a frame that is generally "V" shaped with diverging walls and open in direction of travel. The diverging walls of the frame support upright shafts. Eac...	09/24/2002
6343633	Tree harvester A tree harvester, arranged on the movable arm of a forestry vehicle includes a cutting tool having pivotable claws with releaseable locking elements for relative, mechanical locking of the claws in an inwardly pivoted position, and a longitudinally adjust...	02/05/2002
5826339	Forestry cutting, mulching and clearing tool A forestry cutting, mulching and clearing attachment for a hydraulic excavator that is used for clearing sloped grounds, ditches, and culverts. The device includes two mating jaws which are substantially rectangular in shape and include a plurality of mat...	10/27/1998
5515895	Tree delimbling device with self-aligning cutter head assembly There is provided a tree delimbing cutter head assembly with improved self-aligning cutter head including a rectangular support frame, pivotally mounted cutting and limb stripping levers and guide means, frame support means that provide rotational and piv...	05/14/1996
5503201	Tree shear A pair of pincer-type cutting blades are pivotally supported from a frame to be mounted from a front loader and fluid cylinders having base ends pivotally supported from the frame outwardly of the remote sides of the cutting blades include outer ends univ...	04/02/1996
5355920	Felling and delimbing apparatus allowing to delimb trees in length and its method of use The invention relates to an improvement in a felling and delimbing apparatus having a head for felling and delimbing trees; a frame, at least two grasping jaws and, delimbing knives mounted on said frame and/or on said grasping jaws, and first/and second ...	10/18/1994
5161588	Tree felling head with combination tree accumulator and tree abutment 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....	11/10/1992
5109900	Tree-felling head A felling head for successively grabbing a number of upstanding trees, sequentially sectioning same, and capturing a number of sectioned tree sections one at a time to constitute a pack of sectioned tree sections held by the head, before it is required to...	05/05/1992
5101873	Tree cutting apparatus A tree cutting apparatus includes a frame having forward and rearward ends, with a pair of generally planar blades rotatably mounted on the forward end of the frame. The blades are mounted spaced apart within the same plane, each blade having a cutting ed...	04/07/1992
5044409	Force matching tree shear A tree shear where the shear blade is moved by a power mechanism that includes a link and lever so arranged that the force available matches approximately, at all times, the force required to pass the shear blade through the tree to sever the same....	09/03/1991
4913203	Tree harvester A tree shear is disclosed which has a frame on which is mounted a pair of blades for pivotal movement relative to one another in scissors fashion; the blades being pivoted by hydraulic jacks. Each blade pivots on a rotary shaft having an eccentric center ...	04/03/1990
4908946	Wood cutting shear The present invention relates to heavy duty wood cutting shear attachments of a large scale for connection to a boom structure of a hydraulic excavator for cutting tree stumps and the like. The wood cutting shear includes a swingable jaw and a stationary ...	03/20/1990
4802517	Tree cutting apparatus A cable-supported tree cutting device for use with drag lines and the like provides a tool body having a pair of opposed jaws positioned at one end of the tool body and movable with respect to one another so that the jaws can open and close. An open-ended...	02/07/1989
4679604	Shear blade cutting device with adjusting blade alignment compensator Disclosed is a shear blade cutting apparatus. The apparatus includes a frame assembly having a pair of shear blades pivotally mounted thereto. Actuators are connected between the shear blades and the frame assemblies for moving the shear blades between op...	07/14/1987
4632158	Power limiting hydraulic system The hydraulic system of this invention is for operating a tree processing implement on a work vehicle so that during a first part of an operating cycle the implement is supplied by two hydraulic pumps jointly, while during another part of the operating cy...	12/30/1986
4536976	Branch cutter mounted on front loader bucket Branch cutter for a tractor having a material handling element, such as a bucket. The branch cutter is attached to the bucket and comprises a fixed blade, a movable blade, and a fluid driven actuator operatively connected to the movable blade toward and a...	08/27/1985
4452286	Apparatus for cutting tree parts Apparatus for cutting tree parts adapted to be operatively mounted on vehicles including a base structure configured to define a concave cutting recess for receiving therein the tree part to be cut with at least one pivotable holding arm adapted to grip a...	06/05/1984
4452287	Feller assembly for tree harvesting apparatus A tree feller assembly for use with a tree harvesting apparatus including a support structure defining a common pivot axis with a pair of shear arm means carrying cutter blade means disposed for pivotal movement about the common pivot axis. First power ac...	06/05/1984
4407343	Tree feller with gravitational buncher Described herein is a vehicle-mounted tree harvesting machine. The tree harvesting machine includes a shear which cuts the trees and is arranged so that its cutting motion tends to direct the trees to fall by gravity into a bunching means in alignment wit...	10/04/1983
4399848	Tree cutting mechanism A cutter vehicle is arranged to be moved along a row of trees by a powdered drive vehicle. A boom assembly is secured between the cutter vehicle and the drive vehicle and has relatively movable parts which can extend and retract to vary the longitudinal l...	08/23/1983
4387752	Tree shearing apparatus A tree shearing apparatus including a main frame mountable on support arms of a machine, a pair of pivot pins mounted on the main frame, a blade support arm mounted on each of the pivot pins for pivotal movement about the axis of that pivot pin, a cutting...	06/14/1983
4384599	Slicing apparatus for felling trees A substantially planar base plate has a notch therein of a size suitable for receiving tree trunks. The notch has a first and second side, each side being opposite the other. A substantially planar blade has a convex, arc-shaped cutting edge, and is pivot...	05/24/1983
4100951	Tree shear-pivoted secondary blade A tree shear apparatus includes first and second blades, and linkage means interconnecting the blades so that the first blade makes a partial, relatively small cut of the tree and withdrawal from the tree while the second blade cuts through the tree so th...	07/18/1978
4081009	Method and apparatus for severing fibrous articles such as trees A tree cutting method and apparatus includes at least one shear blade having its tree contacting edge recessed to define a pair of spaced shearing edges with a fiber receiving groove therebetween. A fiber removing device is recessed within the groove out ...	03/28/1978
4077445	Hydraulic circuit for tree harvester In a tree harvesting machine having a shear assembly, a delimbing assembly, a drive mechanism for moving a tree past the delimbing assembly, and a grapple arm for urging the tree into engagement with the drive mechanism and the delimbing assembly, a hydra...	03/07/1978
4061167	Single piece tree shear blade having cylindrically curved cutting portion and method of making same A tree shear blade is formed by pressing a pre-shaped flat metal plate or blank into a die shaped to turn up opposite side and rear tabs of the blank to form mounting portions of the blade and to cylindrically curve a central portion of the blank to form ...	12/06/1977
4057087	Corrugated blade for tree harvester An apparatus includes a pair of corrugated blades, each defining parallel elongated ridges running from the cutting edges thereof substantially the full length thereof. The apparatus may be positioned so that the cutting edges of the blades may be brought...	11/08/1977
4053005	Method of harvesting trees A method of harvesting trees, by engaging separately between a pair of jaws adapted to pivotally open and close, the jaws having vertically spaced, tree-engaging double edges; by cutting the engaged tree between the double edges, the cut tree being held i...	10/11/1977
4050488	Cam actuated tree cutting shears and buncher Shear knives are pivoted, side by side with sharp edges opposed, by a pair of adjacent ends to a pivot strap. Cam rollers are mounted respectively for rotation on the knives at the junctions of their free ends and outboard sides. Rearwardly converging cam...	09/27/1977
4022259	Tree shear A tree shear having two movable shear arms pivoted about a common horizontally disposed axis. Shear blades are rigidly connected at the lower ends of the shear arms and arranged in confronting relation to shear the tree when they are moved toward each oth...	05/10/1977
3999582	Method and apparatus for processing and harvesting trees A method and apparatus for processing and harvesting trees in which the stem of a tree is encircled by instrumentalities mounted on an elongate member positioned adjacent the stem and the upper portion of the stem then exerts leverage about a fulcrum defi...	12/28/1976
3995671	Shear-mechanism-tree harvester A shear mechanism includes shear members pivotally mounted to a first frame, with a second frame movable relative to the first frame, and first and second links connected to the second frame. The first and second links are also connected to the first and ...	12/07/1976
3981336	Tree harvester The following specification discloses a tree harvesting apparatus controlled from a light weight tracked vehicle having a rotatable platform for holding a boom apparatus to which a harvester head is hingeably attached. The harvester head comprises shearin...	09/21/1976

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Class 144/339 - By shearing