Abstract: In various embodiments, a splitter profiler apparatus may include at least one profiler head and at least one circular saw mounted to a common arbor. The circular saw may be mounted to a saw arm, and the saw arm may be coupled with an actuator that is selectively operable to move the circular saw along the arbor. The circular saw may be used in a profiling position, in which the circular saw and profiler head are in close proximity, such that the profiler head and circular saw function collectively to form a sideboard edge with a sawn finish. The circular saw may also be used in a splitting position, in which the circular saw is at a distance from the profiler, to divide the sideboard into narrower sideboards before the sideboards are sawn from the primary workpiece. Corresponding methods and systems are also described herein.

Abstract: A system for assembling a building lumber package includes a lumber sorter sequentially receiving a plurality of boards of different dimensions and selectively placing boards into a plurality of bins, a computer programmed to receive a list of different dimension lumber, to designate one or more bins for accumulating the lumber designated on the list, to receive dimension information identifying each board received by the sorter, and to control the lumber sorter to place boards designated on the list into bins designated for accumulating lumber identified on the list The system may process a plurality of orders for building lumber packages at essentially the same time. Lumber at a lumber mill is sorted into building lumber packages at the lumber mill and stacked and strapped by automated stackers and strappers at the lumber mill. The building lumber packages may be shipped directly from the lumber mill to a building site.

Abstract: An apparatus for selecting and sorting a plurality of random length boards to form at least one row of boards having a total length within a predetermined target length range includes a measurement section operative to measure the length of each board and a sorting section which includes a sorting device and system for sorting the boards. An accumulating row section accumulates and stores rows of boards selected from the plurality of boards and a vacuum suction transport device moves rows of boards from the accumulating rows to a bundling section which receives rows of boards and then bunches and aligns the rows of boards and bundles the rows of boards in a board row bundle. Finally, a central processor performs all calculations and controls to properly sort the boards to create bundles of rows of boards having a total length generally within a predetermined target length range.

Abstract: A method and apparatus are provided for processing rough cut lumber to convert the rough cut lumber into trimmed to length and dimensionally trimmed to form a standard piece of dimensioned lumber. The process and apparatus includes the formation of a plurality of columns of lumber pieces in addition to a one column operation mode. The lumber pieces in each of the columns are graded, indexed, measured for a trim to length, trimmed to length and then sorted by grade and trimmed length.

Abstract: A boom unit for a tree processing machine having a boom with a square cross-section. The boom unit has a boom support with a front boom mounting at the front end of the support and a rear boom mounting at the rear end of the support. The boom is movably mounted through the front and rear boom mountings and is positioned to have a corner of the boom on the bottom and an opposite corner of the boom on the top directly over the bottom corner. The front mounting has a pair of front, bottom rollers arranged in a v shape to cradle the boom with the bottom corner of the boom between the rollers and a single, top, guide member above the bottom rollers and centered with respect to the bottom rollers to ride on the top corner of the boom to hold the boom against the bottom rollers.

Abstract: The method of forming timbers especially for use as webs in timber roof trusses comprising feeding timbers in a predetermined path with the timbers extending transversely to the direction of feed and, as the timbers are so fed, shaping the ends thereof to rounded form, and apparatus for carrying out said method comprising conveyors for feeding the work, a saw for cutting the timbers to length, and cutters for the end shaping.

Abstract: A tool for machining workpieces of wood, plastic material, or the like has at least one plane head provided with cutting knives and having a first end and a second end. A first surface milling cutter is arranged on the first end of the plane head. At least one second surface milling cutter is connected to the plane head and is adjustable relative to the first surface milling cutter. The plane head has at least one axial guide for the second surface milling cutter. The axial guide is a fitting groove provided in the mantle surface of the plane head. The second surface milling cutter has a feather key engaging the fitting groove.

Abstract: An apparatus for forming workpieces with rounded ends especially for use as webs in timber roof trusses. The apparatus includes a feeding system for feeding workpieces into a row of workpieces arranged along a path of travel and cyclically advancing the row along the path to a rotary cutter tool. A movable conveyor receives workpieces thereon and delivers each workpiece sequentially to a loading position adjacent the upstream end of the path of travel. A pushing device is at the upstream end of the path. A common drive shaft simultaneously powers the conveyor and the pushing device. A stop bar prevents movement of the workpieces in a direction generally transverse the path of travel while the cutter tool is shaping the ends.

Abstract: An apparatus for producing an essentially wedge-shaped wood flake comprises a chipping tool rotating about a first, horizontal axis for chipping the flake out of the wood such that the flake has a first, concave surface and a second, convex surface. The flake is delimited between the surfaces. A circular saw blade is provided rotating about a second, vertical axis for removing wood in an area in which the surfaces intersect in an imaginary tip, prior to the chipping out.

Abstract: A tree harvester for continuously cutting and accumulating trees and a method for using such a harvester is disclosed. The harvester has a frame with a cutting area and a large elongate accumulation area. A tree severing device is secured to one end of the frame and a continuous rail having accumulating arms secured to it extends from the cutting area to the rear portion of the accumulation area. The arms are equally spaced apart from each other along the rail, with each arm traveling in a continuous circuit along the rail such that it moves from the cutting area to the accumulation area. During use, the harvester is aligned with a row of trees to be cut. As the first tree is cut by the severing device, an accumulating arm is positioned behind the tree and moves it to the rear most available portion of the accumulation area. As the harvester travels down the row of trees, each tree in the row is cut and moved to the rear most available portion of the accumulation area.

Abstract: The felling and accumulating head has a large accumulation or storage area for severed trees, separate from the severance area at the front of the head, obtained by elevating the accumulation area to extend preferably at least over the rim of the saw disc, and preferably outwardly and rearwardly over the teeth of the saw. Trees are swept from the severance area, up a small ramp into the accumulation area, by arms, at least one of which preferably sweeps at least partially over the saw motor so as to be able to sweep trees a substantial distance rearwardly, i.e. at least beyond an imaginary lateral line through the saw axis.

Abstract: A chain saw guide bar for a tree harvester is arranged to yield when an excessive force is applied such as when the guide bar becomes jammed in a cut. Yielding of the guide bar protects the bar holder from damage. The guide bar is heat treated or otherwise structurally modified to provide the desired yield strength.

Abstract: A tree harvester provided with a rotatable worktable assembly is disclosed herein. The tree harvester includes a movable frame, a worktable assembly rotatably mounted to the movable frame and an upper frame rotatably mounted to the worktable assembly. The upper frame is provided with an articulated boom that includes a feller/grapple head. The worktable assembly includes a tree delimbing mechanism, a tree cutting mechanism and a log stacker. The operation of the worktable is advantageously automated so that the operator can use the boom while the worktable is processing a tree. The position of the worktable between the movable frame and the upper frame makes the tree harvester more compact than conventional tree harvester, while the independent rotation of the worktable assembly and of the upper frame with respect to the movable frame increases the flexibility of operation of the tree harvester.

Abstract: Described herein is a tree felling head for restraining, cutting and manipulating trees. The felling head comprises a holder connected to the manipulator arm of a tree cutting carrier, a motor at least partially housed in either the frame of the felling head or the holder, and a bearing-like member or transmission connecting the motor to the frame of the felling head. The frame further comprises arms for gripping trees and a saw for cutting same. The felling head preferably comprises a gear assembly for augmenting the torque produced by the motor. The gear assembly is preferably a planetary gear train and is at least partially housed in either the frame or the holder of the felling head.

Abstract: A tree harvesting machine having a fixed length boom slidable through a tubular support on the machine. Tree harvesting elements are on one end of the boom. A pair of boom tensioning cables, above the boom, extend between the ends of the boom. Flexible power supply lines extend between the tubular support and the tree harvesting elements, the lines supported in zig-zag fashion between the cables on power line carrying means slidable on the cables. A flexible strap extends between the the ends of the boom, located between the cables, to support the power lines passing between the cables.

Abstract: A timber harvesting machine including a chassis supported by endless tracks. A platform is mounted on the chassis. A platform is rotatable on the turntable in an annular bearing race on the turntable. A boom is mounted on the platform and includes a main boom mounting pin which is pivoted on one side of the axis of rotation of the platform. A boom actuating cylinder has a mounting pin which is mounted on the other side of the axis of rotation and directly over the annular bearing race regardless of the rotational position of said platform relative to said turntable.

Abstract: A flip top housing apparatus for side saw and topping saws used with a tree processing apparatus. The apparatus comprises a bottom section which attaches to one side of a plurality of hinges and a top section which pivotally attaches to the opposite sides of the hinges such that the top section is selectively moveable between a processing position atop the bottom section, shielding the saw blade from the surrounding environment during tree processing, and the transport position adjacent the bottom section, for allowing the housing to avoid low clearances during the transporting of the tree processing device. A lock comprising a handle portion, which fixedly attaches to the top section, and a receiving portion, which fixedly attaches to the bottom section, allows one to fasten the top and bottom section together during the processing position.

Abstract: A harvester is provided including a saw situated on a trailer for cutting purposes. A drive assembly is adapted for guiding logs past the saw for cutting the same.

Abstract: A disc saw felling head has the cutting pocket positioned relative to the tooth entry opening into the housing such that chips being thrown out of the kerf by the teeth are thrown radially outwardly of the entry opening. The chips are thrown against a deflector plate which redirects them back toward the center but away from the disc to dissipate energy in the chips, reduce the directions in which chips are thrown, and reduce clogging of the housing.

Abstract: An apparatus for felling and bunching trees is disclosed. The apparatus includes a front frame and a front axle supported by the front frame. The apparatus further includes a number of front wheels mounted on the front axle and a work tool supported by the front frame. The work tool has a blade for felling trees and a number of work arms which are movable to secure the trees within the work tool. The apparatus further includes a front hydraulic motor operable to rotate the front axle. The front hydraulic motor is supported by the front frame. The apparatus yet further includes a first hydraulic pump operable to supply pressurized hydraulic fluid to the front motor. The apparatus still further includes a rear frame which is pivotably coupled to the front frame, a rear axle supported by the rear frame, and a number of rear wheels mounted on the rear axle. The apparatus still further includes a rear hydraulic motor operable to rotate the rear axle. The rear hydraulic motor being supported by the rear frame.

Abstract: An apparatus for felling and bunching trees is disclosed. The apparatus includes a frame and a yoke pivotably connected to the frame. The apparatus further includes a tool support pivotably connected to the yoke at a pivot axis and a cutting tool supported by the tool support. The cutting tool has a leading edge LE which is advanced toward the trees during a felling operation. The cutting tool further has a trailing edge TE which lags behind the leading edge LE when the leading edge LE is advanced toward the trees during the felling operation. The apparatus yet further includes a tilt cylinder positioned between the frame and the tool support. The tilt cylinder is movable between an extended tilt position and a retracted tilt position. The leading edge LE is moved closer to the ground when the tilt cylinder is moved from the retracted tilt position to the extended tilt position.

Abstract: The articulated boom and utility head for manipulating objects underwater of the present invention includes an articulated arm mounted at a first end thereof to a free floating platform, and a remotely operable utility head mountable at a second end of the arm. At least one sensor for relaying sensed information from the sensor to a remote operator or processor is mounted to the articulated arm. The sensed information is transmitted in real time as the arm remotely operated under water.

Abstract: An improved stump grinding machine includes a turntable assembly on which the engine is mounted for rotation in a horizontal plane. Preferably, the turntable assembly includes a flat plate element on which the engine is carried. One rotatable ring of a turntable bearing is connected to the plate element for rotation therewith. The other ring of the turntable bearing is fixedly connected to the machine frame. A grinding wheel is located at the distal end of an arm structure pivotally connected to the plate element. The grinding wheel is driven from the engine by a pair of successive belt stages. Power between the belt stages is transferred at an idler shaft about which the arm structure pivots. The stump grinding machine includes a hydraulic system to effect horizontal and vertical movement of the grinding wheel as necessary during a cutting operation. The stump grinding machine may be a self-propelled machine, or may be configured for towing behind a vehicle.

Abstract: A guide bar mounting arrangement for a tree harvester. The tail end of the guide bar is provided with a center slot and pin receiving slot at each side thereof. A sliding block has a center boss and pins permanently or removably mounted therein at the sides of the boss and the combination is slidably mounted in a fixture or base member fixedly secured to the harvester adjacent a drive sprocket. The guide bar is fitted to the sliding block center slot receiving a center boss of the sliding block and the pin receiving slots engaging the pins of the sliding block. A saw chain is entrained around the guide bar and drive sprocket and the sliding block moved relative to the sprocket to tension the saw chain. The sliding block is forced against the base member to clamp the bar in position.

Abstract: There is disclosed a tree harvesting head assembly which provides an improved cutting means for permitting movement of a saw chain linearly outwardly from a first position behind a tree to be cut to a second position transversely forwardly of a tree to be cut. The cutting means in combination with the grapple means and engagement arms of the head assembly facilitates the harvesting of trees on rough terrain in an expedited and safe manner.

Abstract: A tree harvester head having a mounting bracket at the back of the type allowing the head to be tilted. The bracket is used to mount the head on the boom of a mobile vehicle. Cooperating mounting members are provided on the head and bracket for rotatably mounting the head on the bracket. Rotating members are provided on the head and bracket for rotating the head relative to the bracket. Hydraulic drive elements are provided on the head for operating the rotating member on the head to rotate the head. A method for cutting trees using the harvester head involves the steps of cutting trees in three adjacent rows or swaths and laying all the cut trees in or adjacent the central swath, with their butt ends all facing in the same direction, for pickup by a forwarder.

Abstract: A treelength processor which tops and delimbs trees by processing from the top of the tree toward the bottom. The treelength processor operates from fellerbuncher piles and processes close to the stumps so that residual material is relatively easily distributed in the forest away from the loading area and substantial reduction in skidder use and chain saw activity is achieved.

Abstract: There is disclosed a workhead for timber processing, the workhead having a main body and a jaw assembly for grappling timber. The jaw assembly includes first and second cooperating pairs of jaw arms that are pivotally mounted to the main body. The first of the cooperating pairs of jaw arms provides cutting blades for delimbing. The workhead further includes a feed roller assembly for translating a felled tree through the cutting blades. First and second feed rollers of the feed roller assembly are associated with the jaw arms of the second cooperating pair of arms of the jaw assembly. A third feed roller is provided on the main body for pivotal movement relative to the main body. The feed rollers also effect compression debarking of the felled tree as it is translated through the cutting blades. Each roller has projecting engaging bars which extend in a generally helical configuration along the outer surface of the roller and between its opposed terminal ends.

Abstract: There is disclosed a workhead for timber processing, the workhead having a main body and a jaw assembly for grappling timber. The jaw assembly includes first and second cooperating pairs of jaw arms that are pivotally mounted to the main body. The first of the cooperating pairs of jaw arms provides cutting blades for delimbing. The workhead further includes a feed roller assembly for translating a felled tree through the cutting blades. First and second feed rollers of the feed roller assembly are associated with the jaw arms of the second cooperating pair of arms of the jaw assembly. A third feed roller is provided on the main body for pivotal movement relative to the main body. The feed rollers also effect compression debarking of the felled tree as it is translated through the cutting blades. Each roller has projecting engaging bars which extend in a generally helical configuration along the outer surface of the roller and between its opposed terminal ends.

Abstract: The device for the disbranching and felling of trees is provided with a chain saw (110) and possesses a seizing means (15,16,17) swivelling relative to the blade (22) of the chain saw with a plurality of grabbing arms that are swivellable about a common axis (13), in which case the device (100) with the grabbing arms (15,16,17), whose bearing brackets and the chain saw (110), with the aid of a slewing means, which swivels the device in each case through 180.degree. to the right or to the left, is connected with a lifting means, while the chain saw (110) with its driving motor, with the aid of a swivel motor to which the chain saw (110) is secured, is swivellable through the cutting area (FIG.1).

Abstract: The felling and accumulating head has a large accumulation or storage area for severed trees, separate from the severance area at the front of the head, obtained by elevating the accumulation area to extend preferably at least over the rim of the saw disc, and preferably outwardly and rearwardly over the teeth of the saw. Trees are swept from the severance area, up a small ramp into the accumulation area, by arms which preferably sweep over the saw motor so as to be able to sweep trees a substantial distance rearwardly, i.e. at least beyond an imaginary lateral line through the saw axis.

Abstract: A tree processing machine having a boom, a tree processor head carrying tree processing elements, and a rotator rotatably connecting the tree processing head to the end of the boom. The rotator has a casing, that is non-rotatably mounted from the end of the boom, and a support shaft hat is mounted in the casing for rotation about its longitudinal axis relative to the casing and that supports the processor head at its lower end. Rotating means are provided on the rotator for rotating the support shaft relative to the casing. A first set of hydraulic lines extend from the boom to the casing and a second set of hydraulic lines extend from the support shaft to the processor head. Hydraulic flow paths extend through the rotator between the first and second sets of hydraulic lines.

Abstract: A bolt-on mounting assembly for mounting a saw head having a base member and a generally vertical member extending from the base member to a tractor having first and second lift arms comprising a mounting lug, structure for securing the mounting lug to the saw head, structure for receiving the first lift arm of said tractor, and structure for securing the first lift arm to said structure for receiving the first lift arm.

Abstract: A tree harvester for felling, limbing and cross-cutting tree trunks, comprising a limbing head (15) and felling head (16) assembly which is carried by a boom system. The limbing head (15) and the felling head (16) are detachably connectable to one another and are commonly pivotal about a point (21) on the boom system in conjunction with a tree felling operation. The limbing head (15) and the felling head (16) can be moved away from one another along the boom system (10, 18) in conjunction with a tree-trunk limbing and cross-cutting operation, and also in different directions away from the location on the boom system at which they are commonly pivotal.

Abstract: 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 mating cutting surfaces. The clearing apparatus is designed to cut standing trees and brush using both longitudinally and laterally oriented cutting surfaces. In the preferred embodiment, the first jaw includes a curved blade and a pair of cutting blocks, while the second jaw includes a pair of curved blades and a cutting block. Each jaw has a pair of fixedly attached brackets which are used to pivotally mount the jaws to the boom structure of the hydraulic excavator. The jaws have a mutual pivoting point attached to the central boom of the excavator, and peripheral pivoting points movably attached to the control rams of the hydraulic cylinders. The hydraulic cylinders may be actuated to open and close the jaws in order to cut the debris into mulch.

Abstract: A disc saw felling head has a window in a sidewall of the head through which chips are discharged in a tangent plane and a discharge chute over the window. The chute has a top wall and inner and outer sidewalls shaped so that chips exiting the head through the window are directed along a chip path which is generally parallel to the tangent plane and first turns further rearward and then turns outward through a lateral discharge opening in the chute.

Abstract: The felling and accumulating head has a large accumulation area for trees, obtained by elevating the accumulation area to extend outwardly and rearwardly over the teeth of the saw. Trees are swept from the front severance area, up a small ramp into the accumulation area, by a taker arm, and are retained there by a tucker arm. The taker and tucker arms pivot preferably on the same axis, on the opposite side of the head from the accumulation area, and sweep over the saw motor, to sweep trees a substantial distance rearwardly, i.e. at least beyond an imaginary lateral line through the saw axis. The butt plate is recessed beneath the top of the saw kerf, which permits the head to be angled forward slightly for continuous advancement from one tree to the next.

Abstract: A head for harvesting and processing a tree is disclosed with drive rollers which can be pivoted away from the grapple arms to enable the head to select a tree from a group of felled trees for processing when the rollers are pivoted back into place.

Abstract: The invention relates to a self-propelling branch remover with the aid of which relatively large branches on trees, but even whole trees, can be gripped and capped.For this purpose, either so-called felling saws have previously been used, which were attached to the front end of a hydraulic crane and gripped the trunk with claws and sawed it off using a pivotable capping saw. The other solution was that of a worker who was lifted in a lifting basket up to the relevant place and carried out the work there manually using a saw. In both cases, the sawn-off parts dropped down in an uncontrolled manner since even the felling saws did indeed hold the piece tight, but could not hold it in the original position since they could not be used to transmit a torque to the crane arm. The attachment was effected by means of two universal joints.In the present case, this is prevented in that a connection between the felling saw unit and the machine frame is selected, which can absorb both bending forces and torques.

Abstract: A tree feeding device of a tree handling machine has a saw (8) for cross-cutting of a tree trunk, a conveying unit (2) for moving the tree trunk, an actuator (4) for positioning the conveying unit (2) as well as delimbing blades (6) for delimbing the tree trunk. The conveying unit (2) has a rotatable structure with peripheral, substantially rigid surface adapted to support a continuous contact member, which transmits force between the rotatable structure and the tree trunk. The force acting between the rotatable structure and the tree trunk is adapted to be transmitted directly between the peripheral surface and the continuous contact member of elastic material, which is in direct contact with the peripheral surface and capable of moving freely in relation thereto in a manner determined by the load acting on the elastic material.

Abstract: The tree cutter device has a quick release mechanism for the gripping of the tree to be cut and for the quick release after cutting. The gripping mechanism is actuated upon contact of the tree cutter device with a tree with the gripping force with a tree at a maximum when the tree cutter device is fully against the tree. After cutting the tree, the gripping mechanism is released by the moving of the tree cutter away from the tree or by releasing the hydraulic or pneumatic cylinder driving the tree clamp in the non-mechanical modes. In the mechanical mode a combination of levers and tensioning springs comprise the tree gripping mechanism that is actuated by a trigger arm that is actuated by the contact of the tree cutter device with the tree.

Abstract: A timber harvester includes a scissors-like frame component including opposing segments with a common joint, a fork-shaped tilting device, a saw device installed at the rear end of the harvester, opposing tree feed devices installed on both of the aforementioned segments, articulated lower delimbing blades driven by an operating device, and at least one upper delimbing blade supported by at least one segment. The upper delimbing blade is secured, with the aid of the first and second sliding members from both segments so that the first sliding members include, in both segments, a linear guide that lies generally in the direction of the segment itself, and slides adapted to the linear guide in the upper delimbing blade. The second sliding members including at least one joint in the upper delimbing blade of the nearest slide, and at least one curved guide in one segment, the second sliding members being arranged to prevent the twisting of the upper delimbing blade.

Abstract: A combined tree feller processor has a head mounted to a boom with a three-axis coupling. The coupling allows an operator to control the orientation of the head. The head has tree processing means and a continuously rotating high speed saw for cutting trees. While trees are being cut the head is held firmly with respect to rotation about a third generally vertical axis. After a tree has fallen the third axis is in a horizontal position and is perpendicular to the longitudinal axis of the head. The head is allowed to float with respect to the third axis as the tree is processed.

Abstract: There is disclosed a tree harvesting apparatus which provides a helical spline for permitting movement of a harvesting head about a central vertical axis thereof. This provides enhanced manoeuverability of the head to prevent damage to saplings or other immature timber. A chain saw chain detensioning system is also disclosed. The system permits a quick removal of a saw chain from the chain saw without the use of tools therefore is more easily changed in an expedited manner.

Abstract: A combined harvesting and transporting forestry machine includes a multi-directional pivotable and extensible boom assembly (1) having a crosswise jib (2) fitted at its outermost end. A clamp harvester (4) is carried by one end of the crosswise jib (2). A loading gripper (3) is carried by the other end of the crosswise jib (2). The crosswise jib (2) is adapted to pivot about an axle (8) such that either tool (3,4) may be moved to a working position.

Abstract: A side saw assembly for a tree processing apparatus. The side saw assembly is rotatably and pivotally attached to a mounting platform on a trailer such that the side saw assembly is selectively movable between a transport position, resting on top of the trailer, and ground positions, resting on the ground adjacent either side of the trailer. A connecting arm is pivotally attached at one end to a swivel mount, which is affixed to a side saw assembly. At its other end, the connecting arm is pivotally attached to a swivel mount affixed to the mounting platform. A lift handle is attached to the side saw assembly such that it may be grasped by the grapple of a knuckle boom loader to move the side saw assembly from the transport position to the ground position on one side of the trailer or the other.

Abstract: The felling and bunching head for severing and grouping trees has a shear or saw or the like for severing trees, and an accumulation area for accumulating severed trees, extending rearwardly from the shear or saw, substantially outwardly and away from a centerline of said head. Taker and tucker arms are pivotally mounted to pivot towards and away from the accumulation area. The taker and tucker arms are mounted via pivotal connections located substantially outwardly from the shear or saw on the opposite side of the centerline from the accumulation area, on substantially the same axis. The taker and tucker arms have generally similar geometries facing the accumulation area, as viewed from above, thereby presenting generally similar geometries to trees in the accumulation area, thereby minimizing jostling of the trees when they are alternately held in the accumulation area by the taker arm and by the tucker arm.

Abstract: Timber harvesting apparatus and methods for use in swampland utilizing an amphibious feller-buncher, an amphibious de-limber, an amphibious log carrier, and an amphibious service vehicle.

Abstract: In the present invention, there is provided a tree processor attachment for optionally mounting transversely on a forward section of the log carrying portion of a log porter, so that a log porter may advantageously be used to process felled trees, and to carry logs therefrom to a forest road. The tree processor attachment comprises a tree trunk holding and severing portion and a tree trunk advancing and delimbing portion having a pair of tree trunk delimbing jaws. The tree trunk advancing and delimbing portion is telescopically mounted in the tree trunk holding and severing portion, and is movable back and forth a pair of tree trunk holding jaws. The tree trunk advancing and delimbing portion is timely operable in association with the tree trunk holding jaws for moving a tree trunk in successive unidirectional movements toward a tree trunk severing saw. The tree holding and severing portion of the tree processor attachment is rotatable within a sway angle about a swivel member on a mounting base thereof.

Abstract: The mechanism is used for rotating a tree-felling implement rotatably connected to a distal end of a boom of a logging vehicle by an implement pivot. The mechanism comprises a pinion coaxial with the implement pivot and fixed in rotation with reference to the distal end of the boom. Two longitudinally extending actuators are mounted on the frame. Both actuators are lying in the pinion plane. Each actuator is adjacent to the pinion on a respective side thereof, namely right and left, and bears a corresponding sprocket coplanar with the pinion plane and rotatably connected to their free end. To link the elements together, there is provided a chain in mesh with the sprockets and the pinion. The chain has ends rigidly attached to the frame of the implement. In use, the implement is rotated as the actuators are operated in opposite directions.