Abstract: A saw blade and saw-blade support are provided for a power-driven saw. The saw blade has planar cutting members and planar link members which are pivotally connected together. Each cutting member has a recess for receiving a portion of a link member. The saw-blade support is a blade support face, including a generally straight first section for bearing the cutting load, an arcuate second section merging with the straight first section and defining an end of the elongate member, and an arcuate third section merging with the arcuate second section, but having less curvature than the second section. The end of the saw-blade support carried by the power drive components has an outwardly-flared guide wall for leading said saw blade from the power drive onto the saw-blade support.

Abstract: Saw chain is assembled with wear links for improving the resistance of saw chain to abrasion from the saw bar. In one embodiment, the wear links are mounted one beside each steel side link in the chain and are constructed to ride along the outer surfaces of the pair of parallel rails upon which the side links also ride as the chain is driven around the bar. The wear links, however, are formed of a material that better resists abrasion than steel but consequently has less tensile strength. To assure that the tensile load on the chain is assumed by the steel side links while the chain is supported on the bar by the wear links, the wear links have oblong pin openings of the same height but of greater length than the circular openings of the side links. In a second embodiment, the wear links are mounted on both sides of each drive link rather than beside each side link.

Abstract: A saw chain for motor-driven chain saws includes a cutting link which has three mutually adjacent supporting surfaces defining a U-shaped cutout for accommodating a hard metal insert in the form of a cutting plate therein. The support of the insert is provided at only subportions of these supporting surfaces and the remaining subportions provided an adequate spacing so that a solder gap is formed. The hard metal insert placed in this cutout has an adequate service time and does not require special equipment to hold the same during automatic soldering thereof into the cutting link.

Abstract: A link for a chain has a first planar portion and a second portion integral with and disposed adjacent the first portion, the second portion being folded over to form a bight having a pair of parallel, laterally-spaced opposed walls defining a space therebetween and adapted to receive a first portion of an adjacent link.

Abstract: A compact chain saw capable of cutting relatively hard materials and suitable for field work having a saw chain with cutting links each provided with a plurality of teeth having cutting edges thereon and driving notches provided on base portions of the cutting links to be held and pivotally supported by pairs of side links. The cutting edges are displaced in the lateral direction with the base portions of the cutting links in sliding contact with bottom portions (inner peripheral edges) of the guide grooves, and the pairs of side links riding on both side edges of the guide grooves, whereby the saw chain being rotatingly driven is restricted from pivot action and side-run phenomenon during cutting.

Abstract: An apparatus for cutting a soft material, such as meat, from a hard material, such as bone, according to the invention has a chain formed of a succession of alternating cutting and coupling links extending along a longitudinal line. The cutting links are of generally polygonal cross-sectional shape and have corners forming longitudinally extending sharp cutting edges spaced a predetermined maximum transverse distance from the line. In addition the coupling links are of a predetermined maximum radial dimension from the line shorter than the distance such that the cutting edges project transversely beyond the coupling links and the cutting links are rotatable in the chain about the line. This chain is advanced in a longitudinal direction parallel to the line. Thus the cutting links will naturally pivot to lie flat on the hard material and slide therealong, neatly cutting along the hard/soft interface.

Abstract: A cutting link having a cutter portion and a depth gauge. And a guide edge extending between the depth gauge peak and cutter portion for guiding a file to sharpen the cutting edge of the cutter portion. In the process of sharpening the cutting edge, the cutter portion is abraded away along a line that furthers the guide edge and thereby continues the guiding of the file to properly file the cutting edge.

Abstract: An articulated saw chain having pivotally interconnected center drive links and side links. The side links having bottom edges that incur splaying as a result of the side links pounding the guide bar rail during cutting action. An inset portion provided on the center links in the area of overlap defined by the bottom edge surface being pivoted relative to the center drive links. The insets thus providing added clearance to permit substantial splaying of the bar engaging bottom edge surface of the side links without interference and binding.

Abstract: A saw chain has pivotally interconnected chain links which includes cutting links and safety links and these links are effective as working links. The cutting links are each provided with a cutting tooth for cutting into wood and the safety links are each provided with a projection which limits the depth of the cut of the cutting tooth which follows the safety link. The pivot axes of the chain links lie in an action plane above the guide bar in the stretched portion of the saw chain when the latter is subjected to the pulling force exerted by the drive of the chain saw. The cutting links are pivotable with respect to this plane. In addition, the safety links can also be pivotable in this manner. When the cutting links are in their pivoted-out position under this pulling force, no clearance angle is available at the roof of the cutting tooth so that the cutting edge has no cutting effect. For this reason, there is no kickback when the saw chain is placed against the wood.

Abstract: With motor-driven chain saws, there is the danger that the chain saw will be thrown upwardly and rearwardly when it is applied to wood by the user with a forward thrust. Serious injuries can then occur. The invention is directed to a motor-driven chain saw which is so configured that the cutting forces are automatically reduced in response to the occurrence of excessive reaction forces so that the reaction force is immediately reduced to a tolerable amount thereby eliminating the kickback effect. The drive links engaging the nose sprocket of the guide bar are so dimensioned that they can further pivot in the tooth gaps of the nose sprocket out of their normal position and, in this way, take the cutting links with them in such a manner that the free angle of the cutting teeth is reduced. The drive links are latched in the pivoted-in position on the nose sprocket in order to assure that the cutting links will retain the position with the reduced free angle over the entire turnaround region of the guide bar.

Abstract: A safety chain for a chain saw comprising drivers connected by side link units each having a pivot fulcrum on its lower edge running in contact with the saw blade kerf bottom, the side links including a cutter tooth, a depth gauge, and a safety device for the particular cutter.

Abstract: A chain with cutting teeth wherein a width of a gauge of a drive link is reduced, and a ratio of a set to a height of cutting teeth of a cutter link is below 0.55.

Abstract: The present invention relates to a device for cutting the casing on baked carbon electrodes. The device comprises a ring (1) which is freely suspended about the electrode. At least two clamping shoes (7) having vertical extending cutting edges (17) are pivotably suspended to the ring (1). The clamping shoes (7) can be pressed against the casing (3) by means of first hydraulic cylinders (14). On the top of the ring (1) a chain (18) having a plurality of cutting wheels (19) is arranged. One end of the chain (18) is secured to a second hydraulic cylinder (26) and the other end is secured to the piston (27) of the second hydraulic cylinder (26), whereby the chain (18) can be tightened about the periphery of the electrode (2). A third hydraulic cylinder (29) is secured to the ring (1) while the piston (28) of the third hydraulic cylinder (29) is secured to the claim (18), whereby the chain (18) can be moved backwards and forwards along the circumference of the casing (3).

Abstract: A saw chain length including articulated alternating center drive links and side links. Cutting links provide certain of the side links and a safety side link precedes each cutting link. The safety side link and its opposing tie strap link have shaved heel portions and thereby are raised off the guide bar when normally tensioned around the guide bar. The safety link is configured whereby engagement thereof by material being cut during a cutting operation induces pivoting of the safety link against the opposing tension force, which tension force thereby absorbs the impact prior to said heel portions engaging the guide bar edge.

Abstract: A cutting element for being longitudinally connected to form a saw which can cut in two or four planes and "to and fro" because of its self-cleaning action during use provided by rotating a blade 90.degree. in relation to its connected preceeding blade.

Abstract: A cutting chain for a chain saw including a safety element normally preventing the cutter tooth from cutting wherein the safety element is mounted on the driver link and by inward pressure; i.e., toward the cutter bar, is rotated to a position under the cutter tooth so that the latter may cut.

Abstract: The link comprises a support member 1 adapted to slide on a blade, and a cutting element 20 solidly connected to the support member. The support member 1 has two spaced parallel flanks interconnected by a rounded portion 30. The cutting element 20 takes the form of a small metal plate arranged transversely with respect to the two flanks 2, 3 in an opening 5 provided for this purpose, and the rear surface of which has a central stud 27 enclosed by the two flanks 2, 3 and by the rounded portion 30. The small plate 20 is made of tungsten carbide and is located at its lower end its engagement in two notches 7 and 8 formed in the support member 1.

Abstract: A cutting chain for a chain saw including a safety element in front of a cutter tooth, the safety element normally extending past the cutter tooth to inhibit cutting, but depressible by a solid object such as wood to allow cutting.

Abstract: A cutting chain for a chain saw including a clearer immediately in front of the cutter tooth, the clearer normally extending past the cutter tooth and preventing cutting but depressible by a solid object such as wood to allow cutting.

Abstract: A power driven saw is provided with an endless array of planar cutting members interconnected to form an articulated saw blade that resists inward bending. The cutting members are disposed about the periphery of an elongated saw blade support structure to present a circumferential band of cutting teeth.

Abstract: The invention is directed to a saw chain for a motor-driven chain saw which includes cutting links, side connecting links, driving links and safety links. Each safety link has an upper edge defining a wave-like contour that prevents chips from accumulating during the cutting action. The cutting links and safety links of the saw chain are arranged with respect to each other so that overlap is avoided between the tail end of the rearward projection of the safety link and the forward projection of the depth limiter of the cutting tooth. This affords the advantage that cutting chips do not become jammed therebetween.

Abstract: The saw-chain of a chain saw includes a plurality of link assemblies, each link assembly including a working link having a cutter element attached thereto, a control link having a control lug which extends into a guide groove in the peripheral edge of the saw-bar and a connecting link, each link having opposite side faces, and a unitary plastic sealing means attached to the opposite side faces of the links and including overlapping edge portions which extend along the opposite side faces of the saw-bar.

Abstract: The specification discloses a completely outside sharpenable saw chain of the chisel type in which top plate portions are sharpened on their tops and in which side cutter portions are sharpened on their outer sides. The chain has allochiral cutter teeth each having a top plate portion sloping rearwardly and downwardly and joined along one side edge to a side slitter plate portion sloping rearwardly and inwardly, a bent over shank portion, a body portion and a depth gauge portion, wherein the top plate portion, the side plate portion and the shank portion taken together are generally C-shaped in cross-section. The top plate portion has, at its top, a sharpenable end surface forming a top cutting edge ending in a corner chisel point from which a side cutting edge extends downwardly and rearwardly. The side cutting edge is formed where the sharpenable forward end surface of the side plate portion, oriented toward the outer side of the saw chain, intersects the inner face of said side plate portion.

Abstract: A flexible cutting element composed of a plurality of chain links to which are attached tubular cutting units each of which is fabricated with a plurality of cutting teeth protruding upward and disposed at intervals extending radially around the periphery of the cutting unit. The direction of cutting of said cutting teeth are disposed alternately in opposite directions to enable said cutting element to cut a selected material when an oscillating motion is imparted. Various cutting unit designs are presented.

Abstract: A cutting apparatus designed to produce an oscillating force which is transmitted to a cutting element, said cutting element having a plurality of cutting teeth disposed at intervals in a complete circle around the periphery of the cutting element. The direction of cutting of the cutting teeth of said cutting element is alternated in opposite directions so that when to the cutting element is applied an oscillatory force, half of the cutting teeth will cut in one direction and the other half in the opposite direction. Thus the cutting apparatus disclosed herein is designed to work with any oscillating flexible cutting element of the type described above.

Abstract: A power driven saw is provided with an endless array of planar cutting members interconnected to form an articulated saw blade that resists inward bending. The cutting members are disposed about the periphery of an elongated saw blade support structure to present a circumferential band of cutting teeth.

Abstract: A saw chain, for power saws, having cutting links alternately on the right-hand and left-hand sides, central driving links, and lateral connecting links. The individual links are pivotally interconnected by means of pins. At least some driving links are provided with a safety projection, which extends in the opposite direction to the direction of rotation. The outer edge of the safety projection is radially farther than the outer edges of the connecting links of the following driving link. As the chain rotates around the free end of the guide rail, in the direction of travel, the rearmost section of the outer edge of the safety projection describes a trajectory which is greater by predetermined amount than the trajectory described by the tip of the cutting tooth.

Abstract: An arrangement for lubricating saw chains of power saws. The chains include chip removing members, cutting tooth members, connecting links, and other chain members joined by rivet connections. The extensions of the chip removing members run in a guide bar provided with an oil supply. The chip removing members are provided on at least one of their side surfaces with at least one oil guide in the form of a groove in the side surface, which guide extends counter to the running direction of the saw chain and at an incline upwardly toward the rivet connections. The oil guide merges into an oil channel which with at least one of its ends is located in the vicinity or close range of a rivet hole.

Abstract: The invention concerns a chain saw for a tree cutting device.This chain is composed of cutting links (2) having two cutting teeth (6) located on either side of the longitudinal axis of the chain, one of the teeth being basically in the plane of the chain and the other tooth being displaced with respect to the plane of the chain, and the cutting links being so placed that the chain presents, on either side of its longitudinal axis, successively, a tooth displaced on one side of its plane, a tooth in its plane, a tooth displaced on the other side of its plane, a tooth in its plane, and so forth.

Abstract: An improved, endless safety saw chain includes a pair of side links, one of the side links being a cutter link and the other of the side links being a noncutting link and having a depth gauge in substantial alignment with a depth gauge on the cutter link. A preceding center drive link may include an upward and rearward sloping surface positioned to extend between the depth gauges of the side links. The sloping surface is preferably dimensioned so as to be in substantial alignment with the depth gauges as the saw chain articulates about the nose of the chain saw bar.

Abstract: This invention pertains to apparatus for trimming branches of trees and particularly branches high above the ground, without a pole saw, climbing the tree or using a ladder. The apparatus include spaced cutting links with sharp teeth at one end fastened upon a flexible chain. Each end of the chain is connected to a length of rope. A metal weight, sand bag, etc. attached to one of the ropes carries the flexible chain into position over the branch desired to be cut. A counter weight is also provided on one end of the flexible chain to automatically position the cutting side of the spaced cutting links in a downward facing, cutting position as the chain is pulled up onto and over the branch.

Abstract: A power driven saw is provided with an endless array of planar cutting members hingedly interconnected to form an articulated saw blade. The cutting members are disposed about the periphery of an elongated saw blade support structure to present a circumferential band of cutting teeth.

Abstract: A tree harvesting cable saw includes an elongated flexible cable that has a plurality of tubular cutting links located at spaced intervals thereon with reversible drive means for driving the cable saw in either direction of its length. Each cutting link has an axial opening for receiving the cable and a continuous cutting edge on each end extending circumferentially around the entire cable and being spaced therefrom so that the cable can be driven in either direction and sever a tree. The cable saw is supported on a frame through a drive pulley and a driven pulley and is driven by a reversible motor. Preferably, the frame is movable between positions so that the cable saw can be forced through a standing tree to sever the tree adjacent its base.

Abstract: A powered machine for cutting hard or soft materials such as steel, wood, or the like of comparable hardness, including an endless array of truncated conical teeth affixed end-to-end, longitudinally on a common central axis, the array being disposed about at least two pulleys, at least one of which includes a circumferential recessed track shaped to receive each of the conical teeth. The cutting array is driven around the pulleys in the direction of the larger end (in diameter) of each tooth. The device is capable of cutting one or more pieces of material from any angular direction relative to the plane perpendicular to the central axis of the band of teeth. In one embodiment, the teeth are connected together by movable links which allow for replacement of an individual tooth, if required.

Abstract: A plurality of cutting teeth are disposed at intervals in a complete circle around the periphery of a flexible cutting element. A frame is coupled to the cutting element to receive and guide the cutting element. Means is coupled to the cutting element and to the frame to impart an oscillatory motion to the cutting element to enable the oscillating teeth of the cutting element to cut a selected material. A simplified version of the present invention includes first and second handles coupled to opposite ends of the flexible cutting element to enable an operator to impart an oscillatory motion to the cutting element.

Abstract: A saw operable from ground level for cutting limbs from a tree is disclosed. The saw comprises a plurality of relatively short, flat-sided, thin saw blades with each blade having saw teeth along at least one edge. The saw blades are connected together so that they can pivot relatively around axes perpendicular to the flat sides of the saw blades. Thus, when the saw is positioned over a tree limb the individual saw blades will inherently assume a position in a plane transverse the axis of the limb with the saw teeth in position to cut through the limb as the saw is pulled back and forth across the limb.

Abstract: There is disclosed a reciprocating chain saw made up of a length of chain formed by a plurality of serially pivotally connected cutters, a number of which cut when the chain is moved in one direction, and a number of which cut when the chain is moved in the other direction. In one use of the chain saw, it is adapted to be connected at its opposite ends to the two branches of a rope or the like, one end of which may be thrown up and around the limb of the tree which is to be cut. The cutting means disclosed are generally similar to those of conventional motor driven chain saws with the exception that no sprocket means need be provided on the chain. In one of the disclosed embodiments of the chain saw of the invention, the chain is so constructed that it can bend or flex in only one direction, so that the disposition of the chain, in the correct position upon a limb to be cut is assured.

Abstract: A saw chain is constructed by a cutter assembly having a first cutter member and a second cutter member arranged sequentially and attached together by an attachment arrangement including a pair of links, a pair of pins, and suitable rollers. The cutter members each include a cutter and a driver, with the latter being receivable in a peripheral groove of a cutter bar. The cutters of each of the cutter members extend away from one another so as to form an alternate bite along the length of the resulting saw chain. The disposition of the cutter members centrally of the links provide improved balance to a saw chain constructed from links according to the invention.

Abstract: The invention concerns a machine for cutting earth formations, of the type comprising a vehicle body, and a power driven rotary cutter mounted on the body. The cutter includes a wheel assembly and a cutter chain mounted in circular fashion around the wheel assembly. The cutter chain comprises a plurality of links connected together by transverse pins, and cutter-receiving sockets carried by the links. The wheel assembly comprises a peripheral surface for supporting the pins, and a plurality of circumferentially spaced recesses in the surface, the quantity and spacing of the recesses corresponding to the quantity and spacing of the transverse pins in the chain such that the pins can be positioned in the recesses. The recesses are of sufficient depth to support the chain in a slackened condition when the pins are positioned in the recesses.

Abstract: A power saw chain comprises a central row of driving links and outer rows of cutting links and side links with each cutting link being laterally aligned with a side link and adjacent a side link longitudinally of the chain. The undersurfaces of said adjacent side links are designed to run on a guide plate surface while the undersurfaces of the cutting links and the laterally aligned side links have clearance from said surface to reduce the vibration effect of the chain.

Abstract: 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 of contact with the solid wood of the tree and is preferably in the form of a driven endless fiber removing chain. As pressure is applied by the spaced shearing edges of shear projections of the blade against the tree, the fiber removing device removes the fibers that are fed into the groove. The removal of fibers greatly reduces the transverse force required by the shear blade to penetrate the tree or bole, and further reduces the resulting longitudinal shearing forces applied to the tree due to the longitudinal compression as the blade moves transversely through the tree thereby minimizing longitudinal splitting of the bole.

Abstract: A saw chain comprising a series of center links and pairs of side links pivotally joined to form a chain. Certain of the side links are cutter links formed without integral depth gauges. The chain further comprises special cam links bearing upstanding cam portions with upwardly and rearwardly inclined forward edges and rearwardly projecting tails. Each cutter link is preceded by a cam link disposed on the opposite side of the chain.

Abstract: A plurality of tubular, spaced apart cutting links are coaxially fastened to a continuous cable and are driven around a plurality of sprockets by a motor driven sprocket. Each cutting link includes cutting teeth at the forward end of the link and a chip or sawdust clearing edge at the rear of the link.

Abstract: The bi-directional saw chain is made up of two links, a cutting link and a connecting link. The cutting link is symmetrical about its vertical center line and includes an L-shaped cutting section having cutting surfaces along both the leading and trailing edges. Legs extend outwardly from the cutting link on either side of the cutting section. These legs terminate in a surface which acts as a depth gauge. Each leg also includes a stop shoulder for engagement with the connecting link. The connecting link includes two offset and parallel sections, each having an outwardly extending flange. The outwardly extending flanges of adjacent connecting links form side by side parallel and spaced flanges which accommodate a perimetric trackway on the saw blade. Each connection is pivotal so that the leading leg acts as the depth gauge and the trailing leg engages the connecting link to form the stop and position the cutting link for proper functioning.