Abstract: A saw chain includes connecting links and drive links that are mutually connected by rivets in an articulated manner about rivet axes. The rivets project through at least one rivet opening of one connecting link and through a rivet opening of a drive link. At least one rivet has, on one end face thereof, a depression having a depression edge and a depression base surrounded by the depression edge. The distance of the depression edge from a central plane of the saw chain increases at an increasing radial distance from the rivet axis. The distance (e) of the base from the central plane does not increase at any point of the base at an increasing radial distance from the rivet axis. A greatest distance (a) of the base from the rivet axis corresponds to 50% to 100% of half the core diameter (d) of the rivet.

Abstract: Improved chain saws, components for chain saws, methods of making chain saws and components, and methods of using chain saws and components are disclosed. In some embodiments, a chain saw comprises a saw bar and a plurality of links, wherein a first link has a hook that engages a recess of a second link, thereby coupling the first link and the second link and allowing them to articulate without decoupling. The saw bar may have a rail, and the links may have grooves such that the links straddle and ride over the rail. The rail may have a projection and the grooves of the links may have notches accommodating the projection such that the projection prevents dislocation of the links. The links may have conical or pyramidal cutting teeth. The chain may be bidirectional. Robotic and automated operation of saws and other instruments are also disclosed.

Abstract: The invention relates to a chipper chain (10) for a motor-driven chain saw (9) as well as a chain saw having such a chipper chain (10). The chipper chain (10) includes drive links (1), connecting links (2), and cutting links (3). The drive links (1) each have a drive projection (4). The cutting links (3) each have an upper cutting blade (5) and a depth limiter (6) which leads the upper cutting blade (5). The chipper chain (10) has a maximum width (A) which is defined by the upper cutting blades (5), a maximum height (C) which is measured perpendicularly to its longitudinal axis and extends from the drive projection (3) to the upper cutting blade (5), and an average divide (T) predetermined by the average distance of adjacent pivot pins (7). The product of the maximum width (A), the maximum height (C), and the average divide (T) is ?450 mm3. The driving power of the motor-driven chain saw (9) is ?1.0 kW.

Abstract: An invention is disclosed comprising a cutting chain of links that pivot without longitudinal disarticulation, yet are connected without reliance on separate connections. Lateral dislocation of the links of the cutting chain is prevented by placement of the cutting chain in a channel, which guides the cutting chain along its operational path and provides resistance against normal load. The channel may be retractable and/or comprised of lubricious, heat absorbing materials. The blade may be flexible in order to cut a variable kerf. The invention further comprises a power train and drive train, designed to optimize the cutting chain for one of many applications.

Abstract: A cutting chain for cutting concrete and other similar materials having wear and stretch resistant features. In one embodiment, the cutting chain can include chain links having a debris trap for hindering the entry of debris onto bearing surfaces. In one embodiment, side links and a center link can have cooperating members forming a maze-like debris trap and can include a lubricant and/or other barrier material. In a particular arrangement, side links can have annular ribs which can be partially received in annular grooves on a center link to create the maze-like debris trap. In another embodiment, the cutting chain can include chain links having anti-rotation structures to hinder rotation of the fastener relative to the side links. In a particular arrangement, side links can have a protrusion or slot for cooperating with a complementary mating slot or protrusion on the fastener.

Abstract: The disclosure relates to a power tool separation device, in particular a hand-held power tool separation device, comprising at least one cutting unit which comprises at least two interconnected cutter support elements. At least two cutter support elements are interconnected by means of at least one connecting element of the cutting unit, and the connecting element is essentially flush with at least one outer surface of the at least two cutter support elements.

Abstract: A plurality of bushings are coupled to one another via a series of bolts to provide an interlocking, articulating cutter. The bolts have a cylindrical end and a convex end. The convex ends are seated inside a concave socket coupled to the bushings. The cylindrical ends are coupled to a convex nut seated inside another concave socket coupled to an adjacent bushing. The convex ends of the bolts are configured to articulate inside the seat of the concave sockets. A washer may be placed between the bushings to provide a desired amount of flexibility and/or rigidity. The outer surface of the bushing comprises a cutting structure, such as a milled or clad cutting structure.

Abstract: A quick change cutting link of a saw chain for cutting wood comprises a base member adapted to be pivotally connected to other links of the saw chain. The base member comprises a seat surface. A cutting member comprising a “V” notch releasably engages the seat surface of the base member. Attached to the “V” notch is a carbide tip, including a cutting edge. The carbide tip is accurately placed in the “V” notch by mating with a small piece of metal in the “V” notch. The carbide tip is then sinterbrazed to the cutting member. The cutting member and seat surface may also comprise an inverted L-shaped protrusion and the other includes an inverted L-shaped recess for receiving the inverted L-shaped protrusion. The inverted L-shaped protrusion and recess may be designed so as to form a wedge.

Abstract: A cutting link (1) for a saw chain includes a base body (2) and a cutting tooth (3) mounted thereon and made of hard metal. The base body (2) has rivet openings (4) and a recess (6) is formed in the base body (2) for chip removal with the recess (6) being ahead of the cutting tooth (3) in running direction. A connecting leg (8) of the cutting tooth (3) is brought into surface contact laterally of the base body (2) and the cutting tooth (3) is firmly bonded to the base body (2) by brazing. The connecting leg (8) extends so far downwardly that a lower edge (13) thereof lies lower than the recess (6). The connecting leg (8) has an upwardly raised edge (15) in its rearward region opposite the neighboring rivet opening (4).

Abstract: An anti-kickback saw chain including a plurality of links each having an upstream end and a downstream end relative to a direction of travel of the chain is provided. The anti-kickback saw chain comprises a holding link having a first side and a second side, a replaceable tooth adapted to be removably mounted on the downstream end of the holding link, and a safety drive link. The upstream end of the safety drive link is pivotally connected to the downstream end of the first side of the holding link. The safety drive link includes a safety lobe effective to prevent the tooth from being dislodged from the holding link during chain travel, and a substantially flat upper edge.

Abstract: A flexible cutting apparatus can have an alternating arrangement of different links including a cutting link forming a strand or band. The cutting link can be used to cut material with a cutting tool. A connecting link can be used to connect the cutting links. The cutting link can include a link with a cutter that is either part of the link or attached to the link.

Abstract: Safety chain and rotatable devices, used on saws or other machines for cutting or abrading material, include a plurality of holding members on which replaceable teeth are retained. Safety lobes prevent the teeth from being dislodged during operation of the saw. The safety lobes may be disposed on a link located in front of the holding member or disposed on a link located in back of the holding member, or both. The teeth can include sharp edges adapted for cutting various materials including wood, plastic and metal and can be formed with abrasive surfaces for abrading materials including brick and concrete. The teeth are quickly removable from the saw without the need for fasteners. While the teeth may be retained by engagement between the teeth and holding member, the chain and rotatable devices may retain the teeth on the holding members using only the safety lobes or safety surfaces. The rotational device can include two blades each including holding members and safety lobes.

Abstract: A saw chain for a chain saw is disclosed. Embodiments include a drive link that may be used in a saw chain, wherein the drive link includes a tail and a concavity that complements a depth gauge of a trailing cutting link, reducing and/or minimizing the drive link's protrusion into a gullet space of the cutting link. Embodiments of the invention may help improve cutting performance and further help reduce kickback potential.

Abstract: Hardened cutter elements commonly called cutters used in saw chains to act as cutter links. The hardened cutters have hard insets applied and connected to the cutting face of the cutter. The insets are made of a hard, tough material, such as a suitable carbide. Also shown are saw chains having the hardened cutter links with the hard insets. The preferred insets include a rear portion having a semi-cylindrical attachment surface. The attachment surface is configured for attachment to a filed or ground cutting face of a conventional saw chain cutter. A front portion of the inset has a cutting face which is provided with beveled cutting face corners and preferably chamfered edges extending rearwardly from the inset cutting face. Methods of producing the cutters with insets and for producing saw chains with the hardened cutters are also described.

Abstract: A cutting link (1) for a saw chain includes a base body (2) and a cutting tooth (3) mounted thereon and made of hard metal. The base body (2) has rivet openings (4) and a recess (6) is formed in the base body (2) for chip removal with the recess (6) being ahead of the cutting tooth (3) in running direction. A connecting leg (8) of the cutting tooth (3) is brought into surface contact laterally of the base body (2) and the cutting tooth (3) is firmly bonded to the base body (2) by brazing. The connecting leg (8) extends so far downwardly that a lower edge (13) thereof lies lower than the recess (6). The connecting leg (8) has an upwardly raised edge (15) in its rearward region opposite the neighboring rivet opening (4).

Abstract: A quick change cutting link of a saw chain for cutting wood comprises a base member adapted to be pivotally connected to other links of the saw chain. The base member comprises a seat surface. A cutting member comprising a “V” notch releasably engages the seat surface of the base member. Attached to the “V” notch is a carbide tip, including a cutting edge. The carbide tip is accurately placed in the “V” notch by mating with a small piece of metal in the “V” notch. The carbide tip is then sinterbrased to the cutting member. The cutting member and seat surface may also comprise an inverted L-shaped protrusion and the other includes an inverted L-shaped recess for receiving the inverted L-shaped protrusion. The inverted L-shaped protrusion and recess may be designed so as to form a wedge.

Abstract: A saw chain for a power chain saw is provided and is formed of centrally disposed drive links and laterally disposed connecting links. The links have a flat main body which has two rivet openings through which, transverse to the longitudinal direction of the chain, rivet pins extend for a pivotable connection of the links. Some of the connecting links are embodied as cutter links, which have a cutting tooth formed on the main body, whereby at least one depth limiter is disposed in a manner so as to lead each cutting tooth. At least one part of the depth limiter is fixed in position on a chain link that is disposed on the inner side of the cutter link, and that edge of the cutting tooth that is disposed toward the front in a direction of travel extends parallel to that edge of the leading depth limiter that is disposed toward the rear in a direction of travel.

Abstract: A saw wire according to the invention has two parallel wire strings having a number of saw elements evenly distributed along the wire strings. A saw element includes a platform and a cutting plate. The platform has grooves intended to receive respective parallel wire strings and a groove which is open towards the bottom to receive a driving wheel and a pulley.

Abstract: A sawing device and a chain for it, comprising at least two adjacent sequences of connecting links, of which at least some are cutting teeth; and a sequence of drive links fitted between two adjacent connecting link sequences, wherein an opening at the rear end of the drive link is centered at an opening in the front end of the connecting links, wherein an opening in the front end of the drive link is centered at an opening of the rear end of the connecting links, and wherein a binding pin extending through the whole width of the chain is fitted in the openings. To increase the sawing width, a bush ring is fitted between two adjacent connecting link sequences, around the pin, and placed in the opening of the drive link, and on at least one side of said drive link, a collar is fitted whose diameter is formed greater than the opening in said drive link.

Abstract: A cutting member for cutting hard materials such as rock, concrete, etc., includes a support unit in the shape of a wire. The free ends of the wire are joined together to form an endless unit. Cutting elements are provided at regular distances from each other along the full length of the wire. Each cutting element is firmly connected to a cutting element carrier and supported on the wire and at least in the mounted condition is firmly connected to a rider for guidingly engaging a portion of a saw. Driver members are attached to the wire and the cutting element carriers are floatingly supported on the wire in functional engagement with the driver members.

Abstract: A sawing chain for chain saws, having a plurality of chain links which are linked together so as to be mutually pivotable in a common plane of extent and advance (which plane is in the operating plane of the chain) and which links bear cutting elements. To facilitate replacement of damaged individual links, and to simplify the driving and guiding of the chain, the chain links are linked together in succession in a direct intermeshing fashion i.e. not relying on fasteners to mediate the linkage of the successive chain links, along edge surfaces which extend transversely to the common plane of extent and advance (which plane is in the operating plane of the chain), resulting in a chain structure which is resistant to flexure in the direction perpendicular to the plane.

Abstract: A cutting apparatus comprises an endless chain body comprising a plurality of plate-like flaps connected to each other for angular movement in a common plane. Each flap has an end face on an inner peripheral side of the chain body, and at least a part of the flaps having a cutting device at the end face. The apparatus further comprises a plurality of sprockets supporting the chain body in tension, and defining a common plane of cut effected by the combination of the chain body and the sprockets. The chain body is supported by a rigid backplate, of thickness not greater than the thickness of the flaps. It provides a firm support to the rotating chain body to permit sliding movement of the chain body within the common plane of cut.

Abstract: A chain cutter comprises an endless chain body including a plurality of plate-like flaps connected to each other to provide angular movement in a common plane; each of the flaps has an end face on a inner peripheral side of said chain body, and at least a part of said flaps has a cutting device at the end face.

Abstract: A tooth main body defines open ended, crosswise recesses in which cutter elements of lesser width are secured. The cutter elements may be laterally offset from one another and a medial plane of the tooth body for the formation of parallel grooves along a wood panel or other article. Those areas of the recesses not occupied by the cutter elements form gullets into which severed material may pass. The tooth is formed from plate stock to assure uniform tooth thickness which contributes to chain life.

Abstract: A saw chain with drive or center links which have portions projecting downwardly in the chain bottomed by a pair of spaced prongs. These produce a clearing action of debris that may collect in a saw bar groove receiving the prongs. The prongs are separated by an edge expanse which is indented upwardly from the tips of the prongs.

Abstract: A center drive cutter chain for mounting on a cutter bar. The chain comprises center drive cutter links having forward and rearward pivot openings and pairs of oppositely disposed side links pivotally interconnected by pins to the cutter links and alternating non-cutter drive links. The side links each have forward and rearward pivot openings and forward and rearward bar engaging undersides. For the side links following a center drive link, the width of each side link between its forward pivot opening and forward bar engaging underside is less than the width between its rearward pivot opening and rearward bar engaging underside. When the axes of the pins extending through the pivot openings of the cutter links and following side links are substantially in a plane, the forward bar engaging undersides of the side links are spaced apart from the adjacent side rails of the bar.

Abstract: An offset sidebar chain for use in a machine including pairs of offset sidebars having heights perpendicular to the direction of chain travel, when the chain is in use, at least one pair of offset sidebars of the chain having an extended height, and each including a first portion having opposite ends, a forward end adapted to be connected by a chain pin to a preceding pair of sidebars, and a rearward end adapted to be connected by another chain pin to a trailing pair of sidebars and the pair of extended height sidebars including an extended height portion having structure for supporting a tool.

Abstract: A lightweight disposable cutting chain for use with small, compact power supplies comprises in one embodiment a series of links formed of wire. On certain links an end of the wire loop forming the link is cut to form a sharp edge capable of shaving material, such as wood, being cut. The links are arranged so that a narrow kerf is first cut by the links, other links being formed with cutting edges to shave material and widen the kerf. In other embodiments some or all of the links comprise metal plates formed by stamping from sheet metal.

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 mower attachment for use on farm and highway equipment such as tractors. A cutting head assembly is mounted on an extensible boom supported from the tractor. The cutting head assembly can be moved in three dimensions without changing the position of the tractor. The cutting head assembly has a guard for the cutting chain and has a window therein. A door can open and close the window. It is especially useful for cutting brush along fence rows. It can be useful for cutting and trimming trees.

Abstract: A pipe scraping tool for cleaning scale and other deposits from the exterior surfaces of pipes. The tool includes a plurality of inverted "U"-shaped scraper members each of which is carried by one of a series of interconnected hinged links, each link (preferably rectangular in shape) having a straight edge at each end thereof. These straight edges and the type of links used avoid excessive lateral movement of the links. The inverted "U"-shape of the scraper members provides relatively closely spaced cutting edges. The substantial length of the legs of the inverted "U"s helps avoid clogging of the tool by providing substantial exit spaces, for scale and other debris removed from the pipe exterior surfaces, between the cutting edges and the structure supporting those cutting edges, as well as between the cutting edges and the hinges that interconnect the links that carry the scraper members.

Abstract: A saw tool, especially circular saw, having each saw tooth provided with a tapered male projection to accept a removable, disposable socket tooth; socket tooth comprising a cutting bit and a U-shaped casing permanently joined to each other by brazing or welding. After placing the socket tooth onto the projection by hand the tooth is firmly locked when the cutting forces start to act. The socket tooth is removable by tapping in the direction opposite to placing.

Abstract: A cutting element, for use on the cutting member of a variety of cutting machines, particularly for stone cutting machines. The cutting element includes a base member substantially permanently fixable to the cutting member, and a cap member selectively engageable with the base member. The cap member has hooks that mechanically lock the cap member to the base member, so removal of the cap member during cutting is resisted mechanically. The cap member can be moved laterally of the base member for removal; and, a fastener such as a rivet selectively holds the cap member against such lateral motion.

Abstract: A circular saw blade assembly adapted to be secured to a power-driven saw arbor and rotated thereby, which comprises a circular saw blade formed of first and second discs, the discs defining a central bore extending through a medial portion thereof and diverging radially from the medial portion to form a relief opening extending to the peripheral portion of the disc so as to define a chain track peripheral portion, disc connector elements disposed within the relief opening for connecting the first and second discs at a position between the medial portions of the disk and the chain track peripheral portion, and a chain saw having a plurality of cutter elements projected outwardly from one side thereof and a plurality of drive link elements projecting outwardly from an opposite side thereof, the saw chain extendible about the perimeter of the first and second discs such that the drive link elements are disposed within the chain track peripheral portion and frictionally engage the first and second discs defining

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 tool having cutting teeth. The cutting teeth are formed on one end of inserts that are seated in slots provided in the body of the tool with the cutting teeth projected outwardly of the slots. The inserts are produced from a resilient material that is preset in a bowed configuration with the slots having substantially straight side walls. A relief opening is provided in the bottoms of the slots and the seated inserts are forced into an open, substantially straight position with a tail section that curls into the relief opening. Flanges provided on the inserts overlap the edges of one side wall of the slots to resist lateral displacement.

Abstract: A chain saw safety improvement is disclosed. Enclosed in a hollow guide bar is a link positioning device which moves the links on the chain into a cutting or safety position. This device is spring tensioned and normally in the safety position. The chain links themselves are pivotable and scythe-shaped, the tips acting as safety tails. When the link positioning device is in its normal safety position, it pushes the safety tails, moving the links into a noncutting position. When tension is manually released by the operator, the links may move into their cutting position.

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: The invention provides a saw chain comprising connecting links made of relatively inexpensive nonhardened metal and saw tooth links made of an extremely hard material, such as carbide, which maintains the sharpness of the saw tooth links despite prolonged use. The connecting links are pivotally secured through registering apertures in the links. In one form of the invention the pivot pin is separable into a female portion and a male portion to permit the replacement of individual saw tooth links on the saw chain.

Abstract: A support assembly for trencher teeth or other tools including a mounting bracket which is retained on a bracket support by only one retaining pin thereby permitting quick and convenient installation on or detachment from a trencher digging chain. The mounting bracket is constructed for holding a pair of reversible trencher teeth made in accordance with the present invention, each tooth including plural cutting edges. The operator mounts a trencher tooth to one side of the mounting bracket until its forward cutting edge becomes dulled or damaged, and then, reverses the tooth to the opposite side of the bracket for further use. One end of the mounting bracket is formed with a downwardly depending hook-like projection which engages and locks against an end of the bracket support. The opposite end of the mounting bracket abuts against an upstanding vertical projection on the bracket support and is held thereto by a single retaining pin passing through the upstanding projection and into the bracket support.

Abstract: A bag machine for permitting action on multiple widths of web and capable of high speed operation. A rigidifying beam supports the heat seal bar. The heat seal bar is thermally isolated from the beam and the flange of the beam is protected against heat loss. A belt and sprocket assembly that propels a cutter blade across the web path are aligned in a plane set at an angle to the axis of the beam. The sprockets have diameters comparable to the height of the beam and position the cutter blade adjacent the heat seal bar at the lower edge of the beam. The blade is attached by a plate inserted between teeth of the belt with a corresponding tooth omitted from the sprocket. An insulating heat shield also serves to support a protective curtain and a novel lift arrangement is provided for the entire head assembly and upper nip rolls.

Abstract: A percussive tool, such as a tamping tool used with railroad bed tamping apparatus, has a replaceable work bit, such as a tamping foot. The removable tamping foot is secured to a shank by a tapered force fit. A repulsive force is generated between the shank and the tamping foot when it is desired to remove the tamping foot from the shank. Production of the repulsive force is achieved by pumping a fluid into an expandable chamber between the shank and the tamping foot. Preferably, a hand-operated grease gun drives grease into the expandable chamber to produce the repulsive force.

Abstract: A cutting tool such as a circular saw or chain saw is composed of a support having one or more tapped cavities and a cutting element having an elongated threaded shank engaged in the cavity and having an enlarged head at an end of the shank projecting from the cavity.

Abstract: Integrated tie strap and rivet assemblies for saw chains are made by the steps of rough cutting, coning, coining and trimming a length of elongate bar. The integrated tie strap and rivet assemblies thus formed replace the separate tie straps, rivets and concentric shoulders heretofore used in saw chains.

Abstract: The present invention is concerned with a novel and improved cutting mechanism for slicing a flexible sheet that is being advanced endwise continuously to the cutting position. It is particularly advantageous in the slicing of textile materials that are formed continuously as in a carpet making machine, such as those produced by a non-woven bonding procedure described in U.S. Pat. No. 3,657,052.The present invention comprises an endless belt stretched about two sprockets. The cutting elements are secured to the belt at intervals therealong. Supporting guide means are positioned beneath the upper course or stretch of the belt to assure that the cutting edges of the cutting elements carried thereby follow a path lying in the plane of cutting extending transversely of the width of the sheet being sliced. Means is provided to drive the belt alternately in both directions so that these knives can be reciprocated in the plane of cutting.

Abstract: A die cutter for a hay pelleter has a die replaceably mountable on a ring of the pelleter. A sleeve is removably mounted on the die for permitting replacement of the cutting edge of the die cutter without the necessity of dismounting the die from the ring and removing the die to a shop for resharpening. The cutting edge may be replaced by removing the old dull sleeve from the die and mounting on the die a new, sharp sleeve.

Abstract: A saw tooth of truncated rectangular pyramidal configuration, affixed at its smaller base to a saw body; the larger base, facing the work, is of concave configuration in the longitudinal direction, the direction of cutting movement; further, either the end surfaces of the tooth or the larger base surface of the tooth are concave in the transverse direction, affording four cutting points at the corners of the larger base.