Abstract: A portable sharpener for chains of chainsaws comprising sharpening means (2) and a coupling device (3). The sharpening means (2) are configured to sharpen the teeth (102) of a chain (101) of a chainsaw. The coupling device (3) supports the sharpening means (2) and is configured to be reversibly constrained to the chainsaw. Furthermore, the coupling device (3) comprises a support structure (4) which has a first plate (4a) adapted to be arranged parallel to a main extension plane of a chain guide bar (100) of the chainsaw and a second plate (4b) configured to abut against the bar (100), in such a way as to be at least partly interposed between the bar and the chain (101). The first and the second plate (4b) are arranged substantially in an L-configuration. The coupling structure further comprises one or more attachment members (5) applied to the first plate (4a) and configured to constrain the support structure (4) to the bar (100) of the chainsaw.

Abstract: The present general inventive concept is directed to a chainsaw sharpening device including a cutting tooth sharpener, a base coupled to the cutting tooth sharpener, a first side member coupled to the base and configured to face a first side of a chainsaw bar, a second side member coupled to the base and configured to face a second side of the chainsaw bar, and a guide member coupled to the base and configured to be slidable along a plurality of top plates of a respective plurality of cutting teeth of a saw chain mounted on the chainsaw bar, wherein the chainsaw sharpening device is configured to be moved to a desired cutting tooth of the mounted saw chain to perform a sharpening procedure without being fixed to the chainsaw bar.

Abstract: A sharpening device for power chain saws, comprising a chain clamping unit and an advance element for advancing the saw chain. The chain clamping unit and the advance element are arranged on a base plate. In a given arrangement, the chain clamping unit and the advance element can be arranged on the base plate and different base plates having elements arranged thereon can be used for sharpening different power chain saws.

Abstract: A saw blade insert (12) comprises a body (12?) of hard material. The body (12?) is fixable to an edge of a gullet of a saw blade. The insert (12) has a concave surface profile (23) which, in use, is forward facing relative to the cutting direction of the saw blade. The profile (23) can be curved or angular such as a shallow “U” shape with flat surfaces (43) which extend inwardly from sides (22) to a central longitudinal floor (44).

Abstract: A device for sharpening chain saw teeth, in particular a chain saw which is portable and applicable in the field, and where the chain is not to be taken off the chain saw blade when sharpened enables swinging of a grinding wheel (16) transversally to each tooth (8) of a chain (7) resulting in straight cutting faces of each tooth (8). The grinding wheel (16) of the relatively small diameter is rotated by an actuator (15) of the suitably small power and high number of the revolutions resulting in high cutting speed. Said actuator (15) can be either an electric motor, supplied with electricity from electric mains or a battery, a pneumatic motor or a hydraulic motor.

Abstract: A band saw profiling machine includes an indexing mechanism having a feed finger mechanically linked to a caliper finger for reciprocating movement therewith. The caliper finger is urged toward the feed finger during an indexing movement of the indexing mechanism to measure the spacing between adjacent teeth of a band saw blade on-the-fly and concurrently with advancement and sharpening of the saw blade. The tooth spacing measurement is then used in the band saw sharpening machine to provide feedback for a subsequent indexing movement of the indexing mechanism, to accurately position the band saw blade for sharpening of a row of teeth. A control unit of the sharpening machine accepts input of shape factors from an operator that define the pattern of motion of the indexing mechanism, the grinding wheel, or both, for sharpening of irregular tooth shapes.

Abstract: A computer-controlled band saw sharpener employing electrically powered, X and Y axis drivers, each having a reciprocating element. The X-axis driver actuates a feed finger mechanism, to index the saw in repetitive, stepped fashion, while each tooth is successively ground. In concert with the X-axis driver, the Y axis driver repetitively lowers and raises a grinding head, provided with a rotary grinding wheel. Both the X and Y axis drivers include servomotors to rotate the shaft of an elongated ball screw. A carrier box houses a non-rotatable ball screw nut. The nut travels back and forth along the ball screw shaft in accordance with its direction and extent of rotation. Drive arms for the feed finger mechanism and the grinding head mechanism are bolted at their lower ends to a threaded bushing in the nut carrier box. The computerized controller is programmable, to produce virtually any desired tooth shape in the saw.

Abstract: A computer-controlled band saw sharpener employing electrically powered, X and Y axis drivers, each having a reciprocating element. The X-axis driver actuates a feed finger mechanism, to index the saw in repetitive, stepped fashion, while each tooth is successively ground. In concert with the X-axis driver, the Y axis driver repetitively lowers and raises a grinding head, provided with a rotary grinding wheel. Both the X and Y axis drivers include servomotors to rotate the shaft of an elongated ball screw. A carrier box houses a non-rotatable ball screw nut. The nut travels back and forth along the ball screw shaft in accordance with its direction and extent of rotation. Drive arms for the feed finger mechanism and the grinding head mechanism are bolted at their lower ends to a threaded bushing in the nut carrier box. The computerized controller is programmable, to produce virtually any desired tooth shape in the saw.

Abstract: A computer-controlled band saw sharpener employing electrically powered. X and Y axis drivers, each having a reciprocating element. The X-axis driver actuates a feed finger mechanism, to index the saw in repetitive, stepped fashion, while each tooth is successively ground. In concert with the X-axis driver, the Y axis driver repetitively lowers and raises a grinding head, provided with a rotary grinding wheel. Both the X and Y axis drivers include servomotors to rotate the shaft of an elongated ball screw. A carrier box houses a non-rotatable ball screw nut. The nut travels back and forth along the ball screw shaft in accordance with its direction and extent of rotation. Drive arms for the feed finger mechanism and the grinding head mechanism are bolted at their lower ends to a threaded bushing in the nut carrier box. The computerized controller is programmable, to produce virtually any desired tooth shape in the saw.

Abstract: A tool head (46) in which a tool spindle (52), adapted to be equipped with a disc-shaped tool (100), is supported so as to be driven in rotation about a spindle axis (C), is associated with a workpiece support (82) on which a workpiece (10) can be arranged such that the tooth tip (18) of a cutting tooth (12) to be machined will lie on a stationary reference axis (A). The tool head (46) is movably supported by means of a reciprocating slide (34) which is movable back and forth along a reciprocating slide guide means (32) transversely of the reference axis (A), by means of a feed slide (24) adapted to be advanced along a feed slide guide means (22) transversely of the reciprocating slide guide means (32), and by means of a a pivot bearing means (42) defining a pivot axis (B) parallel to the reciprocating slide guide means (32).

Abstract: A machine for use in the manufacture of saw blades includes apparatus for performing a plurality of machining operations on the tips of individual teeth of the saw blades. Each tip to be machined is positioned in turn at a point coincident with a horizontal axis X normal to the body of the saw blade. The machine includes a main frame having a pivot coincident with the axis X. The front face and top face are machined by apparatus supported on a first yoke mounted on the pivot and situated to the right of a vertical plane containing the axis X. All other apparatus for machining other aspects of the blade tip including the side faces, steel relief, face profiling, grooving, bevelling, quill grinding, etc., are supported on a second yoke mounted on the pivot and situated to the left of the vertical plane containing the axis X.

Abstract: A saw blade sharpening apparatus for sharpening an elongated blade having a plurality of aligned cutting teeth. The apparatus includes a grinder mechanism to sharpen the teeth. The grinder includes a body and a rotating grindstone, the grindstone having an axis aligned with the blade. The rotating grindstone continuously circulates in a rotational pattern to move the grindstone across the surface of one of the teeth to grind the entire surface of the tooth. At the same time, the rotating grindstone advances the blade linearly from the tooth being ground to the next tooth in succession.

Abstract: A sharpening apparatus (10) is disclosed. The apparatus (10) has a pivot arm (18) for pivotal movement about shaft (21) extending transversely of the apparatus.

Abstract: An arrangement in automatic saw chain grinders of the kind which includes a mechanism (30, 47) for feeding the cutter links (36) of a saw chain (22) to be ground to a predetermined grinding location on a chain support (14), and also a movable grinding machine (18, 19) for grinding the cutting edge (53) of a cutter link (36) present in the grinding location. The grinding location is defined by a chain feed and/or stop finger (46) against which the rear edge (40) of the cutter link (36) abuts in the grinding location. The feed mechanism (30, 47) includes a rotating or indexing saw-chain drive which is driven by an electric motor (32).

Abstract: To gain access to the cutting edge of a saw tooth in the direction of both the back and the front face of a tooth in a single grinding process, the grinding tools (27,37) are adjustable in relation to both their respective pivoted arms (2,3) and with them relative to the machine frame (11,12). Only the primary pivoted arm (2) is driven up and down by a drive (43), pivoting the secondary arm (3) with it by a drive joint (6). Because the pivot axes of pivoted arms (2,3) are not parallel, a universal coupling (6) must be used. This drive joint (6) is offset relative to the pivot axles (32) upwardly from the saw-blade guide (13) in the plane (14) of the saw-blade. Thereby with an otherwise identical device wide or larger-diameter saw blades can be ground.

Abstract: A disc-shaped rotatable grinding wheel has association with a saw chain holder such that in the support of a chain thereon oppositely facing cutter elements can be ground at the same point on the grinding wheel. The saw chain holder has a pivotal mounting for positioning the saw chain at the same point on the wheel for the oppositely facing cutter elements. Various adjustments are included in the structure for positioning the chain in place and for limiting the position of grinding structure.

Abstract: The device is mounted on a support plate (3) by means of vice (1) formed by gripping jaws (23). The rotating grinding wheel (6) driven by its motor is carried by an arm swivelling on a pivot (5) and may be displaced longitudinally, as well as vertically and may be displaced angularly in both directions with respect to the chain (4) to be sharpened. The sharpening of the chain's teeth (7) is effected by the grinding wheel (6) after locking the chain with the vice (1). In this manner the teeth of the chain may be sharpened without removing the chain from the saw.

Abstract: A saw chain grinding machine (10) is provided for sharpening a cutter link (56) of a saw chain (24). A grinding wheel (20) is swingable into position for grinding. A chain carriage (48) then brings the cutter link (56) into engagement with the grinding wheel (20). The chain carriage (48) has a base portion (12) mounted to the machine with the base portion having a pair of upwardly extending vertical supports (72, 74). A guide bar (76) spans the distance between them. The carriage housing (49) is mounted to the guide bar (76) by a plurality of rollers (78, 80, 82, 84, 86, 88, 90, 92, 94) which permit the housing to freely roll along the bar. Movement of the housing (49) is controlled by a control cable (98) that is operable to move the housing and thus the cutter link against the grinding wheel (20).

Abstract: A chain of a chain saw whose teeth are to be sharpened is mounted in a track (4) of a support table so that it can be indexed to a central cutting station whereupon a ram (12) will be acuated to reduce the width of the track (4) and grip the chain. A cutting device will then be lowered into contact with a tooth on the chain so as to sharpen that tooth. When the ram (12) is moved to the open condition the chain is indexed forward again by rotating a pusher arm (8) about a pin (9) while the pin carried on its own arm is driven in a forward direction. This causes an angled forked plate (10) to engage behind a tooth facing in one direction only (of the two possible directions). As the pusher (8) is moved back again a pin (29) rides up over a latch (30) onto the top face of the cam (31) so that the plate (10) can ride over the top of subsequent teeth carried by the chain.

Abstract: A saw chain sharpener for sharpening the left hand and right hand cutting teeth and the rakers of a saw chain while the chain is mounted in situ on a saw bar. The apparatus includes a base, a saw bar clamp mounted on the base for clamping a saw bar in a substantially vertical position. A grinding assembly including an electric motor and a grinding wheel is mounted respectively on first or second grinding assembly mounting posts. The mounting posts are secured on opposite sides of the saw bar clamp. The apparatus also includes an indexing device mounted on the bar clamp and which is spaced from the grinding surface of the grinding wheel when the grinding wheel is pivoted into the grinding position for selective supporting engagement with the rear edges of the saw chain cutting links. The saw chain can therefore move forwardly but not rearwardly when the indexing tooth is in position. The indexing device is adjustable to determine the lengths to which the cutting teeth are to be ground.

Abstract: A grinding machine for grinding the cutters in left- and right-hand cutter links in saw chain. A pair of grinding wheel assemblies disposed on opposite sides of a saw chain support are actuated in turns to bring the wheels in the assemblies into a cutter link positioned on the saw chain support. Indexing structure positions the saw chain with a cutter link occupying a grinding station while supported on the chain support.

Abstract: A generally horizontal elongated mount is provided having structure on one end for supportive anchoring from one marginal edge portion of a workbench with the other end portion of the mount projecting outwardly of the bench marginal edge portion. A depending support leg is carried by the mount spaced intermediate the opposite ends thereof and the lower end of the leg is adjustably extendible for supportive engagement from a floor surface. A support shaft generally parallels the mount and is supported therefrom for adjustable angular displacement relative thereto about the longitudinal axis of the shaft and the end of the shaft corresponding to the one end of the mount oscillatably supports one end of a swing arm therefrom for angular displacement relative to the shaft about an axis transverse to the swing arm and the shaft and angularly adjustable with the shaft.

Abstract: A sawtooth grinding machine has a single pivotally mounted grinding head for grinding both the face and back of teeth, such as in a circular saw blade. The grinding wheel is a composite member formed of a disk wheel and a cup wheel. The disk wheel is shaped to fit into narrow gaps between teeth when grinding the face of a tooth. The cup wheel has a smaller diameter than the disk wheel and has an abrasion-coated ring on its outer circumference for grinding the back of a tooth. A spindle shaft mounts the grinding wheel on the grinding head. The angular displacement of the grinding head for different grinding positions can be reduced as compared to known arrangements. The grinding head is supported for translatory movement in two directions extending perpendicularly of one another and also for rotation about two axes disposed at right angles to one another.

Abstract: An improved saw chain depth gauge grinder longitudinally positions the cutter links of saw chains with their depth gauges in a grinding position for grinding while preventing contact with other portions of the cutter link as they pass through the grinding position. A sprocket rotatably supports the saw chain beneath the grinding wheel. The grinding wheel is raised and lowered to a predetermined position to grind successive depth gauges to a uniform height as the saw chain circulates around the sprocket. One embodiment provides for a multiple-lobed camming member rotationally mounted on the sprocket for actuating a linkage to raise and lower the grinding wheel as the sprocket turns. Another embodiment provides for a pawl positioned adjacent the upper sprocket so as to provide a cutter link stop to position the depth gauge in the grinding position. The pawl also serves as a safety.

Abstract: A portable saw chain sharpener which permits sharpening of the cutter elements of the saw chain without removal of the saw chain from the saw bar. A frame of the sharpener may be attached to the bar of a chain saw by means of a clamp which is adjustable to properly locate the sharpener with respect to chain saw bars of different thicknesses. A motor-driven rotating abrasive disc is adjustably mounted on a portion of the sharpener which is movable with respect to the frame between positions of engagement and non-engagement with saw chain cutter elements. Adjusting screws are provided to separately control bevel depth and bevel angle and to control the position of each individual cutter during sharpening thereof. A releaseable clamp permits a mounting plate to be rotated with respect to a baseplate to directly adjust abrasive wheel position for sharpening cutters at various hook and between positions for sharpening left-hand cutters and right-hand cutters.

Abstract: Grinding apparatus which includes a clamp for holding an article to be ground. The clamp is swung, in orbital fashion, to move the clamp from a position located under a lower edge portion of a grinding wheel located on one side of the wheel's rotation axis, to a position located under a lower edge portion of the grinding wheel located on the opposite side of the wheel's rotation axis. In the sharpening of saw chain, the clamp is used in holding chain during the sharpening of cutter links of one hand when occupying one position, and is used in holding chain during the sharpening of cutter links of opposite hand when occupying its outer position.

Abstract: A chain saw work holder designed to horizontally support an entire chain saw, and a portable adapter designed to support said work holder securely and removably while balancing a pivotal rocking tool on a vertical plane in close proximity thereto. Said work holder is composed of a base on which is secured an elongated beam supporting a pivotal deck equipped with two risers. Each riser is supplied with pins to receive rotatable races for securing, movably taught, a chain saw of any size or length. A unique channel morticed into the center of the back riser at an eccentric angle, and releasably lockable to said deck, enables said back riser to adjust to any length of saw chain. A hinged block on each side of said base allows the deck to tilt to right or left and combines with the lateral mobility of the work holder on the adapter to orient a cutting link of a chain saw elevationally, angularly, and laterally, to the vertically disposed cutting element of a pivotal rocking tool.

Abstract: A sharpening machine for sharpening toothed saws comprises a support for a saw blade supporting the blade for rotary adjustment in a direction of feed. A carrier is mounted for rotation about a tilting axis. A lifting carriage is mounted on the carrier. A spindle head is mounted on the lifting carriage. A grinding wheel is rotatably mounted in the spindle head. The lifting carriage is mounted to the carrier for swiveling movement about a swiveling axis which intersects the axis of the spindle head. The lifting carriage is rotatable at least 180.degree. from a standard position in which the spindle head axis is located in or parallel to the plane of the saw blade. The tilting axis of the carrier is oriented perpendicular relative to a plane containing both the spindle head axis and the swiveling axis. The carrier is rotatable in a range of at least 90.degree. about the tilting axis.

Abstract: A support is provided and a rotary grinding head is journaled from the support for rotation about a first predetermined axis. A support arm is pivotally mounted at one end from the support for swinging of the support and support arm about a second axis substantially paralleling the first axis and the other free end portion of the support arm includes structure for supporting a saw chain therefrom for successive positioning of the cutting teeth of the chain in predetermined position for sharpening by the grinding wheel. As a result of relative swinging of the support and the support arm, the rotary grinding head is swingable into registry opposite side portions of the supported saw chain. Also, a chain tooth engaging and positioning member is supported from the support arm for establishing the predetermined position of the tooth to be sharpened and is swingable into and out of an operative position.

Abstract: A dual side saw tooth grinding machine with power-driven grinding wheel assemblies mounted on pivoted supporting arms organized so that edge portions of grinding wheels in the assemblies are moved in sweeps across opposite sides of a tip in a saw tooth when grinding the same.

Abstract: According to this invention, two band saw grinder units are constructed in paired relationship, spaced apart, and arranged to receive two band saw bands suspended from overhead supports which will permit the bands to move up and down for the grinding operation instead of horizontal as in the prior art. The grinder units are controlled and powered from a central mechanism located in the area between the units, while the bands are supported in an area outward from the area occupied by the central control mechanism, avoiding conflicting occupancy of the various parts. Novel construction and improved means for adjusting the linkage required for accurate grinding of one or two blades at a time are outstanding features of the invention.

Abstract: A sharpening apparatus for circular saw blades including a bench holding a saw clamping arbor mounted on a saw holding table, and a rocker arm carrying a cutting disc. The rocker arm is freely balanced and the saw arbor is freely rotatable so that the cutting disc can be easily tilted to the saw and the blade can be easily indexed to the next cutting tooth.

Abstract: A grinding machine having a base on which is mounted a work piece support and a grinding wheel assembly including a rotatable grinding wheel. The grinding wheel assembly is provided with adjustment mechanisms to enable the grinding wheel to be pivotally adjustable about both horizontal and vertical axes; arcuately movable in a direction which is parallel to or included within a plane containing the plane of rotation of the grinding wheel; and moved along an axis which is parallel to the rotational axis of the grinding wheel. The work piece support is also pivotally adjustable about a vertical axis and is adjustably movable along its vertical axis so that for example the teeth of a circular saw blade forming the work piece and mounted on said support can be ground by the machine.