Abstract: Disclosed is a blade grinder comprising a blade holder that is mounted so as to be rotatable about a horizontal shaft which is mounted so as to be rotatable about a vertical axis, thus allowing the blade to be optimally adjusted relative to a grinding disk. The grinding disk can preferably be vertically and horizontally moved using spindles. This creates a simple design allowing a lawnmower blade to be ground in a fully automatic manner.

Abstract: A portable sharpening apparatus is described. The sharpening apparatus includes a body portion and a cavity formed in the body portion for receiving an object to be sharpened. A rotatable abrasive drum capable of sharpening and having an axis of rotation is provided and the abrasive drum is located in the body portion. The apparatus further comprises a motor arranged to drive the abrasive drum and a mouth communicating with the abrasive drum and arranged in the body portion so as to direct an object to be sharpened towards the abrasive drum, wherein the mouth has a supporting means for locating an object to be sharpened at the abrasive drum, the supporting means being such that, when in use, an object to be sharpened is orientated along an axis substantially perpendicular to the axis of rotation of the abrasive drum.

Abstract: A blade holding jig arrangement for either grinding or honing a blade including a mounting bracket assembly with an elongate guide bar and a device for rigidly supporting the guide bar. A support arm can be pivotally mounted on the guide bar by means of a tubular support mounted on one end of the arm and extending perpendicular thereto. The guide bar extends through a passageway in the tubular support. The support arm can be moved along the guide bar for grinding. A clamp unit for clamping a blade includes a U-bracket with two legs and two clamping jaws adjustably mounted on the U-bracket between the legs. The clamp unit is attached to an end section of the arm remote from the one end of the arm. The clamping jaws can be moved towards one another in order to clamp the blade.

Abstract: An apparatus is provided for machining workpieces that, when in use, functionally cooperate with each other. The apparatus includes a frame for mounting each of the workpieces, and a machining tool mountable to the frame such that the tool is capable of defined relative movement with respect to the frame. The frame includes one or more adjustable supports for adjusting the position of the workpieces relative to the frame for operative engagement between the tool and the workpieces. The adjustable supports are fixable to maintain the position of one of the workpieces relative to the frame for machining in accordance with the defined relative movement, and the apparatus is adapted to permit the workpiece to be removed and replaced with one of the other workpieces, for machining in accordance with the defined relative movement. A method is also provided.

Abstract: A method and apparatus for sharpening clockwise rotating standard blades, counter-clockwise rotating standard blades and mulching style blades of either clockwise or counter-clockwise rotation is provided. The present invention comprises a base with a blade fixture which is reversible to accommodate both clockwise and counter-clockwise rotating blades. Uprights, a slide shaft, a slide bushing and a handle shaft connected to a disc grinder provide a means for setting a primary cutting angle for sharpening the primary cutting edges of a blade. An adjusting wheel rotatable attached to the handle shaft and pivotably coupled to the disc grinder provide a means for quickly and easily adjusting the cutting angle in order to accommodate sharpening the secondary cutting edges of a mulching style blade and returning the disc grinder back to its original cutting angle.

Abstract: A blade-sharpening machine for sharpening any one of various sizes of rotary blades comprises a drive unit and a universal blade chuck for holding the blade to be sharpened. The drive unit further includes a sharpening assembly that sharpens the blade while the drive unit rotates the blade chuck. The blade chuck includes a chassis and jaws that are circumferentially spaced about the chassis and are shiftably attached thereto for securing the rotary blade. A spring-loaded fastener normally urges the jaws radially inwardly into engagement with the blade. A centrally-positioned cam is operable to shift the jaws simultaneously so that the blade can be selectively secured on the blade chuck.

Abstract: The present invention provides a blade sharpening device designed for sharpening a blade for a uniform sharpening of the edge thereof. Generally, the blade sharpening device includes a base, a guide, a carriage, and a blade holder. The base has a guide movable relative to the base. In one embodiment, the base includes a material that receives an impression of a blade defining a blade contour. A blade holder is attached to the base for securing the blade while being sharpened. The carriage includes a means for interacting with the material of the guide or the carriage to define a sharpening path substantially aligning with the blade contour. The carriage has an abrasive surface for sharpening the blade. In operation, the guide and carriage direct the movement of the abrasive surface along the contour of the blade for a uniform sharpening of the edge thereof.

Abstract: A sharpening guide for use with a chisel and a grinding wheel comprising a rod having a first end and a second end, a pivot assembly carried by the first end, a tool clamp attached to the pivot assembly and movable relative to the rod and adapted to retain the chisel, a base, and a base pivot for movably mounting the rod relative to the base whereby the base pivot is adapted to be mounted adjacent the grinding wheel. A method of sharpening a tool comprising the steps of locating a tool within a tool clamp, rotating the tool clamp toward a grinding wheel about a first axis until the tool is in contact with a grinding wheel, and rotating the tool clamp about a second axis to move the tool across the grinding wheel rotationally.

Abstract: A motorized knife sharpener includes means of for sharpening heavy, medium, and fine blades at angles appropriate to the cutting edges of such blades.

Abstract: A surface treatment method can perform coated surface treatment on a cutting edge R and a rake surface, while maintaining a radius of curvature of the cutting edge R and uniformly surface-treating the rake surface. The surface treatment method includes providing an opening chamfered at comers adjacent to an upper surface of the fixture to the fixture for fixing a coated cutting insert; fixing the coated cutting insert inside the opening in such a manner that a rake surface of the coated cutting insert is disposed lower than upper surfaces of the fixture but higher than a lower edge created on the opening of the fixture by the chamfering; and conducting the surface treatment on a cutting edge R and the rake surface of the coated cutting insert.

Abstract: A device for grinding a cutting tool uses a rotatable grindstone and a tool holder for mounting the cutting tool. The device guides the tool, mounted in the tool holder, along an intended plane, which is tangential to a peripheral surface of the rotatable grindstone, using a practically linear contact between the rotatable grindstone and the cutting tool. By moving the tool holder, with the mounted cutting tool, along the intended plane, this plane is transferred to an unbevelled side of the cutting tool.

Abstract: A knife edge enhancing apparatus includes a support having a support surface and knife blade clamping structure mounted to the support and located above the support surface. An object having a knife edge modifying surface which could be abrasive or non-abrasive is mounted to a holder which is freely slidable on the support surface so that the object surface can be manually moved into contact with a knife edge facet. At least one of the clamping structure and the object surface is angularly adjustable to control the angle of contact of the object surface with the knife edge facet.

Abstract: A double-grinding-wheel type drill bit grinding device with a single driving shaft comprising a power source disposed on a base, two grinding wheels being disposed at opposite ends of the single driving shaft extending out of the power source. The grinding device further comprises two pair of first grinding and second grinding seats, each pair of first and second grinding seats being disposed close to the respective grinding wheels at both ends of the driving shaft, a clamping assembly for clamping a drill bit to support the drill bit upon sequential insertion into one pair of the first and second grinding seats, and a positioning device being disposed on a front surface of the base for providing alignment of the drill bit within the clamping assembly prior to the insertion of the drill bit into one pair of the first and second grinding seats. The power source is a pneumatic motor and is provided with a vacuum passage for facilitating dust discharge.

Abstract: A modified truncated cone-shaped disk is molded onto a plastic hub which is mounted on a motor driven shaft. The hub has an axial bore of a size to fit with very close clearance on the shaft while still permitting the disk to freely slide against a low spring force.

Abstract: The emery wheel grinding machine with adjustable drill bit chuck disclosed herein has an adjustable chuck in which is provided with a T-bushing having an outer flange formed at one end thereof. The outer flange is provided with several pairs of stop traps along its circumference, whereas the number of stop traps are determined according to the number of cutter blades to be shaved. Several stop pins are formed on the surface of the outer flange to control the turning angle of the drill bit or the cutter. The T-bushing further has a taper hole in it. When the chuck head which holds the drill bit or the cutter is inserted into the taper hole, the cutter blade can be in contact with the emery wheel with a certain tilted angle thereby allowing the cutter blades of various length and number to be effectively shaved, ground and finished.

Abstract: A self-centering skate holder for clamping a skate blade from above and below which maintains the blade at a predetermined height and parallelism. A handle is connected with a cable which is taut and extends around the circumference of the upstanding vertical member. The movements of the cable activate cam levers which rotate cams that move a pair of jaws towards or away from each other. The simultaneous movements of the cams ensure that the jaws move in unison and through a similar distance allowing a skate blade of any thickness to be clamped along the desired centerline. In an alternative mechanism, a tie bar extends between the jaws and is operated by a cam to induce equal and opposite movement of the jaws.

Abstract: An apparatus and method are provided for cutting corrugations into the resharpened blade of a scissor. The apparatus comprises a rotatable corrugating wheel. The peripheral annular circumferentially disposed edge of the wheel defines a corrugating surface that is configured to abrade the sharpened edge surface of the scissor blade. The corrugating surface is formed by a substantially uninterrupted ridge that helically winds around the entire circumferential edge of the corrugating wheel wherein adjacent windings of the ridge are separated by a substantially uninterrupted recess that helically winds around the entire circumferential edge of the corrugating wheel. The corrugating surface can be formed in the circumferentially disposed peripheral annular surface of a circular steel disc that has been coated with a fine diamond coating or a fine ceramic coating or a combination of the two.

Abstract: It is to provide a saw chain sharpener such that while a saw chain is clamped at both ends by a holding plate, which is supported forward of a handy type electric motor, so as to stabilize its sharpening posture, a grinding tool such as a round rod-shaped grinding tool or a round rod-shaped grindstone, which is attached to an end of the electric motor, is rotated at a high speed so as to sharpen, at a side thereof, the saw chain efficiently. A support member is projected forward from a sharpener body which is formed such that a round shaft-shaped grinding tool for grinding is attached to an end of a handy type electric motor.

Abstract: A holder, guide, or jig for sharpening tools is disclosed, in which the jig holds and orients a tool to be sharpened to properly align the tool on or against abrasive wheels, discs, or sharpening stones, thereby creating a fine, square, beveled edge on the tool, at a predetermined and accurately reproducible angle.

Abstract: The arrow blade sharpening apparatus is best suited for precision sharpening of arrow blades, Exacto® knife blades, and other like edges which require precision and fine honing. The transparent lidded apparatus is motorized and counter rotates drive gears and then ceramic abrasive wheels with a single motor. The slot of the housing and the guide of the blade holder provide for exact sharpening work without the possibility of angle misalignment of the blade-to-wheel contact.

Abstract: A sharpening apparatus (16) for a blade-like cutting implement. The sharpening apparatus has an elongate body (18) and a cutting edge extending widthwise across one end of the body (11) at a predetermined angle relative to the longitudinal axis of the body (11). The cutting edge is formed by an inclined face formed on one side face of the body. The apparatus includes a cradle (26) for holding a blade-like implement to be sharpened and a mounting body for mounting the cradle (26) relative to a grinding surface. The cradle is mounted on a pair of guide rails (22, 24) for movement along a rectilinear path, the cradle including first and second rail followers slidably connected to a first and second of the guide rails respectively. The cradle (26) includes a seat for locating the blade-like implement at a reselected reference position on the cradle (26) such that the cutting edge of the implement to be sharpened is located parallel to said rectilinear path.

Abstract: A cutting chain bench grinder includes a self-centering vise that centers the cutting chain on an axis of rotation of the vise base. By centering the cutting chain to intersect the vise base axis of rotation, consistent top plate lengths and hook angles can be ground into left and right-hand cutters on a cutting chain. The vise base may also be adjusted horizontally in and out from the grinder base to align the vise base axis of rotation with the axis of rotation of the grinding wheel. The vise base may also be adjusted vertically relative to the vise base to vertically compensate for grinding wheel wear and to control grinding depth. A light tension spring may be used to bias the grinding head in both grinding and dressing positions. A down angle positioner may also be provided that rotates the cutting chain in the vise around a longitudinal centerline of the cutting chain.

Abstract: A machine for machining bandsaw blades. A machining device, a feed device, a workpiece-fixing device and a workpiece guiding device are mounted to a common central machine block. The machining device has a rotatably driven positionable adjustable grinding wheel with the workpiece-guiding device supporting the bandsaw blade and the workpiece-fixing device clamping the blade in position.

Abstract: A grinding apparatus (36) for a paper cutting mechanism (10) is shown and includes a coupler (38), for mounting on an upper rail (14) of the cutting mechanism (10), a motor-driven grinder (40), and an adjustable support (42) for adjustably positioning the motor-driven grinder (40) in the direction of the rail (14).

Abstract: A sharpening apparatus for razors includes a blade sharpener rotatably supported within a housing and driven by mechanical activation or by a motor. An opening in the housing provides access to the blade sharpener for a blade head of a razor containing one or more blades. The rotatably supported blade sharpener includes at least one flexible sharpening strip on a body, the sharpening strip presenting an abrasive outer surface for contacting the blades. The sharpening apparatus can also include a spring loaded clamping plate for retaining the blade head in the opening.

Abstract: A sharpening guide for a dental tool is provided, with the dental tool having a handle, a working portion, and a shank extending between the handle and the working portion.

Abstract: A knife sharpener includes a housing having one or more access slots for receiving knife blades to be sharpened, one or more grinding wheels rotatably received in the housing and disposed close to the access slots of the housing for grinding and sharpening the cutting edges of the knife blades. The housing includes one or more openings formed in either or both of the end portions of the access slot of the housing and communicating with the access slot of the housing, and having a width greater than that of the end portions of the access slot of the housing, for receiving and preventing the cutting edge of the knife blade from being blunted by the housing after sharpened by the grinding wheel.

Abstract: A sharpener for blades comprises a physical structure supporting at least one abrasive surface. A displaceable guiding plate having an integral linear structural feature of the support is disposed toward one side of the abrasive surface. The linear structural feature provides sliding contact with a face of the blade to establish the relative angle of the plane of the edge facet of the blade with the plane of the abrasive surface at the point of mutual contact as the facet is guided into contact with the abrasive surface.

Abstract: A finishing apparatus modifies the physical structure along the edge of a metal knife blade wherein the edge is formed at the junction of two edge facets presharpened with abrasives. The finishing apparatus consists of at least one precision angular knife guide that positions the edge of the blade into contact with the rigid surface of a driven moving member and positions the plane of the adjacent edge facet at a precise predetermined angle relative to the plane of the rigid surface that is harder than the metal of the knife and is without tendency to abrade.

Abstract: An electronic hollow grinder bevel angle indicator wherein a microprocessor calculates the grinding bevel angle that will be obtained when a tool is placed flat upon a tool rest and presented to the periphery of a rotating grinding wheel. The calculated bevel angle is the acute angle of intersection between the tool rest plane and a plane tangent to the grinding wheel periphery at the line of intersection between the grinding wheel periphery and the tool rest plane. The microprocessor also calculates the air-gap between the tool rest and grinding wheel, and warns the operator when the air gap exceeds a specified safety threshold.

Abstract: A dental tool sharpener is disclosed having a base. A grinding surface is rotatably attached to the base about a fixed axis, the axis of rotation being perpendicular to the base. a positioner is attached to the base and aligns a top face of a blade of a dental tool such that the top face is substantially perpendicular to the axis of rotation of the grinding surface. A gripper is attached to the base for grasping the dental tool and for transporting the dental tool from the positioner to the grinding surface while maintaining the top face substantially perpendicular to the axis of rotation of the grinding surface.

Abstract: The present invention relates to an electric sharpening machine for chain saws capable of correctly sharpening the teeth at any number of desired cutting angles within a given range; this system according to the invention allows rotation of an upper portion of the saw, including the motor and the grinding wheel. The chain to be sharpened can be progressed and automatically gripped by the lowering of the grinding wheel into a grinding position. The chain may be turned 180° for grinding opposing teeth when the upper part is rotated into a complimentary position. In this way it is possible to let the abrasive grinding wheel sharpen the saw teeth, both in case of left and right teeth, with rotation occurring towards the inner part of the teeth and opposite to the position of the operator for avoiding ejecting dangerous sparks and materials at the operator.

Abstract: A movable frame assembly to move a device for dressing a grinding wheel for the sharpening an ice skate blade. The device uses a housing surrounding a grinding wheel and movable frame with a swing arm. A dressing tool is mounted in the dresser swing arm and the dresser swing arm is rotatable between a storage position and an operating position. The movable frame assembly slides along rails to allow positioning of the dressing tool into the grinding wheel. Horizontally and vertically disposed bearings are positioned beside and under a rail with resiliently biased bearings are held against the top of the rail. The bearings help the rails of the movable frame move smoothly. The rails are spaced apart by yokes on the arm or a bar across the top of the dresser to prevent binding as the movable frame is slid for dressing the wheel. Adjustment of the rails is also provided for by adjustment slots at the back of the rails.

Abstract: An improved hollow grinder bevel angle control wherein a height-attitude coupling mechanism links the height and attitude motions of an adjustable tool-rest, and a scale on a stationary portion of the grinder cooperates with a pointer on the height-attitude coupling mechanism to indicate a relationship between bevel angle and grinding wheel radius. The coupling mechanism is implemented with a linkage mechanism that provides a wide range of tool-rest adjustment, subject to the height-attitude relationship defined by the linkage. The pointer is mounted for rotation with the linkage mechanism about its fixed pivot point, and is user-adjustable so that a dimension from the fixed pivot point to the tip of the pointer coincides with the radius of the grinder wheel. The bevel angle scale is stationary with respect to movement of the linkage mechanism, and arranged so that the tip of the pointer sweeps across the scale as the linkage mechanism is adjusted through its full range of movement.

Abstract: A method of sharpening bedknives for reel type mowers by installing sets of locator surfaces in a bedknife grinder, grinding the surfaces with the grinder to be aligned and parallel, installing a bedknife located against surfaces in both sets, and electromagnetically locking the bedknife in position while grinding the edge to be sharpened. The bedknife is adjusted to be aligned with the reel blades by adjusting the bedknife pivots in the mower.

Abstract: A grinding machine for sharpening the blades of a mower. The grinding machine includes a lifting system for raising the mowing machine onto an operating platform where the blades are sharpened. A rotationally driven grinding wheel traverses its drive shaft in a controlled manner for sharpening each blade. A remotely mounted motor is coupled, by means of a flexible link and a motor coupling, to the mower's blade cylinder for rotating the blade cylinder during sharpening. The motor coupling is mounted to an adjustable mounting assembly for adjustment of the grinding machine to a variety of mower sizes and configurations. The lifting system includes a hydraulic cylinder which, upon extension, engages a drive chain to raise a lifting platform.

Abstract: A honing process for a long knife blade such as that used in chipping wood products comprises two honing bodies each formed by a shaft carrying three honing discs with the shafts spaced by a distance less than the radius of the discs so the discs interleave and are spaced along each shaft by a distance substantially equal to the width of the discs so that the side edges of the discs lie immediately adjacent. The discs are rotated in directions so they move into the cusp formed between the discs. The long knife blade is inserted into the line of the cusp which lies parallel to the axes of rotation of the honing bodies and is moved back and forth along that line in a honing action. The length of the knife blade is greater than the width of the discs and generally significantly greater than at least two of the discs so that the knife blade remains bridged across the discs during the movement.

Abstract: The invention provides a novel cutting tool used in wood working, which has a sufficiently thick cutting edge allowing stable cutting of a veneer from a log as well as an apparatus for and a method of grinding the cutting edge to have a favorable shape and a relatively large angle. The apparatus of the invention includes a table which an elongated cutting tool extending along a longitudinal axis of the table is mounted on, a fixing element for pressing the cutting tool upright against an upright plate, and a carriage which is reciprocatingly movable along the longitudinal axis of the table. The carriage is provided with a pair of grinding wheels which are respectively movable into and out of endwise grinding contact with an upper surface and a lower surface of the cutting edge of the upright cutting tool at desirable angles.

Abstract: An apparatus for grinding a blade used in, for example, a glass or hedge trimmer including grinder support and a blade mount provided close to each other. The grinder support holds a grinder, which has a round grindstone, in such a manner that the grinding surface of the grindstone can be oriented not only horizontally and vertically but also in an inclined direction so as to meet the action angle of the tooth of the blade; and the blade mount includes a horizontal surface section and a sloped surface section so that the trimmer blade is place thereon when ground by the grindstone held on the grinder support.

Abstract: A device for accurately locating the blade of a skate mounted in a skate holder so that it may be ground correctly. The device includes a base block mounted to a base of a skate sharpener, a lever pivotally mounted to the block, the block having a blade contacting surface which is substantially perpendicular to the sharpener base, a deflection gauge for measuring the deflection of the lever from a neutral position. A pivotal axis of the lever is parallel to a plane through grinder wheel and parallel to the sharpener base.

Abstract: This invention relates to a knife sharpener and more particularly to a knife sharpening device wherein the knife is clamped in a fixed position on a table or platform and the knife sharpening or grinding device is moved along the edge of the knife to be sharpened. The knife sharpening or grinding device is clamped into an adjustable arm which is attached to a roller. The roller slides along a track formed in the table or platform which has the identical configuration as the knife blade. Therefore, the edge of the sharpener or grinding device is maintained in constant contact with the edge of the knife during the sharpening. This prevents the problem of knives being sharpened unevenly and inaccurately, as is often seen in conventional knife sharpening methods.

Abstract: A method of sharpening bedknives for reel type mowers by installing sets of locator surfaces in a bedknife grinder, grinding the surfaces with the grinder to be aligned and parallel, installing a bedknife located against surfaces in both sets, and electromagnetically locking the bedknife in position while grinding the edge to be sharpened. The bedknife is adjusted to be aligned with the reel blades by adjusting the bedknife pivots in the mower.