Abstract: A clamp is disclosed for a key making machine. The clamp may have an anvil, and a door movable toward the anvil to sandwich a key blank therebetween. The clamp may also have a gate pivotally connected to the door and configured to engage the key blank.

Abstract: An operator operates a throttle lever and by maximizing the extent of said operation, the drive state is initiated, and the crank shaft rotation rate R increases and reaches the maximal value (RC) thereof. Subsequently, the operator operates the dressing operation lever so as to be in a second state at elapsed time (t0) while keeping the extent of the throttle lever operation maximized. Because a microswitch is turned off, the crank shaft rotation rate (R) is controlled in a range of R1<R<R2. By placing the saw chain in contact with a grindstone fixed to the dressing operation lever simultaneously with said action, dressing work is performed. After the microswitch is turned off at elapsed time (t0), the output of an ignition coil is controlled cyclically by a control unit at a cycle (T1+T2) so as to be on (ignition) during period (T1) and off (flame off) during period (T2).

Abstract: A self-powered chainsaw, typically a battery powered chainsaw, including a housing, a power source, an endless cutting chain having a plurality of cutting elements and a motor arranged to drive the chain relative to the housing using power from the power source. The chainsaw also includes a sharpening element which is arranged so as to be driven relative to the cutting elements and the housing using the power source.

Abstract: A chain sharpening device arranged to sharpen a saw chain. The device comprises a housing (110), arranged to be detachably mounted on the guide bar (3), a sharpening element (140) selectively displaceable relative to the housing between a resting state and a sharpening state, an actuator (150), selectively displaceable between an inactivated state and an activated state, which actuator is connected to the sharpening element and arranged to selectively bring the sharpening element from the resting state to the sharpening state, a first biasing member (160) operatively connected to the actuator and arranged to bias the actuator towards its inactivated state, a second biasing member (170), operatively connected to the sharpening element and arranged to enable relative movement between the actuator and the sharpening element when the sharpening element is in the sharpening state, so as to delimit a force with which the sharpening element (140) can be pressed towards the saw chain.

Abstract: Embodiments provide various components of a chain saw, including saw chain elements, sprockets, and other fixtures, that may facilitate sharpening of cutter links during operation. In various embodiments, the components may increase stability during sharpening, provide nose mounted sharpening fixtures, and/or facilitate the resizing and/or reshaping of a sharpening element.

Abstract: A vibrating chain saw sharpener for sharpening a saw chain that includes a cylindrical body portion; a ring portion connected to and encompassing an intermediate portion of the cylindrical body portion; a flange portion extending away from a bottom portion of the cylindrical body portion; and a hand-held power tool removably connected to an upper portion of the cylindrical body portion. Vibrations transmitted from the hand-held power tool to the ring portion are conveyed to the tooth of the chain saw, wherein the tooth is sharpened by the vibrations conveyed thereto.

Abstract: A chain sharpening device arranged to sharpen a saw chain. The device comprises a housing (110), arranged to be detachably mounted on the guide bar (3), a sharpening element (140) selectively displaceable relative to the housing between a resting state and a sharpening state, an actuator (150), selectively displaceable between an inactivated state and an activated state, which actuator is connected to the sharpening element and arranged to selectively bring the sharpening element from the resting state to the sharpening state, a first biasing member (160) operatively connected to the actuator and arranged to bias the actuator towards its inactivated state, a second biasing member (170), operatively connected to the sharpening element and arranged to enable relative movement between the actuator and the sharpening element when the sharpening element is in the sharpening state, so as to delimit a force with which the sharpening element (140) can be pressed towards the saw chain.

Abstract: A chain saw sharpening device having a generally U-shaped frame defined by an upper web and first and second parallel side walls for overlying the chain and the guide bar of the chain saw. The frame includes an open area near the center of the upper web defining a sharpening area. Clamping screws are associated with the frame to secure the frame to the cutting bar and an additional clamping screw is associated with the frame for engaging the link of the tooth to be sharpened in order to fix its position with respect to the sharpening area of the frame. A rotary burr having an abradant surface is receivable in either of two diagonally disposed, independently removable bore guides for sharpening left-hand and right-hand cutting teeth.

Abstract: A chain saw sharpening device having a generally U-shaped frame defined by an upper web and first and second parallel side walls for overlying the chain and the guide bar of the chain saw. The frame includes an open area near the center of the upper web defining a sharpening area. Clamping screws are associated with the frame to secure the frame to the cutting bar and an additional clamping screw is associated with the frame for engaging the link of the tooth to be sharpened in order to fix its position with respect to the sharpening area of the frame. A rotary burr having an abradant surface is receivable in either of two diagonally disposed, independently removable bore guides for sharpening left-hand and right-hand cutting teeth.

Abstract: An apparatus for filing a saw chain has a guide for a file holder, a file and a saw chain. The saw chain has cutting teeth wherein a depth limiter is arranged leading each cutting tooth. The guide has a placement part, which can be seated on the saw chain, and a carriage. The carriage accommodates the file holder. The carriage is mounted on the placement part in a displaceable manner in a displacement direction transversely to the longitudinal direction of the saw chain. The file holder is guided at an angle to this longitudinal direction and is supported on the cutting tooth to be filed and on the depth limiter. For a guide for the file holder, the carriage has two parallel side guides, which are arranged at a distance from each other, are arranged perpendicularly to the displacement direction, and delimit a receptacle for the file holder.

Abstract: A sharpening device for manually sharpening the cutting teeth of saw chains for chain saws has a frame, which has two head parts (spaced apart from one another and two pairs of guide rods which are, in each case, arranged parallel to one another and to a longitudinal axis and rigidly connect the head parts to one another. Parallel to the longitudinal axis, round files and two file faces are held without play, but exchangeably in the head parts. The pairs of guide rods and the respective associated round files and the respective file faces are arranged rotationally symmetrically with respect to the longitudinal axis.

Abstract: Embodiments provide various components of a chain saw, including saw chain elements, sprockets, and other fixtures, that may facilitate sharpening of cutter links during operation. In various embodiments, the components may increase stability during sharpening, provide nose mounted sharpening fixtures, and/or facilitate the resizing and/or reshaping of a sharpening element.

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 grinder capable of correctly grinding a cutting blade with a simple operation being provided. Two channels which can be replaced from above on a guide bar in alignment with right and left blades of a saw chain are provided in a base body, a grinding stone shaft is provided on the base separated from the channels by the predetermined same distance while inclined by a predetermined angle relative to a parallel direction to the channels, and a disk grinding stone attached to the grinding stone shaft grinds the side blade and the upper blade of the saw chain simultaneously. The grinder is characterized in that the outer wall of the channel is shorter than the inner wall and contact part contacting the guide bar are formed at lower ends of both walls to make the base horizontal.

Abstract: A sharpening device for manually sharpening the cutting teeth of saw chains for chain saws has a frame, which has two head parts (spaced apart from one another and two pairs of guide rods which are, in each case, arranged parallel to one another and to a longitudinal axis and rigidly connect the head parts to one another. Parallel to the longitudinal axis, round files and two file faces are held without play, but exchangeably in the head parts. The pairs of guide rods and the respective associated round files and the respective file faces are arranged rotationally symmetrically with respect to the longitudinal axis.

Abstract: A wiskar for sharpening cutting teeth of a chain provided on a chain bar of a chain saw. A housing is removably attached to the chain bar and includes a recess to receive the wiskar therein. The wiskar includes a first member configured to be operationally engaged by the recess of the housing; and a second member configured to frictionally engage a bottom surface of the cutting teeth. The second member includes a body portion intermediate the opposing ends, wherein opposing ends of the second member each have at least one lobe defined therein. Abrasives are uniformly impregnated throughout the first and second member to sharpen the bottom surface of the cutting teeth. At least the second member is manufactured from a pliable material that erodes due to friction caused by the cutting teeth engaging the lobes of the second member.

Abstract: Embodiments include a sharpening fixture adapted to mount to the nose of a chainsaw guide bar. When mounted, the operator may direct a force towards the guide bar thereby causing a linear directed actuator to move a sharpening element into engagement with cutters of a saw chain to sharpen a cutting edge of the cutters. In various embodiments, the actuator is biased such that when the force is no longer applied, the actuator pulls the sharpening element out of engagement with the cutters.

Abstract: A saw chain sharpening assembly including a support member, a grinding head, a clamping device and a cooling system whereby the saw chain sharpening assembly is adapted to provide a means for efficiently sharpening small and/or large chains.

Abstract: A chain saw sharpening device having a generally U-shaped frame defined by an upper web and first and second parallel side walls for overlying the chain and the guide bar of the chain saw. The frame includes an open area near the center of the upper web defining a sharpening area. Clamping screws are associated with the frame to secure the frame to the cutting bar and an additional clamping screw is associated with the frame for engaging the link of the tooth to be sharpened in order to fix its position with respect to the sharpening area of the frame. A rotary burr having an abradant surface is receivable in either of two diagonally disposed, independently removable bore guides for sharpening left-hand and right-hand cutting teeth.

Abstract: A file guide is provided having a tubular handle, a spindle, and a retainer. The tubular handle has a central bore with an inner bearing surface and an outer gripping surface. The spindle has a cylindrical outer bearing surface configured to mate in complementary, rotatable relation with the inner bearing surface of the handle, a head at a proximal end, a lock portion at a distal end, and a central receptacle configured to receive a file shank.

Abstract: A method and device for grinding a saw chain (26), the saw chain (26) being clamped in a position suitable for grinding. A rotating grinding disc (11) is manually transferred from an inactive position to an active position. Grinding of a cutter link (39) of the saw chain (26) is effected when the grinding disc (11) has assumed its active position. Further, the transfer of the grinding disc (11) from the inactive position to the active position is effected by a rectilinear movement that is carried out by rolling contact.

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 saw chain sharpening assembly including a support member, a grinding head, a clamping device and a cooling system whereby the saw chain sharpening assembly is adapted to provide a means for efficiently sharpening small and/or large chains.

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: Batch casting of rim sprockets for chain saws as particularly applied to larger rim sprockets experience undesired high scrap rate resulting from porosity and chip-out. The solution is to ensure flow of molten steel throughout solidification of the molten steel in the sprocket mold while retaining molten steel portals or gates of a size that permits breakaway of portal stems. Such enhances the cooling rate of the molten steel in the sprocket mold which was found beneficial. The objective of reduced scrap rate is thus accomplished by maintaining a ratio of mass to surface area of the sprockets being cast to no greater than about 4 grams of material to each square inch of surface area and alternatively provide through bores through the rim sprockets which additionally assist in wood chip removal. This design also reduces the material content which reduces the cost and weight of the product.

Abstract: In the manufacture of a link plate for a silent chain, a band of sheet steel is intermittently forwarded to string of punching dies and shaving dies. The band tends to follow a slightly curved path, which causes alignment errors in a conventional punching and shaving operation. However, in this case, each shaving die and its corresponding punching die are disposed in symmetrical relationship with respect to an intermediate position along the path of movement of the band, and the intermediate position coincides with the location at which the deviation of the band. As a result, the shaving dies are more accurately aligned with the punched surfaces produced by the corresponding punching dies.

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.