Abstract: An accessory for a power tool, includes a mounting portion configured to mate with an oscillating drive member of a power tool. A support arm portion extends from the mounting portion in a first direction. The support arm portion includes an inner edge that faces in a second direction transverse to the first direction. A blade portion extends from the support arm generally in the second direction. The blade portion includes a trailing edge arranged facing generally toward the mounting portion and a leading edge arranged facing generally away from the mounting portion. The trailing edge and the leading edge portion meet to define a pointed tip portion.

Abstract: A power tool has a driving shaft driving a working element, a fastening piece fastening the working element to the driving shaft having a projecting shaft insertable into the driving shaft, a locking assembly locking the projecting shaft in the driving shaft having a locking member wherein the locking member has a locking position for locking the projecting shaft with the driving shaft and a loosening position for loosening the projecting shaft with the driving shaft. At the locking position, the fastening piece is pressed towards an end portion of the driving shaft by an elastic component. The locking assembly further includes a movable member arranged outside of the driving shaft, the movable member having a first portion and a second portion which can be directly or indirectly mated with the locking member wherein a radial distance of the first portion relative to a shaft center of the driving shaft is unequal to that of the second portion relative to the shaft center of the driving shaft.

Abstract: A clamp arrangement for releasably securing an accessory to an oscillating power tool can include a tool body including a motor that drives an output member. A clamp assembly can include a first clamp member that moves relative to the accessory between a closed position wherein the clamp assembly retains the accessory and an open position wherein the first clamp member of the clamp assembly is offset from the accessory permitting removal of the accessory from the clamp assembly. A lever can have a user engagement portion and a pivot portion including a pivot axle. The lever can be pivotally coupled to the tool body about the pivot axle between a first position, wherein the clamp assembly is in the closed position and a second position wherein movement of the user engagement portion of the lever causes the clamp assembly to be moved to the open position.

Abstract: An accessory for coupling to an attachment mechanism of an oscillating power tool includes a working end, an opposite rear end, and a fitment portion adjacent the rear end portion. The fitment portion includes a generally U-shaped opening having a central portion and a rearward portion open to the rear end, and configured to receive a post of a tool clamping mechanism. The fitment portion further includes a first plurality of openings in communication with and extending radially outward from the central portion, a second plurality of openings not in communication with and positioned radially outward from the central portion. The central portion, the first plurality of openings, and the second plurality of openings are configured to couple the fitment portion to a plurality of different configurations of attachment mechanisms for oscillating power tools.

Abstract: An adaptor for adapting a working element to an end of a power tool shaft. The adaptor includes a central hole passing through the adaptor and has a longitudinal axis, a driving end facing the end of the shaft, and a tool end facing the working element and having a protruding portion, wherein the driving end is provided with grooves, the grooves and bosses formed between the grooves are alternately arranged around the circumference of the driving end, and the bosses have side faces each facing the central hole and located on a plane passing through an edge of a regular polygon and parallel with the longitudinal axis. The adaptor can thus be used to adapt different kinds of working elements to various kinds of driving shafts having different shapes of shaft end.

Abstract: A tool is configured with a centering element and a fastening portion with form-locking elements for axial mounting and fastening onto a drive shaft of a hand-held power tool. The centering element and the form-locking elements are arranged in a first tool part. The form-locking elements are located radially outside the centering element and are configured with a quadrangular cross section that corresponds to a trapezoidal cross section, which is perpendicular to an axis of the drive shaft.

Abstract: An accessory tool is configured to be coupled to a power tool having a tool drive structure. The accessory tool includes a spring component and has a first arm and a second arm attached to the spring component. The first arm includes (i) a first proximal end portion defining a first accessory drive structure that is configured to mate with a first portion of the tool drive structure, and (ii) a first distal end portion having a first holding structure. The second arm is spaced apart from the first arm and includes (i) a second proximal end portion defining a second accessory drive structure that is configured to mate with a second portion of the tool drive structure, and (ii) a second distal end portion having a second holding structure.

Abstract: The invention is based on a device having a centering element (10) and at least one form-locking element (12) for fastening an axially mountable tool (14) to a drive shaft (16), which is drivable in an oscillating manner, of a hand-held power tool (28) in which the centering element (10) is provided for centering the tool (14) relative to the drive shaft (16), and the form-locking element (12) is provided for defining a rotary position of the tool (14) relative to the drive shaft (16). It is proposed that the form-locking element (12) is located radially outside the centering element (10).

Abstract: A jigsaw apparatus includes a motor housing having a motor drive, a blade reciprocally powered by the motor drive, and a blade support arrangement that includes an arm that extends to the rear (or side) of the motor housing, the arm having a free end that supports a guide block. A base positioned at the lower end of the motor housing has sockets or like receptacles that receive the arm at selected orientations. The blade is specially configured, having an opening at its lower end for receiving a fastener and a slider block. The slider block travels in a vertical bore of the guide block.

Abstract: A sawing machine includes a base body which has a front portion, a rear portion and a worktable with a working surface, and a support body disposed adjacent to the rear portion. The worktable has a sawing slot that opens at the working surface. An upper hollow arm is fixed to the support body and is located above the working surface. A lower hollow arm is fixed to the support body and is located opposite to the upper hollow arm below the working surface. An upper shaft is mounted rotatably in the upper hollow arm, while a lower shaft is mounted rotatably in the lower hollow arm. A driving mechanism is mounted to the support body to drive the shafts to rotate synchronously. Two saw blade mounting members are mounted slidably and respectively to the hollow arms and define cooperatively a straight line passing through the sawing slot. The sawing machine has a converting unit for converting the synchronous rotations of the shafts into synchronous linear movements of the saw-blade mounting members.

Abstract: A scroll saw is disclosed as having a saw blade connected between the free ends of the arms of a C-shaped member. The C-shaped members is reciprocated about a horizontal pivot shaft at the closed or yoke end of the C-shaped member in order to reciprocate or drive the saw blade. An automatic bearing adjustment mechanism is provided for the horizontal pivot shaft that reciprocates the C-shaped member. For this purpose, an outwardly directed resilient force is applied against one of two bearings at opposite ends of the horizontal pivot shaft, the resilient force also applying an inwardly directed force through the horizontal pivot shaft to the other bearing, in order to eliminate any bearing play during operation and use of the scroll saw.

Abstract: A scroll saw has a base including integral walls forming a gear casing, a frame assembly mounted on the base, and lower and upper oscillating arm members pivotally mounted on the frame assembly. The gear casing houses gear and counterweight assemblies for driving and counterbalancing the oscillating motion of the lower and upper arm members. A saw blade is removably mounted between corresponding free ends of the lower and upper arm members. The ends of the saw blade are prepositioned between a pair of blade holders, and the entire assembly of blade and blade holders is then attached as a unit to the free ends of the arm members. Blade tension is adjusted by means of a tensioning system that indexes blade tension to rotation of a tension knob. The saw further includes a nonflexible tube which functions as a combination airblaster and blade guard for directing an air stream into a cutting area to remove sawdust and other debris while preventing accidental contact with the saw blade.

Abstract: The present invention is related to a stepless transmission scroll sawing machine with saw blade fastening and micro-inch adjusting device and the related positioning device and, more particularly to a scroll sawing machine which includes a carbon brush motor controlled by means of a control circuit to drive an eccentric plate to carry the saw blade control arms to make an up-and-down reciprocating motion so as to perform sawing process, wherein a saw blade fastening and micro-inch adjusting device is set to fasten up the saw blade and to adjust the tension of the saw blade according to the material to be processed, and wherein a positioning device is mounted on the upper arm to press on the material to be processed to facilitate the performing of sawing process and to prevent the saw blade from breaking.

Abstract: A scroll saw blade clamp and blade alignment tool to facilitate blade changes while assuring proper positioning and alignment of the blade. The blade clamp is for the upper end of the blade and includes a pair of clamp bars, one of which is pivoted to the upper saw arm. A locking screw clamps the bars together for clamping of the blade, and a strategically located pin prevents relative rotation of the clamp bars and also serves as a blade guide to properly locate the blade while it is being clamped in place. The alignment device takes the form of a flat bar provided with a recess for holding the lower blade clamp. A groove in the bar is centered on the recess to properly align a saw blade received in the groove.

Abstract: A scroll saw is disclosed having upper and lower reciprocable arms terminating in upper and lower ends having a saw blade connected therebetween. A releasable blade tensioning device is mounted on the upper end including a blade support member having a central portion pivotally mounted to the upper end with a first end thereof extending along the upper arm and a second end connectable to the saw blade. The blade support member is pivotable between a first blade tensioning position and a second blade tension releasing position, and a manually rotatable cam is mounted on the first end and a manually operable adjustment screw engageable therewith is mounted on the upper arm. The manually rotatable cam is constructed and arranged to force the first end and the upper arm apart in one rotated position thereof to move the blade support member to the first position, and to permit the blade support member to move to the second position in another rotated position thereof.

Abstract: A precision woodworking saw having a variable speed drive mechanism which drives a saw blade carried on a reciprocating C arm. An electric motor has a drive shaft carrying a split drive pulley which drives a split driven pulley through a V-belt. The driven pulley is mounted on a driven shaft which reciprocates the C arm through an eccentric drive arm. The pulley sections of the split pulleys are movable toward and away from one another to vary the pitch of each pulley and its effective diameter. An adjustment knob can be turned to adjust both pulleys simultaneously to vary the speed ratio between the driven shaft and drive shaft as desired to control the speed at which the saw blade is driven.

Abstract: A scroll saw is disclosed having a base with a table mounted at one end and a horizontal pivot shaft mounted at an opposite end of the base. A yoke member having upper and lower arms and a curved bight connecting the arms is mounted on the pivot shaft at the curved bight. The arms of the yoke member terminate in upper and lower ends having a saw blade connected therebetween and extending through the table, and means are provided for reciprocating the yoke member and pivot shaft to effect movement of the saw blade. The opposite ends of the pivot shaft are mounted in tapered roller bearings disposed in bearing support openings in the base. Cap members are provided at each end of the bearing assembly to hold the roller bearings and shaft in place and a wave spring is mounted between one cap and one roller bearing to apply a compressive force to the roller bearings in the direction toward the yoke to hold the bearings, pivot shaft and yoke in place.

Abstract: A scroll or jigsaw of the walking beam type is disclosed in which the upper and lower beams or arms are of hollow, tubular construction so as to have sufficient rigidity to resist up and down vibrational movement, and so as to permit lateral cutting. The beams are mounted in a pair of identical die cast frame members, and the drive motor is mounted directly to the rear of the frame members. The motor is connected to the rear ends of the beams for reciprocably driving them. The frame members, together with the motor, are pivotally mounted relative to a base or table frame thereby to permit angling of the saw blade (as opposed to tilting the table) for bevel cuts.

Abstract: A precision saw is the subject of the present invention. A framework mounts a planar member and presents a work surface having an opening for receiving a saw blade. A C-member is coupled with the framework and has upper and lower arms extending parallel to and above and below the work surface. The planar member is mounted for pivotal movement by a pivot rod positioned at a point in a horizontal plane located substantially at the center of the bight of the member. A saw blade extends between the upper and lower arms for cutting a work piece and a drive system is provided for moving the C-member in a generally vertical plane about the single pivot point.

Abstract: One end of an oscillating saw blade has a notch, and spaced from the notch is a hole through the blade. The head of the tool has a slot having a shaft extending through the rear end of the slot for receiving the notch. A pin extends partially into the slot for receiving the hole. A closer in the form of a cam is cammed into and out of the slot for moving the hole on the blade onto the pin and moving the end of the blade having the hole and the notch against the bottom of the slot. The cam closer is locked in place to lock the blade in the slot. A handle is attached to the cam closer for manually rotating the cam, and the cam has an overcenter orientation where the resilient forces from the blade pushing on the cam tend to rotate the cam to a closed position. A stop is provided to intersect the handle and stop it in its locked position. A jaw of resilient material may be provided between the blade and the bottom of the slot to spread forces from the cam on the blade.