Abstract: An oscillating blade for cutting or shaping sheet materials such as drywall, with a blade, a sharing portion, a depth gauge for determining depth of cut, a caliper portion for premarking sheet materials for a standard dimension cut, and a reverse direction blade.

Abstract: A plurality of osteotomes that are linked together via a recess and a matching projection such that the osteotomes remain linked when used to manipulate bone.

Abstract: A three-sided disposable cutting blade for use within a utility knife. The cutting blade features between three and six distinct cutting portions. The cutting blade may be rotated and flipped such that each cutting portion may be presented from the utility knife as the active cutting portion. Features of the cutting blade include a wear-coat indicator which is located at or near each cutting portion and indicates when a portion has been used; grippable locations on the body of the blade to increase the grippibility of the blade when removing and handling the blade; multiple mounting-hole orientations; and mass-reducing punch-outs which reduce cutting friction of the blade against the object being cut.

Abstract: A recip blade has a blade body and a tang located at one end of the blade body. The blade body has a distal portion located on an opposite end of the blade body relative to the tang. The distal portion defines a tip and at least one aperture extending through the blade body. A cutting edge extends along the blade body between the tang and the tip.

Abstract: A cutting tool (1), and a method of exchanging an interchangeable blade as well as a cutting tool housing, in particular for severing flat and/or strand-form materials. The cutting tool (1) includes a housing (2), at least one interchangeable blade (8) arranged at a holding portion (6) of the housing (2), and a locking member (40) arranged movably on the housing (2) for locking the blade (8) to the housing (2). The housing (2) has first positively locking elements (23, 24, 26, 28) and the locking member (40) has second positively locking elements (42) which jointly lock the blade (8) in a given position to the housing (2).

Abstract: A three-sided, multi-edged disposable cutting blade for use within a utility knife. The cutting blade features between three and six distinct cutting edges. The cutting blade may be rotated and flipped such that each cutting edge may be presented from the utility knife as the active cutting edge. Features of the cutting blade include a wear-coat indicator which is located at or near each cutting edge and indicates when an edge has been used; grippable locations on the body of the blade to increase the grippibility of the blade when removing and handling the blade; multiple mounting-hole orientations; and mass-reducing punch-outs which reduce cutting friction of the blade against the object being cut.

Abstract: The utility knife blade is a blade for a utility knife having a slot formed in the blade that is especially useful when scoring drywall. The slot may engage a tape measure adjacent the tape hook so that the cutting edge at the scoring tip of the blade extends below the tape measure hook to engage the sheet of drywall. The slot extends through the cutting edge into the body of the blade at a slight angle relative to normal, preferably about 10°. The blade has a slot at each end so that the blade may be reversed when one end is dulled or broken. The blade has an otherwise standard configuration, typically having a trapezoidal body with a cutting edge extending along the longer parallel edge and a pair of notches in the shorter parallel edge for engaging knife holder retainer pins in the slidable utility knife holder carriage.

Abstract: A blade assembly of a hedge trimmer includes at least one cutting blade having cutting teeth. At least one portion of the cutting teeth are configured as protective teeth which, referred to the cutting blade axis, have an inner cutting region and from which an outer protective finger extends. The protective tooth is, referred to its tooth axis, configured unsymmetrically. The protective tooth has a cutting side and an opposite-lying holding side and a cutting edge in the cutting region on the cutting side and a holding edge on the holding side. The protective finger has a forward edge on the cutting side and a rearward edge on the holding side. Starting from the blade axis, the forward edge is inclined to the tooth axis and the rearward edge, starting from the blade axis, is inclined away from the tooth axis.

Abstract: A hand saw includes a saw blade, a handle, and a blade carrier. The saw further includes a blade clamp assembly having a locking member that removably couples the saw blade to the blade carrier so that the saw blade pivots with the blade carrier about a pivot axis. An actuating button is manually movable generally transverse to a longitudinal axis of the saw blade by the user between an engaged position and a disengaged position. In the engaged position, the actuating button engages the blade carrier to retain the blade carrier and the saw blade in one of an extended position and a folded position. In the disengaged position, the actuating button is disengaged from the blade carrier so that the blade carrier and the saw blade can be pivoted between the extended and the folded positions of the saw blade.

Abstract: A spatula having a body with a top working surface and a bottom surface is provided. The spatula body also includes a first end and a second end opposite to the first end. A handle is mounted to the first end of the body and the body has a first mounting member depending from the spatula body proximate the second end of the spatula body. The mounting member has an interior for receiving a mounting portion of the spatula blade and a second open end opposed to the first open end. The spatula body includes an opening in the body for cleaning the mounting member. A blade is provided for the spatula. The blade has a front section having a top surface and a bottom surface. At least a first spring tab extends rearwardly of the front section. The spring tab has a concave surface for one of its top and bottom surfaces.

Abstract: A material removing tool, such as a cutting or grinding tool, adapted to be oscillated by the output shaft of a manually operable motor-driven apparatus, is provided with at least one elongated cutting edge defined by teeth or analogous cutting elements arranged in at least one at least substantially straight linear array.

Abstract: A utility knife blade for a powered utility knife, has a blade body with an upper edge defining an upper blade notch, an opposite, lower edge defining a cutting edge, and a loading assist aperture positioned between the upper edge and the lower edge. The cutting edge has first and second cutting portions separated by a vertical centerline of the blade body. The first cutting portion has a structural configuration matched to cutting material of a first cutting character, with a curved or inclined first end cutting portion spaced and directed away from the vertical centerline, and the second cutting portion having a structural configuration matched to cutting material of a second cutting character, the first and second cutting characters being different.

Abstract: The apex portion of a triangular shape hobby knife blade has a linear cutting edge margin angling inward toward the apex, and an opposing lineal blunt edge margin having a single blunt edge notch to form both a blunt edge corner point within the blunt edge, and a cutting edge point tip at a distal end of the cutting edge. A concave portion of the notch is intermediate a beginning and ending portion; and with the notch as defined by the ending portion being directionally oriented to the elongate edges between a first angle and a second angle. The corner point and notch impede a penetration of the blade after the distal cutting tip impresses or pierces the skin; and also enables a motion toward the apex by the user to maneuver cut away substrate pieces without piercing damage.

Abstract: A composite utility knife blade and method of making such a blade involves butt joining a tool steel wire to a front edge of an alloy steel backing strip. The wire is electron beam welded to the backing strip to form a composite strip defining a first metal portion formed by the alloy steel backing strip, a second metal portion formed by the tool steel wire, and a weld region joining the first and second metal portions. The composite strip is annealed and hardened such that the first metal portion defines a surface hardness within the range of approximately 38 Rc to approximately 52 Rc, and the second metal portion defines a surface hardness within the range of approximately 60 Rc to approximately 75 Rc. The hardened strip is then tempered, quenched, surface treated to form a sharpened cutting edge, scored, and separated into a plurality of blades.

Abstract: A blade assembly is provided for use in a wire stripping system, where the blade assembly includes a first blade including a first cutting opening therein, the first opening including a first guide surface on one side of the first opening and a first cutting surface on the opposite side of the first opening, and a second blade including a second cutting opening therein, the second opening including a second guide surface on one side of the second opening and a second cutting surface on the opposite side of the second opening. The blades impart a rotation force on the wire to cause the cutting surfaces to make a depth-controlled circumferential cut in the sheath around the entire wire.

Abstract: A de-icicling tool has an icicle removing head mounted onto the distal end of an elongated handle. The head is formed of a generally flat blade and a mounting sleeve to that fits onto the distal end of the handle. The blade member has a series of triangular teeth in a concave arc along the front with each tooth having a point and beveled edges which meet at the associated point. The points of the teeth are rounded. The blade has at least one generally triangular notch formed along its rear thereof, each notch having a pair of beveled edges. There is one or more one round aperture in the blade, each with a beveled edge and with a diameter of three to five centimeters. The mounting sleeve includes a threaded socket adapted to accept a male thread of a standard broom handle or paint pole.

Abstract: Disclosed is a punch-down tool blade suited for seating, and seating and cutting data transmission and telephony wires into crowded patch panels. Also disclosed are embodiments of an elongated punch-down tool blade having a slidable locking collar which may be used in reversibly locking a punch-down tool blade with either the seating tip being used as the working tip or the seating and cutting tip used as the working tip without compromising both the ability of the tool tip to gain access to terminating clips or the tradesman's visibility of terminating clips so that patch panels may be efficiently and accurately wired while providing enhanced safety and decreased worker fatigue.

Abstract: A scraper blade preferably configured for use with a reciprocating saw. The blade has a first end comprising a mounting structure, and a second end with a cutting edge. The second end is coupled with and spaced apart from the first end. Preferably, the first end is configured to be mounted in a reciprocating saw chuck and the first and second ends are integral. Further, the first and second ends are preferably manufactured from heat treated steel comprising between approximately 0.45 to 1.05% carbon and between approximately 0.3 to 1.0% manganese. Preferably, the steel has a yield tensile strength of between approximately 150,000 to 250,000 pounds per square inch, a modulus of elasticity of between approximately 20,000 to 40,000 kilopounds per square inch, and a hardness on the Rockwell C scale of between approximately 30 to 60.

Abstract: A hand-operated pruning clipper having a multi-function plastic top handle and metal bottom handle with metal bypass cutting blades for cutting twigs and branches. A pair of wire cutting blades and a plastic bag slicing blade are incorporated into the metal cutting blades.

Abstract: The utility knife blade is a blade for a utility knife having a slot formed in the blade that is especially useful when scoring drywall. The slot may engage a tape measure adjacent the tape hook so that the cutting edge at the scoring tip of the blade extends below the tape measure hook to engage the sheet of drywall. The slot extends through the cutting edge into the body of the blade at a slight angle relative to normal, preferably about 10°. The blade has a slot at each end so that the blade may be reversed when one end is dulled or broken. The blade has an otherwise standard configuration, typically having a trapezoidal body with a cutting edge extending along the longer parallel edge and a pair of notches in the shorter parallel edge for engaging knife holder retainer pins in the slidable utility knife holder carriage.

Abstract: A medical waste disposal device having a blade that rotates and chops medical waste into chips and other small particles. The blade includes at least one opening with at least one sharpened edge. The blade also has at least one raised portion adjacent to the sharpened edges. The blade cooperates with a cutting plate to chop or scissor the medical waste. The raised portion pushes chopped medical waste away from the blade and the cutting plate.

Abstract: A triple function slitting, picking, and holding safety blade for use in the graphic arts trade; for slitting through, picking up, and holding portions of computer cut vinyl adhesive material. A slight rotation of a user's blade holding tool changes a blade's function from slitting to picking to hold-down modes with increased user safety with its restricted blade penetration and with fewer carpal tunnel stress motions required in its use. A notch within a cutting edge of and near to the apex point of a generally triangular shaped cutting blade end exposes a new cutting edge. A bend is located between the newly exposed cutting edge and the apex point to further expose the new cutting edge for sufficient clearance to slit a vinyl material's planar surface. An exterior portion of the bend serves as a blunt stylus type hold down tool which prevents any piercing of the vinyl material's surface.

Abstract: An edge trimmer for an uncured elastomer strip being conveyed in the longitudinal direction of the strip is disclosed. In the uncured elastomer strip, cords laid parallel with each other along the longitudinal direction of the strip, are embedded. The edge trimmer comprises a cutter head comprising a blade for trimming an edge portion of the uncured elastomer strip. The cutter head is freely movable in the transverse direction of the uncured elastomer strip being conveyed. The blade has a pair of v-shaped cutting edges opening towards the upper stream of the conveyed direction of the uncured elastomer strip. Preferably, the thickness of the blade is 1.0 to 2.0 mm, the opening angle of the V-shaped cutting edges is 30 to 70 degrees, an angle of each of the cutting edges is 35 to 65 degrees, and the cutting edges are formed on the thickness center plane of the blade.

Abstract: A saw blade incorporates an integrated cant angle. The saw blade includes a cutting portion having a toothed edge and opposite edge. The toothed edge defines a cutting plane. A shank portion extends from the cutting portion and is laterally offset from the opposite edge of the cutting portion defining a step thereat. The shank includes an end portion including a mounting edge, the mounting edge and step define a mounting plane which is angularly offset from the cutting plane.

Abstract: The invention described herein relates to a flush cut saw that is capable of safely making a flush cut. The saw has a handle with a thin, flexible blade extending therefrom. The blade has two elongated extensions running away from the handle. The extensions can each have external and internal edges, and are mounted in a spaced, opposed relation. The internal edges can be provided with teeth preferably oriented to allow for a pull cut. The external edges are dull, and may be curved to prevent injury.

Abstract: The invention relates to a knife holder for a microtome having a knife receiver for fixing and positioning a knife and a knife for the knife holder. The knife holder is ergonomic, the operation is made easier and safer, and the knife does not need to be changed as often. To this end, the knife receiver is constructed to accommodate a disk-shaped knife. The knife is given the shape of a regular polygon, whereby the edges are cutters. The knife receiver has an axle on which the knife can rotate such that the cutters can be positioned for cutting an object.

Abstract: This invention consists of three new features which on their own or in combination, improve the usefulness of the existing drywall jab saw. The three new features are the addition of fine teeth to the top of the blade, a blade with equally spaced holes along its length which are used as a rip guide, and a notch at the end of the handle to help remove narrow rips of drywall.

Abstract: A utility knife including: a body defining an interior cavity, and a blade carriage slidably disposed within the cavity. The blade carriage is configured for removably receiving at least one blade, and is at least partially slidably removable from the cavity, thereby allowing facile replacement of the blade. In one embodiment, the carriage may receive first and second blades, each of which is extensible from an associated end of the body. A utility knife blade including dual cutting edges and cutting points is also provided.

Abstract: An improved mounting arrangement for a knife to a disc for use on a rotary disc cutter that eliminates the need for a threaded connector and the associated nut is disclosed. It also provides a positive retention method on the top side of the disc. In addition, it provides a method of removing the knife from the disc without the use of wrenches, simply requiring a tool for prying, such as a screw driver. A further feature is a low profile retainer does not need to be protected by a wear protector.

Abstract: A cutting tool having a blade and a member which is biassed toward a safety position, in which the member forms a guard for the blade, but which may be displaced for exposing the blade by bringing the tool into cutting contact with a workpiece. The cutting tool includes a locking mechanism having a trigger which must be moved from a first position to a second position to release the guard member from its safety position and which is arranged, so that each time the guard member is released from its safety position, it is displaced through a predetermined distance and then returns to its safety position. The guard member will become locked in place regardless of the position of the trigger.

Abstract: A composite utility knife blade and method of making such a blade involves butt joining a tool steel wire to a front edge of an alloy steel backing strip. The wire is electron beam welded to the backing strip to form a composite strip defining a first metal portion formed by the alloy steel backing strip, a second metal portion formed by the tool steel wire, and a weld region joining the first and second metal portions. The composite strip is then annealed, and the annealed strip is straightened to eliminate any camber therein. The annealed composite strip is then hardened such that the first metal portion defines a surface hardness within the range of approximately 38 Rc to approximately 52 Rc, and the second metal portion defines a surface hardness within the range of approximately 60 Rc to approximately 57 Rc.

Abstract: A pair of gardening shears includes two blades which are pivoted together and are provided with a plurality of through holes. The through holes are arranged at intervals along the longitudinal direction of the blades and are progressively smaller in diameter from the pivoting end toward the free end of the blades. The through holes of one blade alternate with the through holes of the other blade.

Abstract: Method for the rapid cleaning of produce with minimal loss, and apparatus to perform the method. The cleaning method taught in the present application enables the rapid cleaning of produce by removing an extraneous portion therefrom, by separating the extraneous portion from the body of the produce, and by urging the cleaned produce towards a collection device. These steps are attainable, using the principles of the present invention, by a working using only one motion and one hand. To perform the method, a novel aperture knife is taught which, rendered attachable to an agricultural processing implement by an integral attachment device, enables one-handed operation by a user. The knife includes a generally planar knife body in operative combination with an elevated blade which not only enables the severing of the extraneous portion from the produce body, but separates the extraneous portion therefrom, and guides the cleaned produce body towards a collection device, for instance a picking box.

Abstract: A composite utility knife blade and method of making such a blade involves butt joining a tool steel wire to a front edge of an alloy steel backing strip. The wire is electron beam welded to the backing strip to form a composite strip defining a first metal portion formed by the alloy steel backing strip, a second metal portion formed by the tool steel wire, and a weld region joining the first and second metal portions. The composite strip is then annealed, and the annealed strip is straightened to eliminate any camber therein. The annealed composite strip is then hardened such that the first metal portion defines a surface hardness within the range of approximately 38 Rc to approximately 52 Rc, and the second metal portion defines a surface hardness within the range of approximately 60 Rc to approximately 75 Rc. The hardened strip is then subjected to at least two tempering and quenching cycles.

Abstract: A composite utility knife blade and method of making such a blade involves butt joining a high speed steel wire to a front edge of a carbon steel backing strip. Electron beam welding the wire to the backing strip and, in turn, forming a composite strip defining a first metal portion formed by the steel backing strip, a second metal portion formed by the high speed steel wire, and a weld region joining the first and second metal portions. The composite strip is then annealed, and the annealed strip is straightened to eliminate any camber therein. Then, a plurality of notches are formed, such as by punching, in axially spaced locations relative to each other along the back edge of the first metal portion of the annealed composite strip.

Abstract: An improved cutting insert for a cutting tool is designed from a blank of a regular geometry. The blank is designed so that an even number of channels are spaced equidistant around the periphery of the blank. The channels are elliptical in shape, and are arranged in alternating directions around the face of the insert. The grooves are designed to have a 7 degree relief angle.

Abstract: A cutter wheel for forming scribe lines on a brittle plate has a disk with two side planes. The disk has an edge formed at the outer periphery of the disk and a shaft hole formed at the center of the disk for inserting a rotational shaft. Further, at least one groove is formed to extend from a surface of one of the side planes along the shaft hole.

Abstract: Scissors include a first cutting blade, a second cutting blade and a support shaft. The first cutting blade has a handle and is formed with a through hole. The second cutting blade has a handle and is formed with an insertion hole. The support shaft extends through the through hole of the first cutting blade and the insertion hole of the second cutting blade, for pivotally connecting the first cutting blade and the second cutting blade in a manner such that the first cutting blade and the second cutting blade can perform relative rotation about the support shaft with respect to each other to thereby perform a cutting operation. The second cutting blade has a spring nut portion formed in the form of a spring nut on an inner peripheral surface of the insertion hole.

Abstract: A knife with ceramic blade including a body portion having a lower end. The lower end has a generally triangular lower portion extending downwardly therefrom. The lower portion has a lower end forming an apex. The apex has a channel formed therein extending a length of the body portion. A plurality of ceramic blades are provided that each have an elongated vertical upper segment and a lower cutting edge. The elongated vertical upper segment of each ceramic blade is received within the channel formed in the apex of the lower portion of the elongated body portion.

Abstract: An explosive laminated cutting tool which provides a self sharpening edge. The improved cutting tool s preferably comprised of two softer metals adhered to a hard central layer forming the cutting edge, with the central layer being made of such a material as tungsten carbide. The central laminate layer is preferably perforated to allow the outer layers to fuse through the perforations to adhere to one another, thus creating a strongly bonded laminated cutting structure which may be self sharpening. A method for manufacturing the cutting tool is also described. Another embodiment comprises a laminate wherein one of the layers has a plurality of recesses in the surface facing another layer. The recesses are filled with particles such as tungsten carbide or diamond. When the layers are explosively welded together, the particles are fused in the weld area.

Abstract: A saw blade (12) for use with a surgical saw (10). The surgical saw has a head (18) that is driven in a oscillating motion in order to cause like motion in the saw blade. The saw blade has a base (22) that is dimensioned to be inserted into a slot (24) in the front of the saw head. The base has a width less than the width of the slot to facilitate the easy insertion/removal of the saw blade. The saw blade also has a main section (36) formed integrally with the base (22) that has the cutting surface of the blade. The saw blade is further formed to have springs (42) that extend from the sides of the base. When the blade is inserted in the slot (24), the springs abut the interior walls (25) of the head that define the slot. A gap (48) separates each leaf spring from the adjacent side of the base.

Abstract: A tool including a handle, a blade-carrying portion attached to a first portion of the handle and a guide portion attached to a second portion of the handle. The second portion of the handle is movable with respect to the first portion of the handle thereby defining a variable distance between the blade-carrying portion and the guide portion. The guide portion includes a channel defining a longitudinal axis and a blade including two opposing ends and a generally u-shaped portion having a cutting edge thereon. The u-shaped portion is attached between the two opposing ends of the blade and the two opposing ends are pivotally attached to the blade-carrying portion. The blade is pivotable between a first cutting position and a second cutting position with respect to the blade-carrying portion. The blade defines a first cutting direction when in the first cutting position and defines a second cutting direction when in the second cutting position.

Abstract: The present invention is a tool for stripping a sliver-like section of the outer sheath from a multi-conductor cable or insulation from an insulated wire. The tool includes a blade and interconnected blade guide to strip the outer sheath from a cable or insulation from a wire without damaging interior contents. The tool has a handle including an upper and lower arm. The upper arm includes a blade-carrying portion and the lower arm includes a portion for guiding the cable or wire relative to the blade. The blade is pivotally attached to the blade-carrying portion. The upper arm may be springably attached to the lower arm and biased to a position such that the cable or wire can be inserted into the region between the blade and the guiding portion or the lower arm without any significant manipulation of the handle.

Abstract: A cutter wheel which can form a deep slit on an article to be cut so that the article can be broken easily along the slit and a perpendicular cut surface can be formed reliably when the article is broken along the slit. The cutter wheel is a disk-shaped member having a cutting edge along the outer edge and formed with a mounting hole extending therethrough along its axis. The mounting hole has an irregular shape so that the cutter wheel vibrates when it rolls due to steps between adjacent sides of the polygonal hole. The edge of the wheel can thus penetrate more deeply into the glass plate so that a deeper and smoother slit can be formed in the glass plate. This in turn makes it possible to more easily break the glass plate along the slit and to form a perpendicular cut surface.

Abstract: A cutter implement, for use within a cutting tool in connection with the securing of a tensioned steel strap about a package wherein a pair of vertically overlapped end portions of the tensioned steel strap are supported upon an anvil, is provided with a non-cutting recessed portion or notched region at a substantially central portion of its cutting edge such that if the cutting assembly of the cutting tool experiences overtravel movements with respect to the anvil and the pair of vertically overlapped end portions of the tensioned steel strap supported thereon, while the upper one of the pair of vertically overlapped end portions of the tensioned steel strap will be severed by the cutter implement, and while the upper surface of the lower one of the pair of vertically overlapped end portions of the tensioned steel strap may be scored by the cutting edge of the cutter implement, that portion of the lower one of the pair of vertically overlapped end portions of the tensioned steel strap which is engaged by or

Abstract: A surgical knife has a blade portion including a sharp edge disposed in a first plane and a dull portion offset from the first plane by a selected amount substantially equal to the amount of desired lengthening. When the blade is inserted into a previously-formed incision in tissue and moved in the direction of desired lengthening, the sharp edge cuts the tissue to lengthen the incision until the dull portion abuts against a wall of the incision to prevent further travel of the blade. The dull portion thus acts as a "stop" which prevents further travel of the blade beyond a desired point, enabling controlled lengthening of the incision.

Abstract: A subsurface weed tool which makes use of a variety of different detachable blade attachments to cut the roots of and other plants. The tool can be provided with a variety of different attachments, permitting it to be used for other purposes such as aeration of the soil, removal of sod strips and lawn and garden edging. The tool comprises an elongate hollow supporting member having an upper end on which is mounted a motor. An elongate drive shaft or rod is operatively connected to the motor and extends through the supporting member to the latter's lower end. A reciprocating drive unit is mounted on this lower end and includes a drive conversion mechanism connected to the bottom end of the drive shaft and capable of converting rotary motion to a reciprocating linear motion in a certain direction. A blade attachment is connectible to the conversion mechanism and can include a planar blade member with a forward cutting edge.

Abstract: Cutting pliers for plastic material sections, rubber-like joints and similar, including two levers (6, 7) articulated to each other on an axis (8) and kept spread apart by a spring (9), characterized in that one of the levers (6) supports an anvil (11) while the other lever (7) is provided with a blade-carrier (16) on which a blade is fixed in a removable manner.

Abstract: A method and apparatus for use as a wrenchless and adapterless collet system for attaching an elongated surgical cutting blade to an oscillating surgical saw. The system comprises a collet adapted to mate with a particularly shaped blade hub. The collet has a transverse clamping head attached to a longitudinally slidable, axially aligned shaft which is adapted to slide axially along the axis of the handpiece. The handpiece has an annular anchor sleeve having an annular groove proximally adjacent to the collet clamping head. The hub at the proximal end of the blade is provided with a radially inwardly extending locking flange adapted to engage the clamping head and a radially inwardly extending anchor flange adapted to engage the annular groove in the anchor sleeve. The longitudinal spacing between the hub flanges enables the hub to be received adjacent the anchor groove in an interdigitating mating of complementarily shaped surfaces.

Abstract: A saw blade retention system for retaining a saw blade to a reciprocating saw includes a shaft connected to the saw for reciprocation and having a slot for receiving the saw blade. The saw blade retention system also includes a chuck disposed about the shaft and having a slot aligned with the slot in the shaft in an unlocked position for allowing the saw blade to be disposed in the slot for the shaft. The saw blade retention system further includes a cam-type mechanism for allowing the chuck to rotate angularly relative to the saw blade and shaft to a locked position to prevent the saw blade from exiting the slots and for allowing the chuck to move axially relative to the shaft to prevent axial movement of the saw blade between the chuck and the shaft. Complementary inclined surfaces are provided on the blade and the chuck to center the blade relative to its intended path of reciprocation.