Abstract: A power operated rotary knife assembly including a power operated rotary knife having an annular rotary knife blade, a trim guide, and a drive mechanism for driving the rotary knife blade about an axis of rotation. The assembly also includes a portable power unit, a vacuum assembly and a flexible shaft drive transmission coupled between the power operated rotary knife and the portable power unit. The portable power unit includes a drive motor assembly providing a rotational power source which is operatively coupled to the drive mechanism through the flexible drive transmission to rotate the rotary knife blade. The portable power unit also includes a blower assembly providing vacuum pressure at an inlet duct side, the vacuum assembly being in fluid communication with the inlet duct side to generate a vacuum pressure condition in a region of a cutting opening defined by the rotary knife blade and the trim guide.

Abstract: A knife blade for a cutting apparatus has two cutting edges which are arranged at a substantially triangular cutting portion extending longitudinal to a fastening portion, wherein the cutting edges have areas with different tooth pitches from tooth pitches in other areas.

Abstract: A cutting blade has two ends and two sides and includes a mounting hole mounted on a front housing of a brush cutter; a convex member on a central portion of either side and having two notches at two ends respectively and an intermediate, curved cutting edge; and two cutting edges on either side with the convex member disposed between, each cutting edge having a first end terminated at the notch and a second end terminated at either end. Two cutting edges of different sides with the mounting hole disposed between comprise a plurality of groups of an outward inclined cutting member and a cavity. The other two cutting edges of different sides with the mounting hole disposed between comprise a plurality of groups of an inward inclined cutting member and a recess.

Abstract: A knife with a serrated cutting edge may include a plate having a leading edge forming a plurality of teeth seats arranged in a stepped configuration, with each of the plurality of teeth seats. The knife may also include a plurality of elongate cutting elements each affixed to one of the teeth seats formed by the leading edge. The cutting elements may form a portion of the serrated cutting edge, and each may have a top surface and a bottom surface. The cutting edge may be on the top surface and the bottom surface may be affixed to one of the teeth seats. The serrated cutting edge has a plurality of primary serrations and a plurality of secondary serrations, with each of the cutting elements forming at least one of the primary serrations and at least one of the secondary serrations.

Abstract: A surgical saw blade for being coupled to a drive hub of a surgical saw assembly. The blade includes an attachment portion configured to be removably coupled to the drive hub and a cutting portion opposite the attachment portion. The cutting portion includes a plurality of teeth. The blade also includes a pivot portion configured to engage a pivot structure of the surgical saw assembly. Additionally, the cutting portion has a follower which engages a blade support of the surgical saw assembly and is configured to limit deflection of the blade during use.

Abstract: Herein a blade arrangement (6) for a hand-held power tool (2) is disclosed. The blade arrangement (6) comprises a driving member (16) configured for being driven to reciprocate along a driving direction (18), an elongated cutting blade body (12), and a clamping member (26). The clamping member (26) is configured to engage with the driving member (16) and the elongated cutting blade body (12) so as to press the driving member (16) against the elongated cutting blade body (12) at least partially in the driving direction (18).

Abstract: A wood cutting band saw blade includes a plurality of teeth extending upward from a continuous band portion. Each tooth includes a cutting edge and a back angle edge defining a tip, and a gullet. The gullet includes a forward edge extending from the back angle edge to a lowest point of the gullet, and a rearward edge extending upward from the lowest point to a cutting edge of an adjacent tooth. In some embodiments, the lowest point of the gullet is closer to the tip than to a tip of the adjacent tooth.

Abstract: A cutting blade for use in a lawnmower or other cutting device has a contoured leading edge profile that forms a series of protrusions and contoured notches. Each contoured notch has a surface that is smooth and contoured such that air is funneled through the contoured notch by the adjacent protrusions, thereby causing the air to form vortices at the surface of the blade. The formation of the vortices helps the airflow to adhere to the blade surface rather than separate from it, thereby creating a more laminar streamlined flow that merges with air flowing over the opposite side of the blade at the trailing edge. By preventing the airflow from separating from the blade surface over a substantial portion of the blade, turbulence is significantly reduced. Thus, noise generated by the blade is significantly reduced as well. In addition, the blade experiences less drag, and the performance of the blade and lawnmower is generally increased.

Abstract: An ultrasonic treatment device includes a connecting unit. The connecting unit including a first engagement portion which engages with a first screw portion and a second engagement portion which engages with a second screw portion, the connecting unit connecting a probe and a vibration generating unit to transmit the ultrasonic vibrations to the probe by rotation relative to the vibration generating unit and a treatment unit in a first direction around a longitudinal axis, and disconnecting the probe and the vibration generating unit from each other by rotation in a second direction opposite to the first direction.

Abstract: A reciprocating saw blade has a first end with a first tang and a second end with a second tang. The first and second tangs are alternatively engageable with the chuck of a reciprocating saw. The reciprocating saw blade defines a substantially uniform cutting edge extending from approximately the first end to approximately the second end of the blade. The first tang is engageable with the chuck of the reciprocating saw for fixedly securing the first end of the blade to the reciprocating saw and forming with the second tang the free end of the saw blade. Alternatively, the second tang is engageable with the chuck of the reciprocating saw for fixedly securing the second end of the blade to the reciprocating saw and forming with the first tang the free end of the reciprocating saw blade drivable in a reciprocating motion by the reciprocating saw.

Abstract: A tooth for a blade of a hair cutting apparatus includes a root secured to a base of the blade, a tip opposite the root, and a longitudinal axis of the tooth defined between the root and the tip. A lower, planar cutting surface is provided on the tooth, as is an upper surface opposite the lower surface, and sidewalls separating the upper surface from the lower surface. At least a portion of the upper surface and the sidewalls is elliptical in the direction of the longitudinal axis, beginning at the tip.

Abstract: A keyhole saw blade or sabre saw blade for a power tool comprises a base blade having a cutting edge and a securing shank designed as one piece with the base blade. At least one impression is formed into the base blade or the securing shank.

Abstract: A tool for parting, in particular for sawing, includes a carrier blade that has a toothing portion with a finite, geometrically determined toothing, and a receiver for fixing the carrier blade to a tool spindle of a power tool. The tool spindle can be driven in oscillation about its longitudinal axis. The toothing is disposed at a distance from the receiver and is configured to be advanced perpendicularly in relation to the longitudinal axis, such that the toothing is realized in a non-uniform manner along the toothing portion. The toothing portion has a middle region and end regions that adjoin the middle region and that are provided with strengthened corner teeth.

Abstract: The invention comprises cutting blades useful for cutting tape in packaging processes and cutting assemblies or bag sealing assemblies using the blades. Generally, the blades comprise a support and a plurality of teeth attached to the support wherein a first set of a plurality of the teeth defining a flat tip are positioned on the support between a second set of a plurality of the teeth defining a sharp tip and a third set of a plurality of the teeth defining a sharp tip.

Abstract: A reciprocating saw blade includes a body defining a longitudinal axis, an attachment configured to couple to a reciprocating saw, and a cutting portion. The cutting portion includes a plurality of cutting teeth, each having a tip and a rake face. The saw blade also includes a plunge point for initiating a plunge cut. The plunge point includes a leading tooth having a tip and a rake face extending from the tip. The tips of the plurality of cutting teeth and the tip of the leading tooth define a plane that is generally parallel to the longitudinal axis. A first angle between the plane and the rake face of the leading tooth, measured through the leading tooth, is greater than 90 degrees. A second angle between the plane and the rake face of each cutting tooth, measured through the corresponding cutting tooth, is less than 90 degrees.

Abstract: A shearing apparatus comprising an index portion and a thumb portion that are pivotable relative to one another about a pivot mechanism. One of the thumb blade and index blade is provided with a serrated portion, while the other of the index blade and the thumb blade is provided with a cutting edge, such that the serrated portion and the cutting edge cooperate with one another during the relative pivoting movement of the index portion and the thumb portion to carry out a shearing or severing action. The shearing apparatus can alternatively comprise a single blade portion, pulled by a handle, and provided with a serrated portion. In both embodiments, the serrated portion has a configuration that presents a compound angle, which comprises a cutting edge angle and an angle relative to the longitudinal direction.

Abstract: A plastic knife is provided comprising a handle, a blade, and a cutting edge. The blade may include a first surface and an opposite second surface, and integrally formed with and extending longitudinally from the handle. The cutting edge may be formed along one edge of the blade, the cutting edge comprising: (a) a first plurality of teeth integrally connected to and extending from the first surface, each tooth in the first plurality of teeth separated by a first concave groove; and (b) a second plurality of teeth integrally connected to and extending from the second surface, each tooth in the second plurality of teeth separated by a second concave groove. The first plurality of teeth and the second plurality of teeth may be integrally formed together while teeth in the first plurality of teeth and teeth in the second plurality of teeth are offset by a distance.

Abstract: A cutting wheel is provided for cutting a liquid crystal panel. The cutting wheel is disc shaped and includes a plurality of grooves disposed along an edge of the cutting wheel and cutting portions formed between the grooves. A pattern having a predetermined period is formed by multiple grooves and cutting portions. The grooves in each period have the same or different widths and depths and the cutting portions have probe shapes or cutting blades of different lengths. The cutting wheel is applied to dummy areas of the glass substrates forming the liquid crystal panel.

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 reciprocating saw blade for use with a reciprocating saw includes a body defining a longitudinal axis, an attachment portion configured to couple to the reciprocating saw, and a cutting portion formed on the body. The cutting portion includes a plurality of cutting teeth. Each cutting tooth includes a tip, a rake face extending from the tip generally toward the longitudinal axis and defining a gullet, and a relief surface extending from the tip. The blade also includes a plunge point formed on the body for initiating a plunge cut. The plunge point includes a leading tooth and a second tooth. The leading tooth includes a tip and a rake face extending from the tip generally toward the longitudinal axis and defining a leading gullet. The second tooth is positioned in the leading gullet adjacent the leading tooth and is generally smaller than the leading tooth and each cutting tooth.

Abstract: The claimed subject matter provides a cutting head for oscillating tools including a concave or recessed cutting edge. The cutting edge can be a recessed curve, an angular recess, or a combination of the two. The cutting edge can include one or more of serrations or cutting grit. The cutting head can conform to a variety of work piece geometries and cradle the work piece during cutting to prevent slipping and provide faster cuts by applying a greater proportion of the blade to the work piece at once and retaining the work piece between sides of the recess.

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 separation tool, in particular saw blade, for a machine tool has a blade body with a wave structure with a changing wave form.

Abstract: A utility tool comprising a body having a first end and a second end positioned on opposite ends of the body; a removable device; as well as a first tool and a second tool configured to be selectively coupled to each other or one of either the first end and second end of the body.

Abstract: An accessory configured for use with a reciprocating saw having a spindle. The accessory is configured to reciprocate with the spindle. The accessory includes an attachment portion having a tang including a first tang member and a second tang member and an aperture that extends through the attachment portion from a first broad side to a second broad side. The attachment portion also includes a first radius, which terminates to define a projection, located on a first narrow side. The attachment portion also includes a second radius, which terminates to define a projection, located on a second narrow side. The first radius and the second radius are configured to contact an exterior of the spindle.

Abstract: A hair clipper includes a comb-like fixed blade and movable blade having a plurality of blade pieces arranged in parallel. The fixed blade and the movable blade is overlapped with each other and the movable blade is reciprocatively slid with respect to the fixed blade in an arrangement direction of the blade pieces. Each blade piece of the movable blade has blade edges formed at both sides thereof, each blade edge being formed with a leading rectilinear part and a basal rectilinear part; the leading rectilinear part and the basal rectilinear part are inclined with respect to the blade edges formed at both sides of each blade piece of the fixed blade by an acute included angle ?; and each blade edge of the movable blade has a rake surface facing an opposite side to the fixed blade.

Abstract: A hand-saw-blade having a first edge provided with saw teeth and a plurality of elongated apertures spaced apart in a direction of the first edge is disclosed. A direction of elongation of the elongated apertures is oriented including an angle of between 15° and 65° and especially between 20° and 55° and further especially between 25° and 45° relative to the first edge. Furthermore, a hand-saw having this hand-saw-blade and a handle or bow-shaped metal-frame is disclosed, wherein the handle is mounted at one edge of the hand-saw-blade other than the first edge respectively ends of the bow-shaped metal-frame are attached to opposing edges of the hand-saw-blade different from the first edge.

Abstract: There is provided a replaceable drywall saw blade capable of reciprocating in-line when mounted to a hand held reciprocating power saw. The blade includes a generally planar body member having a generally linear top edge and a generally parallel opposed bottom edge. The blade further includes a generally linear upper piercing edge angularly offset downwardly from the top edge. The blade additionally includes a generally linear lower piercing edge angularly offset upwardly from the bottom edge. The upper piercing edge and lower piercing edge intersect to form a forward point on said blade. A mounting aperture is also formed on the blade for releasably securing the blade to the hand held reciprocating power saw.

Abstract: A thinning scissors of the present invention includes a first blade unit, a second blade unit, an adjusting button, a nut and a screw. The first blade unit has a first pivoting bore, and the second blade unit has a second pivoting bore. The adjusting button has an axle rotatably inserted in the first pivoting bore. The axle has an offset bore whose axis is offset from that of the axle. The nut is rotatably disposed in the offset bore, and the screw is inserted in the second pivoting bore and threaded with the nut. Thereby, the rotational axis of the first blade unit and that of the second blade relatively move as the adjusting button rotates in the first pivoting bore.

Abstract: A reciprocating saw blade for use with a reciprocating saw, the saw blade including a body including a first substantially planar surface and a second substantially planar surface opposite the first surface, an attachment portion for coupling the saw blade to the reciprocating saw, a cutting edge including a plurality of cutting teeth, and a rib element including a pair of outermost rib members. One of the outermost rib members is proximate the cutting edge and the other of the outermost rib members is proximate a back edge of the blade opposite the cutting edge. Each outermost rib member includes a first portion and a second portion. The first portions of each of the ribs are substantially parallel to one another.

Abstract: A concave tapered food product includes a cross section and a second end having a shape defined by a generally concave arc and a generally convex arc. The concave tapered food product has a first side and a second side shaped by a longitudinal cut along the foodstuff. A cutter assembly for cutting a foodstuff to form the concave tapered food product includes a housing member. The cutter assembly also includes a curvilinear blade including a cutting edge for cutting the foodstuff, the cutting edge defining an arc along a first portion of the curvilinear blade and a foot positioned at an end of the curvilinear blade for supporting the curvilinear blade. The foot is configured for being received and secured in the housing member. The housing member is configured for at least partially enclosing the curvilinear blade.

Abstract: A serrated blade for an arrowhead, a crossbow bolt and/or another suitable projectile. The blade has a first blade surface that intersects with a second blade surface to form at least one cutting edge. The blade also has a mixed serration section of at least one small serration and at least one large serration. The mixed serration section is positioned adjacent to at least one cutting edge. The serrated configuration of this invention allows the blade to cut in a saw-like manner as the blade passes in a forward direction through a target material.

Abstract: A knife has a cutting blade with an elongate planar body having a front and a back, a first and second opposite edges, the elongate body having a centerline extending between the first and the second edges, each of said first and second edges being provided with a plurality of angularly-oriented notches defined by beveled surfaces, which intersect to form cutting edges. The notches have a generally V-shaped configuration and have one or more sides that extend at an acute angle in relation to the centerline.

Abstract: A tool for removing unwanted plants from an area of soil is disclosed. A flexible two-edged blade bent back upon itself with both ends fastened to a common shaft. One edge acts as a knife to slice through soil and roots, moving parallel to the surface of the ground. The opposing blade edge has teeth to grasp, uproot and remove unwanted plants. The design facilitates the removal of unwanted plants or debris without touching said debris with the hands.

Abstract: A cutting assembly for cutting a substrate has two circular cutting wheels. The cutting wheels are bonded together as a unitary unit. Each cutting wheel has cutting protrusions on its circumference. The cutting assembly creates two lines of intermittent cuts on the substrate.

Abstract: A concave tapered food product includes a cross section and a second end having a shape defined by a generally concave arc and a generally convex arc. The concave tapered food product has a first side and a second side shaped by a longitudinal cut along the foodstuff. A cutter assembly for cutting a foodstuff to form the concave tapered food product includes a housing member. The cutter assembly also includes a curvilinear blade including a cutting edge for cutting the foodstuff, the cutting edge defining an arc along a first portion of the curvilinear blade and a foot positioned at an end of the curvilinear blade for supporting the curvilinear blade. The foot is configured for being received and secured in the housing member. The housing member is configured for at least partially enclosing the curvilinear blade.

Abstract: A tooth for a blade of a hair cutting apparatus includes a root secured to a base of the blade, a tip opposite the root, and a longitudinal axis of the tooth defined between the root and the tip. A lower, planar cutting surface is provided on the tooth, as is an upper surface opposite the lower surface, and sidewalls separating the upper surface from the lower surface. At least a portion of the upper surface and the sidewalls is elliptical in the direction of the longitudinal axis, beginning at the tip.

Abstract: A hook-shaped knife blade is provided having a curved sharpened inside edge, the sharpened edge comprising a plurality of serrations. The plurality of serrations abut each other to form a plurality of points where adjacent serrations abut, and each serration has an arc-shaped scallop forming a portion of the sharpened edge. The serrations move material away from the leading edge of the blade, thereby keeping the edge cleaner and providing a longer usable blade life. Moreover, the points provide localized pressure on the material when starting a cut, enabling better penetration into the material, while each serration acts as a mini-hook blade, forcing the material to be cut into the curve instead of pushing it away.

Abstract: The invention comprises cutting blades useful for cutting tape in packaging processes and cutting assemblies or bag sealing assemblies using the blades. Generally, the blades comprise a support and a plurality of teeth attached to the support wherein a first set of a plurality of the teeth defining a flat tip are positioned on the support between a second set of a plurality of the teeth defining a sharp tip and a third set of a plurality of the teeth defining a sharp tip.

Abstract: A serrated blade for an arrowhead, a crossbow bolt and/or another suitable projectile. The blade has a first blade surface that intersects with a second blade surface to form at least one cutting edge. The blade also has a mixed serration section of at least one small serration and at least one large serration. The mixed serration section is positioned adjacent to at least one cutting edge. The serrated configuration of this invention allows the blade to cut in a saw-like manner as the blade passes in a forward direction through a target material.

Abstract: A knife includes a knife blade defining a knife plane having a cutting edge on one side and a spine an opposed side, wherein the cutting edge and the spine meet at a point of the knife blade at a distal end thereof, the knife blade including a bolster at an end of the knife blade opposed from the point and a tang adjacent the bolster, and a handle attached to the tang of the knife blade, the handle includes a body portion, the handle includes a spine support extending along a portion of the spine of the knife blade and coupled to the knife blade at a position spaced from the point, and wherein the spine support is spaced from the spine for at least a portion of the spine. A resilient buffer member may be provided between the knife blade and the handle.

Abstract: There is provided a culinary utensil comprising a blade provided with a cutting edge on at least one side thereof, said cutting edge is formed of at least one set of taller teeth and one set of shorter teeth, wherein at least two adjacent taller teeth are separated by three to eight shorter teeth on the cutting edge.

Abstract: A serrated pipe cutter comprising handles pivotally coupled together and movable between first and second positions; wherein the first handle includes a grip at one end and a blade at an opposite end; the blade includes an elongated cutting edge which defines a cutting edge surface tapering inwardly, a plurality of serrations extending along the cutting edge, and a plurality of cutting tips extending between adjacent serrations. Each serration defines a cutting edge surface, a substantially concave facet tapering inwardly, and a linear serration cutting edge extending between adjacent cutting tips. Each cutting tip defines a cutting tip surface tapering inwardly and a linear cutting tip edge extending between adjacent serrations, at least a portion of which is offset from at least a portion of the serration cutting edge.

Abstract: Certain embodiments of the present invention provide a tactical knife. The knife, in certain embodiments, includes a handle and a blade. The blade may further be formed so as to include a sharp edge, a sharp serrated edge, a non-sharp serrated edge and a gut hook. In certain embodiments, the handle may house a light source so the knife may be used in poorly lit environments and/or in combination with a gun. A power source may be housed inside of the handle and the handle may also include a dome switch to operate the light source. Sufficient sealant is placed in strategic locations throughout the handle so as to make the knife of certain embodiments of the present invention water resistant.

Abstract: Handheld tactical knife combining structural features of a structurally advantageous and stress distributing base cross section (FIG. 2A), a penetrating tip (220), tapers in perpendicular axis along the blade length (FIG. 2, FIG. 3), and a cutting edge (212). The preferred embodiment contains scallops (214), a gut hook (218), and a penetrating chisel-type tip (220).

Abstract: Saw blades, including band saw blades, reciprocating saw blades, hole saw blades and hand hack saw blades, are made from a bi-metal strip. The bi-metal strip includes a cutting edge defined by a plurality of cutting teeth that is welded to an axially-elongated carbon or spring steel backing. The cutting edge is formed of a high speed steel alloy consisting essentially of: about 8/10% to about 1% carbon, up to about 45/100% silicon, up to about 4/10% manganese, up to about 3/100% phosphorous, up to about 3/100% sulfur, about 4% to about 6% cobalt, about 3% to about 5% chromium, about 4½% to about 5½% molybdenum, about 1% to about 2½% vanadium, about 5½% to about 7% tungsten, and about 74% to about 78½% iron.

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 knife has a cutting blade with an elongate planar body having a front and a back, a first and second opposite edges, the elongate body having a centerline extending between the first and the second edges, each of said first and second edges being provided with a plurality of angularly-oriented notches defined by beveled surfaces, which intersect to form cutting edges. The notches have a generally V-shaped configuration and have one or more sides that extend at an acute angle in relation to the centerline.

Abstract: A knife having a blade tip configuration that reduces incisional force by providing a more efficient distribution of tissue piercing and cutting forces over the cutting edges. The distal tip of the blade has a profile in plan view that may be described as bounded by the following equations w=5.886(d)0.663 and w=1.561(d)0.820 where w is the distance in microns from the blade's longitudinal axis to the blade's cutting edge and d is the distance in microns along the blade's longitudinal axis from the extreme distal point of the blade tip. The extreme distal point of the tip has a slightly rounded, rather than pointed, profile, with a tip radius of approximately 40 microns or less.

Abstract: An ultrasonic surgical device capable of cutting biological tissues such as bone and cartilage. The ultrasonic surgical device includes a static casing, which sheaths an ultrasonic horn, and a lubrication film, which separates the ultrasonic horn and the static casing. The static casing, which also incorporates a plurality of fluid channels to allow passage of fluids along its length and eventual distribution of such fluids at the cutting end and biological tissue interface, inhibits the transfer of heat generated along the ultrasonic horn. The cutting end and the static casing are separated by a flexible joint, which serves to inhibit the transfer of vibrational energy, and consequently heat, from the cutting end to the static casing. As such, the static casing remains stable and can be used both to manipulate the surgical device with greater haptic control and facilitate effective penetration of larger cross-sections of biological tissue.