Abstract: A tapping tee cutter for cutting plastic pipe is provided which comprises an externally threaded plug body attached to a thin-walled, hollow band cutter having a cutting edge with the portion of the band wall nearest the cutting edge having an external diameter at least as great as the cutting edge and forming a shoulder with an adjacent portion of the band cutter wall having a relieved external diameter sufficiently less than the diameter of the cutting edge so that frictional contact between the relieved diameter and a pipe wall being tapped is minimized.

Abstract: A removable cutter tooth for use with a cylindrical tooth carrier is herein disclosed. The removable cutter tooth has an elongated base. A thrust pin is formed integral with, and perpendicular to, a portion of the elongated base. A rib is also formed integral with the elongated base. A cutting insert is connected to the elongated base and to the rib.

Abstract: Hole saw consisting of a hardened metal tube with ground teeth at one end and a plastic cap at the other end.

Abstract: As part of the process of realigning the distal ends of a bone having an intermediate section of width W, an arcuate osteotomy is performed on the intermediate section using a cutter having an arcuate cutting edge of a diameter slightly greater than W and an arcuate extent of 180.degree.-N.degree.. The blade is oscillated through an arc of approximately N.degree. to form a crescentic joint having a maximum bearing area.

Abstract: A tapping T for effecting a house outlet connection on non-metallic plastic pipe. A tapping tool is threadedly supported in the body of a tapping T service connector adapted for mounting on a pipe main under pressure. The cutting nose of the tool is secured on a plastic head and is comprised of a smooth, thin wall circularly tubular sleeve the radial end facing of which is serially stepped axially inward in a repetitively controlled pattern of sequential relief about its periphery. To cut a slug or coupon, the cutting nose via the head is threadedly advanced into the pipe wall while a screw extending centrally outward of the cutting nose aids in retaining the cut coupon within the open bore of the sleeve.

Abstract: Disk cutting apparatus embodying a pair of detachable clamping elements having flat surfaces facing each other for clamping a stack of sheets of material therebetween from which the disks are cut. At least one opening is provided through a clamping element and is of a size corresponding to the size of the disk to be cut. A cutter extends through the opening and has inner and outer cylindrical surfaces with the outer surface being of a size corresponding to the size of the opening. The inner surface at one end of the cutter is beveled to provide an outwardly flaring annular surface which terminates in an annular cutting edge.

Abstract: A rotary bit for drilling concrete and reinforced concrete having a hollow drill stem with a transversely disposed drilling face at its outer end, the face having annularly disposed sawtooth surfaces including abrupt step portions alternating with trailing portions extending from the apex of a step to the root of the succeeding step, the trailing portions having diamond chips thereon and comprising crushing and grinding surfaces for the cuttings, and being sloped radially outwardly and axially upwardly to displace particles toward the outer periphery of the bit, and the bit having particle escape channels up its side surface adjacent the leading edges of the step portions which have hardened cutter inserts.

Abstract: A drive collar is non-rotatably mounted for sliding movement on an arbor between working and release positions. In working position, the drive collar is disposed adjacent the base of a hole saw which is threadably mounted on an end of the arbor, and the collar and the hole saw are coupled for positively transmitting drive torque from the arbor to the saw. In release position, the drive collar is retracted from the saw and rendered inoperative for quick and easy assembly and disassembly of the saw and arbor.

Abstract: The invention provides a hollow mill cutting tool capable of forming a cylindrical pin on one face of a plate member by removing material from the plate member. The cutting tool comprises a generally cylindrical member terminating in a tip portion having a toroidal cross-section and having its axis aligned with the cylindrical member. The inside diameter of the protruding end of the tip portion is selected to be the desired diameter of the cylindrical pin. The tip portion includes a plurality of forward helical surfaces each terminating at a forward end in a cutting edge extending across the thickness of the toroidal cross-section. Each helical surface extends rearwardly along a cylindrical path from the cutting edge at an angle of about 8.degree.-11.degree. with a plane transverse of the axis of the cylindrical member. A back helical surface, which is inclined at an angle of at least 55.degree. to a plane parallel to the axis, is connected to each of the foward helical surfaces.

Abstract: An arbor is provided for use with different size power tool chuck jaws and has a main body section of enlarged cross section relative to a shank of the arbor. The shank and main body section have a plurality of grooves therein with each groove longitudinally extending the length of the shank and into the adjoining main body section to define a continuous chuck jaw engaging surface which in the main body section of the arbor is of enlarged circumferential dimension relative to that of the shank drive surface for engaging different size chuck jaws in non-slipping positive driving relation.

Abstract: A self-boring bushing device adapted to provide passage through a structure, such as a wall, wherein the device is so constructed as to both thread and bore itself therein upon rotation thereof, thus providing communication between both sides of the wall, whereby electrical conduits or lead-in wires can be received therethrough, the device comprising a stud-like body having an enlarged head formed to receive a tool for rotating the stud and an elongated shank portion provided with external threads, and wherein the terminating end of the shank includes a plurality of boring teeth extending outwardly therefrom forming the annular free end of the stud-like body, the body being formed with an elongated, longitudinal bore wherein various elements can be passed therethrough, sealing plugs being also included to be positioned within each opposite, open end thereof.

Abstract: A quick-locking arbor, pilot drill, and hole saw assembly having particular utility with relatively small diameter hole saws in which one end of the pilot drill is received within a bore in the arbor, with a spring or other tension means surrounding the shank of the drill. The inserted end of the drill carries a washer and drill drive or sleeve, and the spring is trapped between the washer and a bushing which is held in the arbor body. A collar is carried on the pilot drill intermediate its ends and has camming surfaces integral therewith. The hole saw, being an elongate, hollow, cylindrical cutting member, has internal cam means which cooperate with the cam surfaces of the collar on the pilot drill so that upon relative rotation therebetween, the pilot drill is urged away from the arbor against the face of the spring or tension means, which is compressed between the washer and the end of the bushing, whereby the saw is locked between the end of the arbor and the collar.

Abstract: An improved means for locating the pilot drill of a hole saw assembly is disclosed. The assembly generally includes an arbor, which has a body and a spindle projecting from one end thereof, and a cup-shaped hole saw, with the arbor and the hole saw carrying cooperating cam and spring-loaded locking and driving means to draw one planar face of the arbor into secure flush engagement with the planar face of the base of the cup-shaped cutting member or hole saw itself. The forward face of the arbor has a recess therein, and one end of the pilot drill has a locating sleeve dimensioned so as to fit into the recess in the face of the arbor so that when the locking and driving means are utilized to draw the face of the arbor into flush contact with the face of the hole saw, the sleeve is trapped between the two faces, and the pilot drill is firmly located.

Abstract: A rotary cutter is disclosed herein having a hollow body adapted to be mounted on to the chuck of a power driven device such as a hand drill or the like. Within the hollow of the body, there is a metallic and magnetic member formed with a central slot or groove. A circular cutter is insertably received within the hollow of the body and includes projections which make and engage with the slot of the magnetic. The circular cutter is maintained in position on the body by the force of magnetic attraction and the rotating power of the body is imparted to the circular cutter by engagement of the projection in the slotted magnet. A circular cutter includes a tapered cutting edge which is disposed outwardly from the body so that only the circular cutting edge will engage with a work piece.

Abstract: Uneven wear of the cutting edges of rotating trepanning or drilling tools is avoided by employing at least two cutting blades, by providing a single support strip embedded in an elastically pliable material, and by arranging the cutting blades such, that the resultant force of the cutting forces produced during the drilling operation is directed to the support strip and is of a magnitude such that the lubricant film bracing said strip against the borehole wall does not break away.

Abstract: A novel compound angle cutting edge configuration on a die rule, slitter blade, hollow punches, shearing blades, etc. provides cleaner cuts on stock material with less tonnage, improved cutting and cleaner cuts. The die rule cutting edge includes a plurality of side by side notches on only one side of the cutting edge defining a plurality of equally spaced piercing points. A primary cutting edge extends from each piercing point substantially to a next adjacent piercing point and forms a compound angle with an imaginary line through the tips of the piercing points of between about one and fifteen degrees. In use, the cutting edges are axially pressed through stock material to cut blanks of predetermined configuration. The cutting action consists of the piercing points penetrating the material and then the primary cutting edges slicing the stock material from one penetration point, substantially linearly and unidirectionally, to the next adjacent penetration point.

Abstract: A cutting tool consisting of a cylindrical stem and shank separated by a greater diameter body, the body and stem defining a shoulder, an annular cutting surface including a ring of teeth separated from each other by a flute, a larger diametered bore extending coaxially from the cutting surface into the body and a smaller diametered bore continuing through the body and shank.

Abstract: A battery post and terminal cleaner includes a hollow base with a hollow mandrel in the base with a space around the mandrel. A scraper element is disposed in the space between the mandrel and the outer surface of the base. The outer portion of the base houses the scraper blade. A reamer extends from and above the base and a cap is provided removably connected to the base and covers the reamer. The cap has a ribbed surface to provide a friction surface which is engaged by the hand for operating the scraper. The base is ribbed and provides a friction surface for the hand when the cap is removed, for performing a reaming operation.

Abstract: Apparatus for cutting work provided with centering means and supported adjacent a housing drivably mounted for rotation on a frame, the housing being arranged to support a floating, cutting assembly having a cutting head and centering means for initial alignment with the centering means on the work and subsequent cutting of the metal by the cutting head to remove an annular portion of material from the work.

Abstract: A trepanning tool is adapted to receive attachments for performing boring operations on trepanned holes. The attachments interengage with the trepanning unit to establish a boring diameter concentric with, and adjustable with respect to, the trepanned diameter without removing the trepanning cutter.