Class 408/219 - Including tapered section

Subclass of Class 408 - Cutting by use of rotating axially moving tool
Definition: Device including a plurality of crests, each of which is
No. of patents: 23
Last issue date: 04/24/2007

Number	Title	Issue Date
7207867	Precision cemented carbide threading tap A precision cemented carbide threading tap is designed for use in precision tool holders in synchronous high speed tapping. The precision tap includes a fully cylindrical shank without the aid of squares, flats or other notches. The precision tap further includes a ...	04/24/2007
7147939	Coated carbide tap A coated carbide tap comprises a substrate consisting of tungsten carbide cemented with 12 to 16% by weight cobalt with additions of small amounts of transition metal carbides added to restrain grain growth, and may also contain low levels of impurities that might b...	12/12/2006
7144208	Low torque tap A low torque tap includes a shank portion with a driving square and a thread cutting portion. The thread cutting portion includes a threaded body with one or more asymmetrical straight flutes that run essentially parallel to a longitudinal axis of the tap. The threa...	12/05/2006
7112143	Thread former or tap Cold thread forming tap or screw tap with a shaft, said shaft having a chuck portion at the one end and a forming or cutting profile portion on the other end, the forming or cutting profile portion being realised as a separate profile element and being fixable centr...	09/26/2006
7101125	Twist drill A twist drill including a cutting tip having a front flank face, a substantially cylindrical tool body extending rearwardly from the cutting tip, and a shank. The tool body includes a rotational axis therethrough and at least one flute formed on an outer peripheral ...	09/05/2006
6931901	Method and apparatus for forming a threaded hole in a hydroformed part Method and apparatus are disclosed wherein a required threaded hole is formed in a hydroformed part with a single tool while the part remains in a hydroforming die cavity. In forming the threaded hole, a hole is first pierced in the wall of the part and then an annu...	08/23/2005
6386954	Thread forming tap and threading method It is an object of the invention to provide a thread-forming tap to which a chamfer can easily be mounted, and a general threading method. The thread forming tap of the invention has a threaded portion comprising a tapered chamfer and a parallel threaded ...	05/14/2002
5882152	Multi-bit drill A drill having an elongated body including a fluted land and a shank. The fluted land includes a plurality of radial grooves of reduced material thickness formed therein to the depth of the flutes. The grooves define discrete segments of the drill. Each s...	03/16/1999
5865847	Lordotic spinal implant A lordotic implant has a frusto-conical shape with external threads. Prior to placement of the implant, vertebrae are distracted in a manner to provide a desired lordosis between the vertebrae. The pre-distracted vertebrae are then tapped to provide a tap...	02/02/1999
5797710	Thread forming tap A tap having a reamer edge which is provided at a chamfer part, so that when the thread forming tap is pulled out after the internal thread is formed, a seam portion present at the crest of the internal thread is cut off, whereby even in a blind hole, for...	08/25/1998
5725336	Thread tapping cutting tool A thread tapping cutting tool includes a working part with a chamfer portion, control portion, and at least two thread cutting wings (separated by flutes) formed therein. The chamfer portion is at least one half of the length of the working part. Each of ...	03/10/1998
5033919	Stabilized tap with air release The invention comprises means to align and stabilize taps prior to the commencement of the actual cutting of the threads and to release air while tapping. On the tap a constant diameter stabilizer is placed before the tapered chamfer section of the tap. T...	07/23/1991
4708542	Threading tap An improved tap has a thread cutting portion over which there is a Titanium nitride coating. The Titanium nitride coating has a Rockwell C hardness of at least 70. The body portion of the tap underlying the Titanium nitride coating has a Rockwell C surfac...	11/24/1987
4466762	Tool for forming internal screw threads A thread forming tool comprising a metal cylinder having a thread tap mounted in an open-sided chamber in the cylinder so that the longitudinal axis of one set of teeth on the tap is parallel with the longitudinal center axis of the cylinder and positione...	08/21/1984
4396321	Tapping tool for making vibration resistant prevailing torque fastener A tapping tool for making a vibration-resistant prevailing torque fastener combination comprising a conventional first element having a standard thread form with first flank angles and a modified second element having a thread form characterized by second...	08/02/1983
4375708	Non-indexing machining method and apparatus Disclosed is a method and apparatus for machining a tubular workpiece to form an internally threaded coupling having a faced and chamfered end and a tapered counterbore. The method includes forming a tool support bar having a longitudinal axis and support...	03/08/1983
4316683	Semi-circular thread tap A tap for cutting threads in a hole which comprises a semi-circular tap body with threads cut in the circular surface extending to a diametrical surface. Modified embodiments include a rake angle at the cutting ends of the tap threads and a drill point to...	02/23/1982
4293254	Countersinking tool with removable cutting inserts A countersinking tool comprising a holder with at least two removable cutting inserts for countersinking relatively large holes. The holder has a locating recess and a seating surface for each insert, and is cut away at various parts to facilitate the cou...	10/06/1981
4181457	Tapping tool for making vibration resistant prevailing torque fastener A tapping tool for making a vibration-resistant prevailing torque fastener combination comprising a conventional first element having a standard thread form with first flank angles and a modified second element having a thread form characterized by second...	01/01/1980
4171177	Screw thread cutting member A male screw thread-formed member such as an insert having a thread cutting action has an exterior peripheral portion of substantially full V-thread form along which two or more angularly spaced apart flutes extend from one or both ends of the member, the...	10/16/1979
4116578	Rotary tool for making holes A rotary tool having a working part and a shank. The working part is formed by at least two axial portions of which the first portion is made with the profile of a twist drill for making a pilot hole, and the second portion is disposed axially between the...	09/26/1978
4050842	Rotary cutting tool A rotary cutting tool having a cutting element at one end and a cylindrical shank at the other end terminating in a T-shaped mounting tongue member, and a tool support for holding the tool in floating engagement the support having a cylindrical body with ...	09/27/1977
3945069	Threading taps A threading tap, having the usual longitudinally extending flutes to provide lands therebetween. Each land is provided with screw-cutting teeth, and each land has at least one cross-groove formed therein of a length equal to at least two teeth and of a de...	03/23/1976

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Class 408/219 - Including tapered section