Class 408/220 - And relieved cutting edge

Subclass of Class 408 - Cutting by use of rotating axially moving tool
Definition: Device wherein at least one of said crests is formed specifically
No. of patents: 21
Last issue date: 10/02/2007

Number	Title	Issue Date
7275898	Threading tap for cutting threads in blind holes and methods of its manufacture A threading tap for cutting threads in blind holes includes an elongated body with a central axis, the body having at a rear end a connector portion, and having at a front end a threading portion. The threading portion is provided with at least one helical thread-cu...	10/02/2007
7241088	Threading tap for cutting threads in blind holes and methods of its manufacture A threading tap for cutting threads in blind holes includes an elongated body with a central axis, the body having at a rear end a connector portion, and having at a front end a threading portion. The threading portion is provided with at least one helical thread-cu...	07/10/2007
7150588	Thread forming tap with a non-circular cross-section and radially extending cutting edges A thread-forming tap includes an elongated body having, at first end, a connector portion, and having at a second end, a thread-forming portion. The thread-forming portion includes at least one thread-forming helical thread exhibiting a non-circular cross-section ha...	12/19/2006
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
6918718	Thread cutting tool having cutting teeth with stepped undercut flanks A thread cutting tool for cutting female threads includes a shaft and a cutting section composed of several groups of cutting teeth alternating with chip grooves. At least some of the teeth, preferably teeth disposed in a front region of the tool, have undercuts in ...	07/19/2005
6688988	Looking thread cold forming tool A thread forming tap comprising a shank section, a body section extending longitudinally from the shank section, a helical thread formed on the body section having radially converging flank portions and an undercut ramp formed in at least one of said flan...	02/10/2004
6217267	Cold forming tap having internal finish cutting edge and method of producing the same A cold forming tap with an internal finish cutting edge includes an external thread portion having radially outwardly protruding portions and relief portions which are alternately located in a helical direction in which an external thread extends. The pro...	04/17/2001
6213693	Taper taps for pipe threads made of hard material A high durability taper tap for pipe threads which can cut threads in a pipe made of hard materials having hardness of approximately 50 HRC. The sum Σγ of the width angle of cutters is large, approximately 130°, thereby achieving high strength and rigi...	04/10/2001
5897593	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...	04/27/1999
5803676	Method and tool for repairing damaged threads A thread repair tool and method of manufacturing are disclosed, along with a method for repairing damaged threads of a bolt, stud, or the like. The thread repair tool includes a pair of chaser sections each having a threaded inner diameter to match the th...	09/08/1998
5664915	Tap and method of making a tap with selected size limits A nib tap configuration in which the thread turns are of progressively increasing pitch diameter over a range of size limits associated with a standard basic pitch diameter. A particular size limit can be provided by grinding off the turns of a larger lim...	09/09/1997
5127776	Tap with relief There is a tap whose thread portion 2 forms a cutting section 5 and a guiding section 6 and is provided on a plurality of adjacent thread teeth of the cutting section 5 with a relief 8. It is desirable that a further machining measure be provided for the ...	07/07/1992
5112168	Tap with tapered thread There is a tap having a tapered threaded portion 2 whose thread teeth 4 located in the tapered section are provided with a relief arranged at a clearance angle. It is desirable that the cutting moment and friction should decrease to the back towards the g...	05/12/1992
4547104	Tap A self-locking fastener includes a male member, such as a bolt, having a standard, helical, male thread of constant diameter which is deformed by the special female locking threads of a female member, such as a nut. The female threads are defined by leadi...	10/15/1985
4536107	Drill bit A self-feeding, self-aligning drill bit includes a working end with a cylindrical portion having a desired cutting diameter and a conical threaded portion extending therefrom terminating in a threaded tip. The diameter of the threaded portion increases fr...	08/20/1985
4462727	Fluted tap A fluted screw tap has a plurality of thread lands each with a pair of outwardly facing flanks. Each flank of a pair has a different asymmetric relief ground flank surface extending in a spiral form along the length of the thread land. Each thread land ha...	07/31/1984
4271554	Combination drill and tap tool An elongated rectilinear tool for formation of a threaded hole in ductile metal by the coining or flowing of the metal. The tool typically is employed to form through threaded holes in a piece of ductile metal, and features a working end having a boring t...	06/09/1981
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
4127355	Wood bit A drill bit for drilling holes of a given diameter in wood or similar material comprising a drill body having a series of stepped cylindrical portions increasing in diameter from the small entry end of the drill to the full diameter of the hole to be dril...	11/28/1978
4074950	Locking thread forming tap A thread forming tap comprising a shank section, a body section extending longitudinally from the shank section, a helical thread formed on the body section and having radially outwardly converging flank portions which define an inclined ramp arranged at ...	02/21/1978
4023914	Locking thread forming tap A thread forming tap comprising a shank section, a body section extending longitudinally from the shank section, a helical thread formed on the body section and having radially converging flank portions which define an inclined ramp area arranged at a pre...	05/17/1977

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Class 408/220 - And relieved cutting edge