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| Number | Title | Issue Date |
| 8186915 | Spiral tap A helical flute has a constant lead part and a gradually increased lead part. The constant lead part has an axial length ranging from 0.3×LA to 1.2×LA and includes at least entirety of a leading part, so that the cutting performance of a cutting edge at the leadin... | 05/29/2012 |
| 8087856 | Double helix thread cutting tap The invention includes a double helix thread cutting tap with both right-handed and left-handed helical chip removal flutes. The double helix thread cutting tap places a positive rake angle on all sets of thread cutting teeth for optimum performance and minimal cutt... | 01/03/2012 |
| 8052360 | Self-aligning thread tap and method of utilizing the same to tap existing bore holes A self-aligning tap is used to produce correctly aligned new threads in an existing smooth bore hole. The design of the tap's shank, flutes, and cutting surfaces is that of commonly used existing taps. The flat end of the tap—the end that enters the existing bore ... | 11/08/2011 |
| 7950880 | Spiral flute tap A cutting tool that includes an elongate body that has a forward end and a rearward end. The elongate body has a fluted portion that beginning near and extends in a rearward direction from the forward end. The fluted portion has a flute that defines a cutting edge. ... | 05/31/2011 |
| 7665934 | Cutting tap and method of making a cutting tap A cutting tap that has an elongate tap body with a fluted section at the axial forward end thereof wherein the fluted section includes a chamfered fluted section and a finishing fluted section. Each cutting thread in the chamfered fluted section has a cutting face d... | 02/23/2010 |
| 7553114 | Thread cutting tap and a method of its manufacture A thread cutting tap having a threaded portion for cutting out a thread in a wall of a workpiece opening into which the threaded portion is to be introduced. The threaded portion is provided with at least two cutting edges extending in a circumferential direction of... | 06/30/2009 |
| 7367754 | Variable helix rotary cutting tool A rotary cutting tool has a substantially cylindrical main body and four flutes. The main body has a shank end, a cutting end formed integrally opposite the shank end, and a longitudinal axis of rotation. The four flutes include a pair of flutes comprising a first f... | 05/06/2008 |
| 7357606 | Self-advancing step-tap tool Methods and tool for simultaneously forming a bore in a work piece and forming a series of threads in said bore. In an embodiment, the tool has a predetermined axial length, a proximal end, and a distal end, said tool comprising: a shank located at said proximal end... | 04/15/2008 |
| 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 |
| 7214009 | Drilling tool A drilling tool consisting of a drill shank having a drill point and of a transition section which adjoins the drill shank in the axial direction and which merges into a clamping shank, the transition section being heat-treated in such a way that it has higher bendi... | 05/08/2007 |
| 7207755 | Tool arrangement and tool for chip removal In a cutting tool arrangement and a tool for chip removing machining, the cutting tool arrangement comprises a tool, fastening arrangement, and a shank. The tool is a one-piece unit. The axial channel is of non-circular cross-section to provide a key grip. An end of... | 04/24/2007 |
| 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 |
| 7192446 | Interbody fusion device with anti-rotation features An improved interbody fusion device incorporating anti-rotation features to inhibit accidental screwing or unscrewing of the fusion device in an intervertebral disc space. One such feature is a thread pattern having a crest diameter that increasingly tapers from a s... | 03/20/2007 |
| 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 |
| 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 |
| 7147413 | 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 ... | 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 |
| 7143490 | Tap process for hard workpieces A process and apparatus for producing screw threads in hard material workpieces with a series of taps. The present invention employs a threaded bore formed in a bracket assembly to align and position multiple taps on a rotary machine. The taps are used in sequence t... | 12/05/2006 |
| 7140815 | Drill for making flat bottom hole The present invention is directed to a helical drill configuration that allows substantially flat bottomed holes to be machined. At the cutting end of the body member, there are at least two cutting edges that are symmetrically oriented on apposing sides of the rota... | 11/28/2006 |
| 7140825 | Self tapping bolt A self tapping bolt which fastens a mounting member and a receiving member while the bolt cuts internal threads on an inner surface of a tap drill hole prepared in the receiving member. The bolt includes at least one groove formed near an end of a threaded portion o... | 11/28/2006 |
| 7134812 | Tool coolant application and direction assembly A coolant assembly for supplying coolant fluid to a tool includes an outer ring defining an inlet and an insert pressed within the outer ring including an annular channel. The annular channel is in communication with the inlet defined by the outer ring and includes ... | 11/14/2006 |
| 7114891 | Thread forming tool with annular ridge A thread forming tool includes an elongated body defining a longitudinal center axis. The body including a thread forming portion formed by one or more annular ridges oriented perpendicular to the axis. The body has a non-circular shape in a cross sectional plane or... | 10/03/2006 |
| 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 |
| 7107664 | Screw thread cutting apparatus and method A thread cutting milling tool comprises a shank with a working portion formed with a recess for receiving a thread cutting insert. The thread cutting insert has one edge formed with a line of thread-form teeth of identical profile. The thread cutting teeth project l... | 09/19/2006 |
| 7073988 | Threaded tool with coolant supply A threading tool for generating a thread in a workpiece, includes a threading part which defines a longitudinal axis. A cooling channel extends inside of the threading part along the axis to a front end surface thereof for supplying a coolant. Longitudinally extendi... | 07/11/2006 |
| 7044692 | Screw thread cutting apparatus and method A thread cutting milling tool comprises a shank with a working portion formed with a recess for receiving a thread cutting insert. The thread cutting insert has one edge formed with a line of thread-form teeth of identical profile. The thread cutting teeth project l... | 05/16/2006 |
| 7014397 | Self-aligning handheld tapping tool A self-aligning tapping tool comprises an elongate handle having a longitudinal counterbore through a first end. A tap is received in the counterbore. A collar is operatively secured to the tap. The collar is slightly smaller than the counterbore to enable slidable ... | 03/21/2006 |
| 6929024 | Threaded device for removing a fractured cartridge from a valve body An improvement for use with a hand operated wrench primarily intended for removing a cartridge from an opening, with such wrench having a slotted aperture at one end. This improvement comprises an elongate threaded device having a mounting shaft at one end, and tape... | 08/16/2005 |
| 6922933 | Primer removal tool A primer removal tool comprising a starter tap, a holder for the starter tap, one or more setscrews passing through the holder and against the starter tap for securing the starter tap in the holder, a handle, a spacer bushing connected to the center of the handle, a... | 08/02/2005 |
| 6921236 | Tool for repairing damaged threads A tool for rethreading a damaged threaded object having a solid body with at least one through bore including at least one cutting tooth. A slot intersects the through bore, allowing relief for shavings removed from the object as it is rethreaded. The tool can be ad... | 07/26/2005 |
| 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 |
| 6840718 | Threaded hole finishing tool A finishing tool rides upward and downward on the surface of a tap. A spring urges the finishing tool toward an outer end of the tap. The finishing tool is guided along a helical flute on the surface of the tap. Cutting edges on the finishing tool are ground to debu... | 01/11/2005 |
| 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 |
| 6685573 | Thread forming tap A thread forming tap which is capable of reducing tapping torque as well as improving durability by avoiding an increase of an apparent area of margins of external thread that causes interference with a grinding stone. The thread forming tap has an extern... | 02/03/2004 |
| 6663326 | Cutting tip and manufacturing method thereof A cutting tip having a three-layer laminated structure is provided. The tip is made from a disc-shaped three-layer laminate wherein a second layer consisting of a hard sintered compact of CBN or diamond is sandwiched by a first layer and a third layer con... | 12/16/2003 |
| 6626616 | Tapping tool for PVC pipes and fittings A tapping tool for repairing damaged threads on PVC pipe and PVC pipe fittings (e.g. T-connectors, elbows, etc.) includes an elongate shaft with a handle member fixed to a proximal end and a head fixed to an opposite distal end. A threaded tap formed of h... | 09/30/2003 |
| 6554550 | Tandem tap and method for cutting screw threads A tandem tap for cutting screw threads into a bore comprises straight flutes with a spiral point along the front section for pushing the chips generated thereby forward and spiral flutes along the rear section for removing the chips generated thereby rear... | 04/29/2003 |
| 6499920 | Tap A cutting tap comprises a threaded portion including a lead whose thread diameter gradually decreases toward a front end of the lead, a complete thread portion continued from the lead, and four flutes arranged at equal intervals in a circumferential direc... | 12/31/2002 |
| 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 |
