| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 408215000 | With pitch-stabilizing ridge | 20 |
| 20120009033 | Releasable Thread Chaser - A pivoting split thread chasing die with fastener is disclosed. In one example, the fastener can include a retainer that captures the fastener within one half of the thread chasing die. The thread chasing die may make it easier for a user to refurbish threads of large bolts and studs. | 01-12-2012 |
| 408217000 | Including cutting teeth of different width | 2 |
| 20110176880 | Screw tap - A screw tap includes a shaft having at least one cutting portion and a drive portion. The drive portion is of a cross-section complimentary to tools adapted to act upon the drive portion. The shaft is provided with a recess extending axially thereof and adapted to receive drive device having a cross-section corresponding to the cross-section of the recess. | 07-21-2011 |
| 20160008902 | DIE STOCK | 01-14-2016 |
| 408219000 | Including tapered section | 2 |
| 20110020087 | THREAD FORMING TAP - A thread forming tap having a complete thread portion, formed with a predetermined back taper with that decreases rotational torque during tapping work, which reduces load acting on first complete protruding portions, formed at an extreme leading end of the complete thread portion, and thereby suppressing degradation in service life of the tool due to wear or the like | 01-27-2011 |
| 408220000 | And relieved cutting edge | 1 |
| 20120230789 | COMPOUND RELIEF TAP - The present disclosure is directed toward a compound relief tap, and more specifically, to a compound relief tap with domains made of a plurality of consecutive threads where each domain has different properties associated with variable thread parameters and variable geometrical arrangements such a variation of a taper angle and relief angles for different portions of domain threads or between domains. In a first embodiment, all of the threads in a domain have a given geometrical arrangement. In a second embodiment, several of the threads of the domain possess the geometrical arrangement. In a third embodiment, only the thread of the domain possesses the geometrical arrangement. And in a fourth embodiment, alternative threads in the domain possess the geometrical arrangement. What is also contemplated is a variation in geometrical arrangement between successive domains for any of these threaded domains. | 09-13-2012 |
| 408222000 | Extending outwardly from tool-axis | 15 |
| 20090074526 | Compound Relief Tap - The present disclosure is directed toward a compound relief tap, and more specifically, to a compound relief tap with domains made of a plurality of consecutive threads where each domain has different properties associated with variable thread parameters and variable geometrical arrangements such a variation of a taper angle and relief angles for different portions of domain threads or between domains. In a first embodiment, all of the threads in a domain have a given geometrical arrangement. In a second embodiment, several of the threads of the domain possess the geometrical arrangement. In a third embodiment, only the thread of the domain possesses the geometrical arrangement. And in a fourth embodiment, alternative threads in the domain possess the geometrical arrangement. What is also contemplated is a variation in geometrical arrangement between successive domains for any of these threaded domains. | 03-19-2009 |
| 20090214311 | Spiral tap - As shown in FIG. | 08-27-2009 |
| 20100092257 | CUTTING TAP AND METHOD OF MAKING SAME - A cutting tap includes a body having an axial forward end and an axial rearward end and a central longitudinal axis. The body has a fluted section at the axial forward end. The fluted section includes a chamfered fluted section extending from the axial forward end of the body and terminating at a first full cutting thread. The chamfered fluted section includes a first cutting thread located a first distance from the axial forward end of the body, and a second cutting thread located a second distance from the axial forward end of the body. The second distance is greater than the first distance. The chamfered fluted section is shaped such that a thickness of a section of material removed by the second cutting thread is smaller than a thickness of a section of material removed by the first cutting thread. A method of making the cutting tap is also disclosed. | 04-15-2010 |
| 20100260566 | SCREW TAP AND METHOD FOR THE PRODUCTION OF A SCREW TAP - This invention relates to a screw tap which is rotatable about a rotational axis and has a number of thread-cutting teeth, which respectively have a radially outer tip cutter and are disposed mutually offset, with a predefined thread pitch, in an arrangement running spirally or helically around the rotational axis. In a lead region adjoining one end of the screw tap axially to the rotational axis, the maximum radial distance of the tip cutters of the thread-cutting teeth from the rotational axis increases with increasing axial distance of the tip cutters from one end of the screw tap according to a predefined radial distance function. At least some of the thread-cutting teeth in the lead region, at least in the region of the tip cutters, respectively have a defined cutter rounding between tool face and tool flank. | 10-14-2010 |
| 20100329806 | FORM TAP AND METHOD OF MAKING SUCH - A form tap includes a shank having a shank length and a thread portion that extends along at least a portion of the shank length. The thread portion includes a finishing portion and a chamfer portion. Each of the finishing portion and the chamfer portion include a plurality of threads and each thread has a crest and a root. The plurality of threads of both the finishing portion and the chamfer portion are spaced apart at a constant pitch, such that a crest-to-crest distance between adjacent threads remains constant along the entire thread portion. | 12-30-2010 |
| 20110076107 | Tap with Dual Relief Technology - The present disclosure is directed to a dual technology relief tap, and more specifically, to a relief tap where a segment on the threaded portion has a first type of relief and the remainder of the threads have a second type of relief or a concentric thread to limit tilt and loosening and ultimately to prevent overfeed or underfeed. In some embodiments, a neutral, negative, positive, convex, or other type of relief is applied generally to most of the threaded portion with or without concentric threads, and a second type of relief of any type, such as a neutral, a negative, a positive, a convex, or other relief, is applied to some selected threads. In another embodiment, the second type of relief is applied to the first threads after the chamfer or are spaced regularly over the threaded surface. | 03-31-2011 |
| 20110085867 | Form Tap Having a Plurality of Lobes - A form tap for tapping an article may include a longitudinal shank having a mounting end opposite a tip, the shank having a shank length, and a thread portion may include a plurality of threads for engaging a surface of the article. The thread portion may also include a first region, a second region and a third region. The form tap may also include a plurality of lobes extending though the first and second regions from the tip to the second region end, the lobes being spaced circumferentially around the shank and lying on a crest circumference. Each lobe may be disposed between respective first and second convex relief portions and each relief portion may be spaced radially inward from the crest circumference. Each lobe has a lobe width, the lobe width at the second region end being greater than the lobe width at the tip. The third region is free of lobes. | 04-14-2011 |
| 20120237308 | TAPPING UNIT WITH PROTECTION MEANS - A tapping unit ( | 09-20-2012 |
| 20130236260 | CHIP-RESISTANT CUTTING TAP - A cutting tap includes a body having an axial forward end and an axial rearward end. The body has a threaded body portion with spiral flutes adjacent the axial forward end, a cylindrical shank portion adjacent the axial rearward end. The threaded body portion includes a chamfered fluted section and a constant diameter section. The threads have a chamfer relief extending radially inward from the cutting edge to a heel of a land. The amount of chamfer relief reaches a maximum value at a point between the cutting edge and the heel, and then becomes smaller between the point of maximum relief and the heel of the land to provide a clearance that reduces the propensity of the tap to chip. | 09-12-2013 |
| 20140119846 | WRENCH-BASED TAP AND DIE HOLDERS - A threading tool, such as a tap or die holder, is configured to be driven by a generic wrench. The tool is provided with a wrench-engageable surface, such as a faceted cylindrical surface, or a cylinder with a polyhedral cross-section perpendicular to its axis. A outwardly extending peripheral flange, downward from the wrench-engageable surface, contacts and allows an open-backed wrench to exert downward force on the tool. A inwardly extending peripheral groove, downward from the wrench-engageable surface, allows a wrench to insert a holding device into the profile of the tool to hold the wrench and tool together. The holder may have a collet that activates the holding function by moving along the axis of the holder, but the collet is prevented from rotating about the axis of the holder. The collet may have a wrench-engageable surface. A collar, threaded to the holder, moves the collet. | 05-01-2014 |
| 20150016911 | SPIRAL TAP - A spiral tap including: a screw portion provided with a male screw; a primary flute in a helical shape formed to intersect with a screw thread of the male screw; and a secondary flute formed in a tip portion in the primary flute at a helix angle smaller than a helix angle of the primary flute, the secondary flute having a positive or negative helix angle of 0 to 3 degrees, the spiral tap further including a cutting edge being formed on a ridgeline between a side wall surface toward a tap rotation direction out of a pair of side wall surfaces of the secondary flute and an outer circumferential surface of the screw portion and having a rake angle of −10 to 0 degrees, and the secondary flute having a flute bottom slope of 5 to 15 degrees. | 01-15-2015 |
| 20160045995 | Method of Making A Cutting Tap with A Correction Grind - A method of making a cutting tap includes: providing an elongate tap body having an axial forward end, an axial rearward end and a central longitudinal axis; securing the axial rearward end of the tap body in a grinding machine; and forming in the axial forward end of the tap body a correction grind and a main flute in one continuous grinding operation. A cutting tap made by the invention is also provided. | 02-18-2016 |
| 20160059334 | THREAD FORMING TAPS - In one aspect, thread forming taps are described herein. In some embodiments a thread forming tap comprises a shank disposed at a first end adapted to engage a tool holder and an elongated working portion disposed at a second end. The working portion comprises at least one helical thread and a plurality of longitudinally-extending linear grooves. The longitudinally-extending linear grooves intersect the helical thread forming a plurality of lobes, wherein adjacent lobes differ from one another in relief type and/or relief rate. | 03-03-2016 |
| 20160059335 | BOLT HOLE WITH IMPROVED THREADS AND TAP FOR MANUFACTURE THEREOF - In a part having a surface, a bolt hole is provided extending into the part from the surface. Threads in the hole have crests with a fishmouth shape at the crests defined by a central concave portion and raised corner portions at ends of the concave portion. At least one start thread preceding the threads with the fishmouth shape crests is provided having a substantially flat crest without the fishmouth shape. A tap for manufacturing the threaded bolt hole has a first thread section and a second thread section. The second thread section has a plurality of threads for creating at least one improved start thread in the hole to be threaded, minor diameters at valleys between the threads of the second thread section being greater than minor diameters at valleys between threads of the first thread section or major diameters at crests of the threads of the second thread section being greater than major diameters at crests of the first thread section. | 03-03-2016 |
| 20160089738 | THREAD-CUTTING TAP - A thread-cutting tap includes: a thread portion having an external thread, and including a chamfered portion and a complete thread portion that is axially adjacent to the chamfered portion; a flute extending from an axially distal end of the tap toward an axially proximal end of the tap; a rake face defined by one of widthwise opposite end portions of the flute; and a cutting edge defined by one of widthwise opposite edges of the flute, so as to be adjacent to the rake face and extend along the flute. The cutting edge is provided with a protrusion portion at least in a radially outer end portion of the chamfered portion, such that the protrusion portion protrudes from the rake face forwardly in the rotation direction and extends along the cutting edge. | 03-31-2016 |
