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| Number | Title | Issue Date |
| 8147343 | Tap A tap is designed so that the pollution of the environment can be prevented and the cleaning can be simplified. The tap includes an intake hole having openings at a screw portion of the tap. Air intake is performed through the intake hole, so that the chips generate... | 04/03/2012 |
| 8132989 | Drill A drill achieves a long tool life while improving a property for discharging chips. The drill includes: a columnar body which is rotated about an axis; a plurality of cutting edges each being formed at a tip end portion of the body; and a plurality of thinning edges... | 03/13/2012 |
| 7908897 | Spline rolling tool, and process of manufacturing spline rolling tool A spline rolling tool including a plurality of forming teeth that are to bite into a cylindrical workpiece so as to roll splines in the workpiece. Each of the forming teeth has an incomplete toothed region in which a crest of each forming tooth is removed such that ... | 03/22/2011 |
| 7815402 | Cutting insert for radius cutter and indexable-insert radius cutter fitted with the same A cutting insert is provided with at least a circular-arc blade cutting edge as a cutting edge in the form of a substantially quarter circular arc, at an intersection between a rake face and a flank face, and an outer cutting edge extending from one end portion of t... | 10/19/2010 |
| 7789599 | Drill A drill including a columnar body that is rotated about an axis, a cutting edge that is formed at the tip end of the body, and a thinning edge that is formed continuously with the cutting edge close to the axis of the body, by having a thinning at the tip end of the... | 09/07/2010 |
| 7699565 | Radius endmill A radius endmill has a peripheral cutting edge, a bottom cutting edge, and a rounded corner cutting edges whose ridge line is defined by a circular arc having a given radius as measured in a side view of the endmill that is parallel to the axis. The rounded corner c... | 04/20/2010 |
| 7618219 | Ball endmill A ball endmill having (a) a cylindrical tool body and (b) ball-nosed end cutting edges each of which includes (b-1) a first portion, (b-2) a second portion and (b-3) a third portion. The first portion is defined by a circular arc which is convex in a direction of ro... | 11/17/2009 |
| 7478977 | Ball endmill A ball endmill having a cylindrical tool body and ball-nosed end cutting edges each of which includes a first portion and a second portion continuous to the first portion. The first and second portions are located at a radially inner portion of each ball-nosed end c... | 01/20/2009 |
| 7422396 | Drill having construction suitable for enlarging previously formed hole A drill which includes a cylindrical main body and a shank contiguous to each other, and which is to be rotated about an axis of the cylindrical main body in a predetermined rotating direction, for enlarging a hole previously formed in a workpiece through a die-cast... | 09/09/2008 |
| 7392680 | Rolling die and method for forming thread or worm and spline having small number of teeth by rolling simultaneously There is provided a rolling die and a method for forming a thread or worm and a spline having a small number of teeth whose number is thirteen or less simultaneously by rolling. By use of rolling dies, the formation of a worm by rolling by use of a thread rolling di... | 07/01/2008 |
| 7320566 | Cutting tool including detachable cutter head A cutting tool including a cutter head and a holder. One of the cutter head and the holder has a recess formed in its axial end portion and defined by its circumferential wall. The other of the cutter head and the holder has a protrusion formed in its axial end port... | 01/22/2008 |
| 7293945 | Non-rotary cutting tool and process of machining scroll member by using the same A non-rotary cutting tool which is to be moved relative to a workpiece in a predetermined direction for cutting the workpiece, with its rake face being held substantially perpendicular to the predetermined direction. The cutting tool includes (a) a generally cylindr... | 11/13/2007 |
| 7237992 | Process of machining scroll member by using non-rotary cutting tool A process of machining a scroll member of a scroll compressor by using a non-rotary cutting tool. The non-rotary cutting tool is moved relative to a workpiece in a predetermined direction for cutting the workpiece, with its rake face being held substantially perpend... | 07/03/2007 |
| 7165922 | Cutting tool assembly having construction enabling cutting tool to have large diameter A cutting tool assembly including: (a) an arbor including a tapered shank portion which has a taper of 7/24 and a size of No. 30; (b) a cutting tool having at least one cutting blade and fastened to the arbor; (c) a fastener for fastening the cutting tool to the arb... | 01/23/2007 |
| 6715966 | Rotary cutting tool having corrugated cutting edge portion whose pitch and/or depth are/is increased with increase in diameter of body of the cutting tool A rotary cutting tool which is to be rotated about an axis thereof for cutting a workpiece, including: a generally cylindrical body portion having (a) at least one flute each of which is formed in the cylindrical body portion and each of which extends from an axiall... | 04/06/2004 |
| 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 |
| 6516650 | Rolling dies for producing dog point threads A thread rolling dies for producing dog point threads is capable of preventing slips of an outer surface of screw blank when rolling, thereby avoiding breakage of the dog point thread. The dog point thread has a thread portion provided with external threa... | 02/11/2003 |
| 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 |
| 5379622 | Method of forming helical splines with stoppers on a rotary shaft, and rolling tools for practicing the method In forming helical splines with stoppers on a rotary shaft, its large-diameter portion is held between a pair of rolling tools, each of which comprises: a helical teeth forming die having inclined teeth; an aligning teeth die having aligning teeth which a... | 01/10/1995 |
| 5137407 | Head drive for threaded fastener A threaded fastener having a recess or projection in a head for engagement with a jointing equipment is disclosed. The recess or projection is composed of a center portion and radial portions extending radially outward of circumference of the center porti... | 08/11/1992 |
