Having Peripherally Spaced Cutting Edges Patents (Class 408/227)
  • Patent number: 10646934
    Abstract: The negative land includes: a first region in which a space between the upper cutting edge and the lower cutting edge becomes wider toward the outer circumferential surface; and a second region which is continuous to the first region and in which the space becomes wider toward the rotation axis. In a cross section perpendicular to the rotation axis, the rake face includes a return face continuous to the outer circumferential surface, the return face being recessed opposite to a rotation direction of the drill. When a first boundary represents a boundary between the outer circumferential surface and the first region and a second boundary represents a boundary between the first region and the second region, a length of the first boundary is larger than a length of the second boundary in a direction parallel to the rotation axis. The second boundary is continuous to the return face.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: May 12, 2020
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Yuki Tsutsumi, Masaaki Jindai, Hirofumi Tamanishi
  • Patent number: 10456148
    Abstract: A bone broach is formed from a plurality of substantially planar members which are positioned adjacent to each other with each of the substantially planar members attached to at least one other substantially planar member. At least some of the substantially planar members defines at least one cutting profile at its perimeter. The plurality of substantially planar members include a first group of substantially planar members defining planes which are substantially parallel to each other, and at least one additional substantially planar member defining a plane which is angled relative to the planes defined by the first group of substantially planar members.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: October 29, 2019
    Assignee: DEPUY INTERNATIONAL LIMITED
    Inventor: Duncan Young
  • Patent number: 10300535
    Abstract: A drill according to an embodiment of the present invention has a pair of main cutting edges positioned at a front end of a drill body, a pair of first chisel edges each extending from the pair of main cutting edges toward a rotation axis, and a second chisel edge positioned between the pair of first chisel edges and intersecting with the rotation axis of the drill body. When viewing a locus of rotation of the pair of first chisel edges and a locus of rotation of the second chisel edge in a cross section taken so as to include the rotation axis, the respective locus of rotation of the pair of first chisel edges have a rectilinear shape, and respective imaginary straight lines obtained by extending the locus of rotation of the pair of first chisel edges toward the rotation axis are positioned further to a rear end side of the drill body than the locus of rotation of the second chisel edge.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: May 28, 2019
    Assignee: KYOCERA Corporation
    Inventors: Kenichirou Koga, Makoto Ide
  • Patent number: 10213850
    Abstract: A cutting insert for metalworking operations is retained within a cutting insert holder by a resilient tab on the holder that engages a recess on the stem of the insert. The cutting insert and the holder may be fabricated using rapid prototyping techniques such as 3D printing.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: February 26, 2019
    Assignee: KENNAMETAL INC.
    Inventor: Karen Anne Craig
  • Patent number: 10058930
    Abstract: The coupling part, in particular cutting head for a drilling tool for the interchangeable fastening in a coupling receptacle, has a coupling pin which is enclosed by a head support surface, wherein the coupling pin has a plurality of types of functional surfaces, namely stop surfaces for transmitting a torque between the cutting head and the carrier, and clamping surfaces for centering and clamping the cutting head in the coupling receptacle. The coupling pin has an axially front pin region and an adjoining, axially rear pin region, and the clamping surfaces and the stop surfaces are arranged in different pin regions. This decoupling and distribution of the functional surfaces to the various pin regions permits simpler production of the coupling pin and an overall more robust configuration.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: August 28, 2018
    Assignee: KENNAMETAL INC.
    Inventors: Juergen Schwaegerl, Berthold Heinrich Zeug
  • Patent number: 10005136
    Abstract: A drill configured for drilling ductile materials includes a drill margin with a margin extremity adjacent to a relief surface. The drill includes a drill body and a drill head secured to the drill body via rotational coupling of the drill head on the drill body.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: June 26, 2018
    Assignee: Iscar, Ltd.
    Inventors: Eitan Gonen, Anatoly Yanovski
  • Patent number: 9676040
    Abstract: For enabling accurate and efficient cutting work on a narrow area, in a hydraulic chuck configured such that a pressurization fluid pressurized by a push member (8b) is fed through a pressurization passage (8) to a pressurization chamber (6) to reduce a diameter of an elastic deformable part (2b), the hydraulic chuck includes a body (1) having a flange accommodating part (5a) opening at a small-diameter portion at a tip end of the body and a sleeve accommodating part (5b) opening in a bottom face of the flange accommodating part (5a), and a sleeve (2) having a hole (2a) in which a gripped object is inserted, the sleeve being engageable and insertable with/to the sleeve accommodating part (5b) from a leading end side of the flange accommodating part (5a), the sleeve (2) forming the pressurization chamber (6) reserving therein an amount of the pressurization fluid between this sleeve (2) and the sleeve accommodating part (5b), the sleeve (2) having a flange (7) engageable with the flange accommodating part (5a)
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: June 13, 2017
    Assignee: DAISHOWA SEIKI KABUSHIKI KAISHA
    Inventor: Masayuki Doi
  • Patent number: 9370825
    Abstract: The present disclosure provides a quadrangular indexable drill insert comprising a substantially flat top surface and bottom surface, a side surface adjoining the top and bottom surfaces; four identical cutting edges formed at intersection of side surface and top surface, each cutting edge comprising, a concave curved part edge of predetermined radius at corner of the insert; a first part edge oriented towards axis of drill body and is having negative slope, said first part edge is connected to the concave curved part edge through a nose portion; a second part edge connected to first part edge through a transitional edge, said second part edge is tangentially oriented to an imaginary inscribed circle; a third part edge connected to the second part edge through a transitional edge, and a nose portion of adjoining the third part edge with concave curved part edge of succeeding cutting edge.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: June 21, 2016
    Assignee: KENNAMETAL INDIA LIMITED
    Inventor: Karthic Ramesh
  • Patent number: 9085947
    Abstract: A rotary drill bit for engaging an earth strata material includes a cutting insert attached to an axial forward end of an elongate drill bit body. The cutting insert includes an elongate insert body rotatable about a central axis with a pair of symmetrical halves symmetrical about the central axis, each symmetrical half comprising: a leading face; a top surface having a primary relief surface; a web thinning gash extending between the leading face and the primary relief surface, the web thinning gash having a debris evacuation portion centrally disposed adjacent the central axis and a distal transition portion disposed adjacent the debris evacuation portion; a first leading cutting edge at the intersection of the leading face and the primary relief surface; and a second leading cutting edge at the intersection of the web thinning gash and the primary relief surface of the top surface.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: July 21, 2015
    Assignee: KENNAMETAL INC.
    Inventors: Stephen M. George, Nicholas J. Paros
  • Patent number: 9056373
    Abstract: A manufacturing process for a chain tool attached to a bicycle folding tool included the following steps: Material preparing step: a rod with a length is prepared. Manufacturing step: the rod is milled via a milling cutting step to form a chain fixing groove, a detaching portion, an axial groove and a screwing portion, the chain fixing groove having a retaining wall, the retaining wall being milled to form an arc notch, the screwing portion being threaded to form a threaded hole via a drilling and tapping step. Heat treatment step: after the manufacturing process, the rod is heat treated. Sheet metal part assembling step: a sheet metal part is assembled to the chain tool by at least one connecting part; therefore, the chain tool is attachable to the sheet metal part.
    Type: Grant
    Filed: January 1, 2013
    Date of Patent: June 16, 2015
    Assignee: WINRIDE INTERNATIONAL CO., LTD.
    Inventor: Tuo-Jen Chen
  • Publication number: 20150063935
    Abstract: A drill bit configured for use with a rotary power tool including a chuck. The drill bit includes a shank including a first end and a second end, and a paddle that extends from the second end of the shank. The paddle includes a first face including a concave portion, a second face opposite the first face and the second face including a convex portion opposite the concave portion, a cutting surface, a cutting edge located at an end of the cutting surface, a relief angle defined by the cutting surface, and an angled rake face adjacent the cutting surface that defines a rake angle that is between about 5 degrees and about 45 degrees.
    Type: Application
    Filed: May 1, 2013
    Publication date: March 5, 2015
    Applicant: Milwaukee Electric Tool Corporation
    Inventors: Edward S. Lau, Douglas W. Allen, Marc S. D'Antuono, Courtney McCool, Smith C. Theiler
  • Publication number: 20150056032
    Abstract: This document provides novel drills and/or reamers that are well-suited for making holes in a variety of materials including, but not limited to, metals, ceramics, glass, wood, plasterboard, plastics, stone, composites, synthetics, silicon or multi-layered or hybridized substrates. In some embodiments, these drilling devices have some centers of mass that are offset from the axis of rotation. Accordingly, such drills and/or reamers may rotate and cut using a precessional pattern of motion. Precessional cutting devices may display a mechanical wave pattern in relationship to the longitudinal axis of the device. If the cutting device is fabricated from a flexible material, for example Nickel-Titanium, bodily deflection of the device may result during rotation.
    Type: Application
    Filed: August 20, 2014
    Publication date: February 26, 2015
    Inventor: Michael J. Scianamblo
  • Publication number: 20150043983
    Abstract: A drill, such as a spade drill, is provided. The drill includes a drill body that includes a mounting end and a cutting end. The cutting end includes first and second cutting edges that are generally curved along the entirety of the cutting end of the drill body, removing any sort of cutting corner. The curved cutting edge provides a more resilient drill for removing material from a workpiece. The cutting edges may also include a drilling point at a distal end and at least partially between the first and second edges, along with webs extending from the drilling point to the cutting edges. The mounting portion includes structure to attach the drill to a holder, which can connect to a rotating apparatus for rotating the holder and drill.
    Type: Application
    Filed: July 22, 2014
    Publication date: February 12, 2015
    Inventors: Gerald A. Gass, Kenneth L. Kammeyer, Dennis L. Schmidt
  • Publication number: 20150044385
    Abstract: In a method for a finishing work of a spray-coated surface, an inner surface of a cylindrical hollow member is roughened by forming a helical groove thereon. A thermal spray coating is formed on the inner surface that is roughened, and a finishing work is carried out by cutting the thermal spray coating along a helix of the groove by use of a cutting tool. According to the method for a finishing work, a finishing work of a thermal spray coating with non-uniform hardness can be carried out efficiently.
    Type: Application
    Filed: February 28, 2013
    Publication date: February 12, 2015
    Inventors: Takafumi Watanabe, Masatoshi Inoguchi, Kiyokazu Sugiyama, Daisuke Terada, Yoshitsugu Noshi
  • Patent number: 8950985
    Abstract: A rotating tool includes a plurality of elongated members, a cutting edge extending from at least one of the elongated members. A support is attached to each of the elongated members for holding the elongated members at a distance relative to an axis of rotation of the tool. A guiding pad extends radially outwardly from the axis relative to at least one of the elongated members. The tool is particularly useful for reaming operations in which it can be useful to have a tool with a large diameter and/or length.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: February 10, 2015
    Assignee: Seco Tools AB
    Inventor: Alain Durand-Terrasson
  • Patent number: 8931981
    Abstract: In order to allow high-precision machining of the inner surface of a pipe using little machining time, the draw broach has a cutting part having a plurality of cutters extending in the axial draw direction. The cutting part is divided into a main part and an insertion part tapering conically in the draw direction. The insertion part in turn is divided into a front region, viewed in the draw direction, forming a pre-cutting stage, and a rear region, wherein the conicity of the pre-cutting stage is less than that of the rear region.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: January 13, 2015
    Assignee: Kennametal Inc.
    Inventor: Uwe Hobohm
  • Patent number: 8926237
    Abstract: One non-limiting aspect of the present disclosure is directed to a multi-piece twist drill head. The multi-piece twist drill head includes a core piece formed from a first hard material, and a peripheral piece formed from a second hard material. The core piece and peripheral piece each comprise a cutting edge and are adapted to mate to provide a central region and a peripheral region, respectively, of the multi-piece twist drill head. A twist drill including the multi-piece twist drill head is also disclosed.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: January 6, 2015
    Assignee: Kennametal Inc.
    Inventors: X. Daniel Fang, Jean-Luc Dufour, David J. Wills
  • Patent number: 8911183
    Abstract: A cutting insert for a drill of the present invention comprises an upper face having a first side and a second side respectively disposed on both sides of a first corner portion, a bottom face corresponding to the upper face, and a side face located between the upper face and the bottom face. The insert has a first cutting edge formed along the first side, and a second cutting edge formed along the second side. The side face has a first region corresponding to the first cutting edge, a second region corresponding to the second cutting edge, and a third region corresponding to the first corner portion. The third region has an upper region which is adjacent to the first corner portion and disposed toward the upper face, and a lower region located below the upper region. An inclination angle ?3 of the lower region to the bottom face is larger than each of an inclination angle ?1 of the first region to the bottom face and an inclination angle ?2 of the second region to the bottom face.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: December 16, 2014
    Assignee: KYOCERA Corporation
    Inventor: Takashi Okumura
  • Publication number: 20140348606
    Abstract: The invention relates to a reaming tool, comprising a rotationally drivable main body (16) and at least one cutting body (18) fastened thereto. The at least one cutting body has at least one reaming blade (26) at the edge of a rake face (28). According to the invention, a chip-forming step (32) and/or chip-breaking elements (34) are formed in the rake face (28) and the reaming blade (26) has a ground cutting edge (40, 42, 44).
    Type: Application
    Filed: September 17, 2012
    Publication date: November 27, 2014
    Inventors: Roman Eigenmann, Erkan Hodza, Niklas Kramer, Henry Schütt
  • Patent number: 8893593
    Abstract: Some embodiments pertain to a tool that includes a first arm and a second arm that is rotatably connected to the first arm. The first arm includes an opening and the second arm includes a projection that engages threads on a fastener which is installed within the opening in the first arm. During operation of the tool, a fastener is inserted into the opening in the first arm. Pressure is applied to bring the first and second arms together such that the projection engages the threads of the fastener and then deforms the threads. The first arm may include a plurality of threaded openings such that each opening is adapted to receive a different diameter fastener. In addition, the second arm may include a plurality of projections such that each projection is a different size and is aligned relative to one of the openings in the first arm.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: November 25, 2014
    Assignee: Raytheon Company
    Inventor: David W. Homes
  • Patent number: 8882411
    Abstract: A drill of the present invention includes a first cutting edge and a second cutting edge each located at a front end of a cylindrical cutting part; a first flute and a second flute connected to the first cutting edge and the second cutting edge, respectively, in which the first and second flutes are positioned helically from a front end to a rear end on a peripheral section of the cutting part; and a first land and a second land each extended from the front end to the rear end on the peripheral section of the cutting part, in which the first and second lands are being located portions between the first flute and the second flute, respectively. The first flute and the second flute are separately extended from the front end to the rear end. The cutting part includes a first region in which a diameter of an inscribed circle in a cross section perpendicular to a rotation axis of the cutting part increases in a direction away from the front end and toward the rear end.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: November 11, 2014
    Assignee: Kyocera Corporation
    Inventors: Yoshifumi Koike, Hiroshi Ogawa
  • Patent number: 8876445
    Abstract: A guide portion prevents the drilling hole from curving due to a skipping rope phenomenon, and also prevents the inner wall face of the drilling hole from being damaged, so that its surface roughness can be improved. Chip evacuating flutes 4 are formed in the periphery of a drill body 1 which has a stick shape and is rotatable on its axis O, from its front flank 3 toward the rear side. Cutting edges 2A are formed along ridge lines where the front flanks 3 intersect with wall faces 4A which are in the chip evacuating flutes 4 and face in a drill rotational direction T. A cutting edge section 2, where the cutting edges 2A are formed, is provided in the front side of the drill body 1. A cutting edge section 2 has an external diameter which is smaller toward the rear side in the axis O direction than the external diameter D at the cutting edges 2A. A guide portion 6 has a maximum external diameter part 6A at the front periphery side, and is provided to the rear side of the cutting edge section 2.
    Type: Grant
    Filed: September 4, 2009
    Date of Patent: November 4, 2014
    Assignee: Mitsubishi Materials Corporation
    Inventors: Kazuya Yanagida, Koichiro Naruke
  • Publication number: 20140308086
    Abstract: A tool head includes a main body having a nominal diameter, a face end center formed on the main body, and at least two major cutting edges which each run radially outward from and adjoin the face end center. The face end center is formed by a cone of circular cross-sectional area, which cone extends from a cone apex through to a cone base.
    Type: Application
    Filed: April 11, 2014
    Publication date: October 16, 2014
    Applicant: KENNAMETAL, INC.
    Inventors: HERBERT RUDOLF KAUPER, JUERGEN SCHWAEGERL
  • Publication number: 20140294527
    Abstract: A tool head includes an ovoid basic element disposed about a center axis, at least two chip grooves formed in the basic element, and a number of major cutting edges. Each major cutting edge is disposed in a convex course along a respective chip groove of the at least two chip grooves. The major cutting edges define with their radially outermost region a nominal diameter. A radial distance from each major cutting edge to the center axis in a front, tip-side, arc portion increases up to the nominal diameter and in a rear, shank-side, arc portion decreases back down to a minimum diameter.
    Type: Application
    Filed: March 25, 2014
    Publication date: October 2, 2014
    Applicant: KENNAMETAL INC.
    Inventors: MARKUS HIRT, TAMIR PATRIC SHERIF
  • Patent number: 8845244
    Abstract: A drill bit, has a front side (5) and a circumferential surface (19) adjoining the front side (5). The front side (5) has a main cutting edge (7) including a transverse cutting edge (3) extending through a center axis (11) of the drill bit (1), and has two first and second main cutting-edge regions (13, 15) adjoining the transverse cutting edge (9) and extending radially toward the circumferential surface (19). The circumferential surface (19) comprises at least two chip flutes (21, 23), which between them delimit a first and a second web (25, 27), and three lands, of which a first land adjoins the end of the first main cutting-edge region (13) facing away from the transverse cutting edge (9), and serves as a free cutting-edge land (33), and additionally has a free cutting edge (39), a second land adjoins the end of the second main cutting-edge region (15) facing away from the transverse cutting edge (9), and serves as a guide land (35), and a third land serves as a support land (37).
    Type: Grant
    Filed: June 20, 2009
    Date of Patent: September 30, 2014
    Assignee: Mapal Fabrik fur Prazisionswerkzeuge Dr. Kress KG
    Inventor: Ulrich Krenzer
  • Patent number: 8827606
    Abstract: One non-limiting aspect of the present disclosure is directed to a multi-piece spade drill head for a spade drill, wherein the spade drill includes an elongate body portion and a cutting portion removably secured to an end of the body portion. The multi-piece spade drill head includes at least two insert pieces, each piece including a cutting edge. The at least two insert pieces are configured to be removably secured to the body portion of the spade drill adjacent one another and with the cutting edges of the insert pieces aligned to together form a cutting edge on an end of the spade drill.
    Type: Grant
    Filed: July 13, 2010
    Date of Patent: September 9, 2014
    Assignee: Kennametal Inc.
    Inventors: X. Daniel Fang, Jean-Luc Dufour, David J. Wills
  • Patent number: 8784019
    Abstract: A loose top for drilling tools, including front and rear ends, a pair of envelope part surfaces concentric with a center axis, and two chip flutes countersunk in relation to the pair of envelope part surfaces between which two bars project radially from a central core, the front end including a cutting edge and at least one clearance surface positioned rotationally behind the cutting edge, the rear end forming an axial contact surface.
    Type: Grant
    Filed: June 18, 2010
    Date of Patent: July 22, 2014
    Assignee: Sandvik Intellectual Property AB
    Inventor: Helena Päbel
  • Patent number: 8764352
    Abstract: A three-way indexable throwaway tip for deep-hole drilling can be used as a center cutting blade body for a drill head in either whole cutting type or uncut core break-off type applications. The throwaway tip for deep-hole drilling is of a thick plate body having a three-fold symmetry with three cutting sections that are rotationally spaced apart at a central angle of 120 degrees. When mounted on a drill head, one cutting section of the throwaway tip faces a drilling direction. The forward facing blade edge of that cutting section includes an inner blade edge shorter in blade length and an outer blade edge longer in blade length forming an apex. The outer blade edge is composed of two consecutive blade edge portions of a peak-side outer blade edge portion having a smaller outer blade edge angle and a corner-side outer blade edge portion having a larger outer blade edge angle.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: July 1, 2014
    Assignee: Unitac, Incorporated
    Inventor: Takuji Nomura
  • Patent number: 8764353
    Abstract: Embodiments of the invention relate to a reamer for machining a workpiece by chip removal. Embodiments of the reamer can incorporate a holder, having a receiving opening disposed on a workpiece-side end face and having an internal thread, a holder bore extending inside the holder in a longitudinal direction thereof and opening into the receiving opening, an exchangeable head, having a cutting-nose element having a plurality of cutting noses disposed in a distributed manner in a circumferential direction, an exchangeable-head shank having an external thread corresponding to the internal thread disposed in the receiving opening, a bearing contact element disposed between the cutting-nose element and the exchangeable-head shank and having a first bearing contact surface for bearing contact on a first support surface disposed on the workpiece-side end face, with an exchangeable-head bore corresponding to the holder bore extends through the exchangeable head in a longitudinal direction thereof.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: July 1, 2014
    Assignee: Hartmetall-Werkzeugfabrik Paul Horn GmbH
    Inventor: Matthias Oettle
  • Patent number: 8740515
    Abstract: A combination drill bit for use in both hand held drills and stationary drill presses has a shanking end, a working end and a helical flute portion between the shanking and working ends. The helical portion has a helix length (L) of L = ( D × ? tan ? ? ? ) . The drill bit has a core that is tapered from the working end to the shanking end. A web thickness length at the working end is 10% to 35% of the diameter and the thickness length at the junction of the shanking end is 70% to 90% of the diameter. The drill bit is manufactured from a high speed steel including at least 5% by weight of cobalt.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: June 3, 2014
    Assignee: Black & Decker Inc.
    Inventors: Rickey J. Thomas, Florian Probst, Thomas J. Quinn, Abhijeet P. Joshi, Alfons K. Wetzl, Albert Leidl, David N. Johnson
  • Publication number: 20140147224
    Abstract: A cutting insert has a head portion and a coupling portion protruding rearwards from the head portion, along a longitudinal insert axis. The head portion has a base surface at a rearward end thereof, defining a base plane, and two major surfaces. A coupling portion rear surface is longitudinally spaced apart from the base surface and a cylindrical coupling peripheral surface extends between the coupling portion rear surface and the base surface. A resilience slit has two opposite inner walls converging forwards towards a slit inner end terminating at a slit inner end plane. The slit inner end plane is parallel to the base plane and spaced apart therefrom by a longitudinal distance. The inner walls of the resilience slit form an acute slit angle therebetween.
    Type: Application
    Filed: November 26, 2012
    Publication date: May 29, 2014
    Applicant: Iscar, Ltd.
    Inventor: Gil Hecht
  • Patent number: 8734068
    Abstract: A cutting tool having a shaft with a longitudinal axis, wherein the cutting tool includes a first flute extending about the longitudinal shaft along a helix angle and a first cutting edge adjacent the first flute. The cutting tool also includes a second flute extending about the longitudinal shaft along a helix angle and a second cutting edge adjacent a second flute. The cutting tool further includes a third flute extending about the longitudinal shaft along a helix angle and a third cutting edge adjacent the third flute. The first cutting edge, the second cutting edge, and the third cutting edge are unequally angularly spaced from each other.
    Type: Grant
    Filed: August 9, 2010
    Date of Patent: May 27, 2014
    Assignee: Kennametal Inc.
    Inventors: Tilo Ernst Krieg, Christoph Gey, Stephen Michael George
  • Patent number: 8727679
    Abstract: A boring bit includes a shank and a drilling head coupled to the shank. The drilling head includes a center tip and a pair of flanges. Each flange includes a cylindrical sidewall section, a cutting edge extending radially outward from the center tip to the sidewall section, a bottom face extending radially outward from the shank to the sidewall section, a rake face extending axially from the cutting edge to the bottom face, a rearward edge extending radially outward from the shank to the sidewall section and defining a boundary of the bottom face opposite the rake face, a spur extending axially from the sidewall section, and a chip channel defined at least in part by the sidewall section. The sidewall section of each flange extends through a sweep angle from the cutting edge to the rearward edge. The sweep angle is between about 30 degrees and about 60 degrees.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: May 20, 2014
    Assignee: Techtronic Power Tools Technology Limited
    Inventor: Thomas Evatt
  • Patent number: 8727680
    Abstract: A cutting drill includes a shank having a hole and formed to be gripped in a tool holder, and a drill body having a rod shape and locked into the hole of the shank. The shank has an axis around which the drill body rotates. The drill body has a cutting-edge portion forming a tip portion of the drill body and a neck portion having a diameter smaller than a diameter of the cutting-edge portion. The cutting-edge portion has a first cutting-edge portion and a second cutting-edge portion formed between the first cutting-edge portion and the neck portion. The first cutting-edge portion is contiguous to the second cutting-edge portion by a step portion such that the second cutting-edge portion has a diameter which is smaller than a diameter of the first cutting-edge portion.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: May 20, 2014
    Assignees: Ibiden Co., Ltd., Ibidenjushi Co., Ltd.
    Inventors: Susumu Wada, Shunsuke Takeichi, Tomoko Sugiyama
  • Publication number: 20140133931
    Abstract: A drill tool including a drill body having an inner insert and an outer insert at an end portion of the drill body. The distance from a central axis of the drill body to the outer insert is greater than the distance from the central axis to the inner insert. The cutting edges of the inner and outer inserts can be chamfered with the inner insert chambered at a radially inward portion and the outer insert chamfered at a radially outward portion. The inner insert and the outer insert can be mirror symmetric to one another. The inner insert and the outer insert are mounted to the drill body such that an effective cutting length of the inner insert equals an effective cutting length of the outer insert, the effective cutting lengths being measured in a direction perpendicular to the central axis.
    Type: Application
    Filed: July 19, 2012
    Publication date: May 15, 2014
    Applicant: Taegutec, Ltd.
    Inventor: Byung Gyun Bae
  • Patent number: 8708618
    Abstract: A reamer for the precision machining of a drilled hole, having a plurality of cutting bars which are separated from one another by chip grooves and extend in the longitudinal direction of the tool, wherein a plurality of chip divider grooves which run in the transverse direction of the tool and divide each cutting bar into cutting segments are provided.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: April 29, 2014
    Assignee: Kennametal Inc.
    Inventor: Uwe Hobohm
  • Patent number: 8702357
    Abstract: One non-limiting aspect of the present disclosure is directed to a multi-piece spade drill head for a spade drill, wherein the spade drill includes an elongate body portion and a cutting portion removably secured to an end of the body portion. The multi-piece spade drill head includes at least two insert pieces, each piece including a cutting edge. The at least two insert pieces are configured to be removably secured to the body portion of the spade drill adjacent one another and with the cutting edges of the insert pieces aligned to together form a cutting edge on an end of the spade drill.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: April 22, 2014
    Assignee: Kennametal Inc.
    Inventors: X. Daniel Fang, Jean-Luc Dufour, David J. Wills
  • Patent number: 8684640
    Abstract: Reaming tool includes a head and a detachable cutting insert fixed in a seat. The seat includes radial, tangential, and axial support surfaces, while the cutting insert has a mirror-symmetrical polyhedron shape comprising six limiting surfaces, viz. two chip surfaces and at least two clearance surfaces, a number of alternately usable, identical cutting edges formed in transitions between the chip and clearance surfaces. A female- or male-like securing means co-operates with a complementary, male- or female-like securing means in the seat, more precisely in an inactive, contactless state as long as the cutting insert is held pressed by the cutting forces against the axial support surface. The securing means is activatable when the cutting insert is unintentionally distanced from the axial support surface against the action of a clamping member. Tool head and reaming insert for the tool are disclosed.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: April 1, 2014
    Assignee: Sandvik Intellectual Property AG
    Inventor: Per Hansson
  • Patent number: 8651778
    Abstract: A holder of the present invention has a first insert pocket and a second insert pocket at the tip end thereof. The first insert pocket is located closer to the central axis thereof than the second insert pocket. The axial rake of the first insert pocket is larger than the axial rake of the second insert pocket.
    Type: Grant
    Filed: December 27, 2008
    Date of Patent: February 18, 2014
    Assignee: Kyocera Corporation
    Inventor: Takashi Okumura
  • Publication number: 20140023449
    Abstract: A cutting head includes a drill tip having a chisel edge, at least two main cutting edges, each extending between a central end at the chisel edge and an outer end. A recess is associated with each main cutting edge and located at each side of the chisel edge. Each recess includes a chip breaking groove extending along the main cutting edge and spaced from the main cutting edge by a distance. Furthermore, a twist drill has a cutting head and drill tip.
    Type: Application
    Filed: March 27, 2012
    Publication date: January 23, 2014
    Inventors: Kenth-Ove Jonsson, Tommy Wikstrom
  • Publication number: 20130336738
    Abstract: The thread generating tool for producing a thread in a workpiece has the following features: a) the tool is rotatable about a tool axis (A), b) the tool has a number n?1 of groove generating regions for generating in each case one groove in the workpiece and a number m?1 of thread generating regions for generating the thread in the workpiece, c) each of the m thread generating regions is arranged behind one of the n groove generating regions as viewed in an axial projection parallel to the tool axis (A), and has a smaller extent than said groove generating region as viewed in cross section in the axial projection.
    Type: Application
    Filed: December 14, 2011
    Publication date: December 19, 2013
    Inventors: Helmut Glimpel, Dietmar Hechtle, Peter Kopton
  • Patent number: 8579557
    Abstract: [Problem] To provide a drill which enables a great reduction in cutting resistance and easy performance of a drilling operation by human power using a hand drill, a drilling machine, or the like. [Solution] A drill has two cutting edges formed symmetrically with respect to a rotation axis, and is subjected to thinning at the tip thereof. The cutting edge is configured from a thinned cutting edge (1) which extends in a shape including a curved line from a chisel edge to the outer peripheral side of the drill, and a main cutting edge (2) which extends from the end of the thinned cutting edge to the outer peripheral end of the drill when viewed from the tip side of the drill, and a thinned surface formed by the thinned cutting edge is formed into an approximately parabolic shape inclined in a drill axis direction when viewed from the front side of the drill.
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: November 12, 2013
    Assignee: BIC Tool Co., Ltd.
    Inventors: Koichi Arai, Giichi Arai, Katsuyo Kimura
  • Patent number: 8562261
    Abstract: An end mill includes first cutting edges which spiral in a direction defining a positive helix angle and second cutting edges which spiral in a direction defining a negative helix angle, the first cutting edges and the second cutting edges being disposed at positions shifted in a circumferential direction. The first cutting edges and the second cutting edges are each configured to be continuous over an effective cutting edge length. At an axially forward end of the end mill, a first phase angle between one of the first cutting edges and its adjacent second cutting edge located adjacent to the first cutting edges in an opposite direction to a tool rotation direction is set to be different from a second phase angle between the second cutting edge and its adjacent first cutting edge located adjacent to the second cutting edges in the opposite direction to the tool rotation direction.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: October 22, 2013
    Assignee: Sumitomo Electric Hardmetal Corp.
    Inventors: Hisao Oka, Tatsuya Shino, Kazuo Maeda
  • Patent number: 8511946
    Abstract: A boring tool including a body, at least a cutting element mounted to the body, and at least a pad spring mounted to the body.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: August 20, 2013
    Assignee: Rotary Technologies Corporation
    Inventors: Douglas J. Woodruff, Gary W. Pennala, William J. Endres
  • Publication number: 20130209189
    Abstract: A tool shank for use with a cutting insert in a rotary cutting tool includes a body having, and adapted to be rotated about, a central longitudinal tool axis, the body having a tip portion structured to receive at least a portion of the cutting insert therein. The shank also includes a pair of chip flutes formed in the body and a pair of recesses, each recess bordering a respective chip flute. Each recess includes a rim portion extending perpendicular to the tool axis and a bearing surface extending at an incline relative to the tool axis. Each rim portion is adapted to engage a corresponding surface on the cutting insert. Each bearing surface is adapted to engage a corresponding bearing surface on the cutting insert in a manner such that the cutting insert is pulled against the body when the rotary cutting tool is rotated about the tool axis.
    Type: Application
    Filed: February 1, 2013
    Publication date: August 15, 2013
    Applicant: KENNAMETAL, INC.
    Inventor: KENNAMETAL, INC.
  • Publication number: 20130170915
    Abstract: A cutting insert has a first cutting edge provided with a chip breaker suitable for cutting an outermost region of a hole. The cutting insert has a substantially polygonal upper face, a substantially polygonal lower face, and a plurality of side faces extending between the upper face and the lower face. The plurality of side faces include a main side face constituting a flank of a linear cutting edge and a sub side face constituting a flank of a corner cutting edge; the main side face has a relief angle of 0°, the sub side face has a relief angle larger than 0°. A second cutting edge is further provided at an intersection portion between the main side face and the lower face.
    Type: Application
    Filed: February 3, 2013
    Publication date: July 4, 2013
    Applicant: TUNGALOY CORPORATION
    Inventor: TUNGALOY CORPORATION
  • Patent number: 8419322
    Abstract: The invention relates to a rotating cutting tool, in particular a boring tool for use in machine tools. The cutting tool comprises at least one cutting insert, designed as an indexable insert, that has an active main blade located near a corner of the insert, the outer end of said blade defining a circular flight path radius (R) as the blade rotates, said blade penetrating into a work piece at a pre-determined cutting depth (t) near a pre-formed round hole. Also provided is a secondary blade that is disposed opposite to an advancing direction and that aligns with the outermost end of the main blade, the entire length of said blade having a smaller radius than the circular flight path radius (R) of the main blade, wherein a secondary blade free surface aligns with the secondary blade opposite to the direction of rotation.
    Type: Grant
    Filed: July 24, 2009
    Date of Patent: April 16, 2013
    Assignee: Komet Group GmbH
    Inventors: Erkan Hodza, Henry Schuett, Uwe Kretzschmann
  • Patent number: 8408850
    Abstract: A drill for making a hole within a workpiece has a body extending along a longitudinal axis, at least one flute extending along the body, and a drill point extending from the end of the body. The drill point has a periphery and is comprised of a chisel edge, a primary cutting edge extending inwardly from the periphery, a secondary cutting edge extending outwardly from the chisel edge, and a tertiary cutting edge connecting the primary cutting edge with the secondary cutting edge, wherein the tertiary cutting edge has a negative axial rake angle. A method for producing such a drill point is also disclosed wherein in one grinding pass a gash forms the axial rake angle of the secondary cutting edge, and in a separate grinding pass a portion of the secondary cutting edge is removed to produce a tertiary cutting edge having an axial rake angle that is negative.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: April 2, 2013
    Assignee: Kennametal Inc.
    Inventor: Stephen Michael George
  • Patent number: 8398341
    Abstract: The present invention provides a cutting head of a reamer. At least two wiping pads extend rearwardly from a cutting head forward end. At least one cutting section comprises a cutting edge that extends from the cutting head forward end to the peripheral surface. The cutting edge is formed at the intersection of a rake surface and a relief surface. The rake surface is generally tangentially directed and faces a direction of rotation. A deflecting surface is formed adjacent the rake surface and generally transverse thereto. The deflecting surface extends from a rake surface first end in a direction away from the cutting edge. The deflecting surface makes an acute axial angle with respect to the axis of rotation. A rear end of the deflecting surface joins the peripheral surface adjacent the cutting section and distal the rear end of the cutting head.
    Type: Grant
    Filed: August 7, 2008
    Date of Patent: March 19, 2013
    Assignee: Iscar, Ltd.
    Inventor: Tsur Cohen
  • Patent number: RE44915
    Abstract: A drill having a replaceable cutting head, modified to eliminate forces which would distort the pocket of the drill shank and otherwise concentrate stresses which would cause failure of the drill. The cutting head has a frustoconical depending connecting member received in a receptacle formed in the shank. In different embodiments, contact between the pocket formed in the shank and the cutting head connecting member is limited. In one embodiment, angle of drive surfaces is modified from prior art practice. In another embodiment, transition of at curved joints between vertical and horizontal surfaces is made more gradual. The drill preferably has flutes formed collectively by the shank and cutting head when assembled.
    Type: Grant
    Filed: December 17, 2009
    Date of Patent: May 27, 2014
    Assignee: Kennametal Inc.
    Inventor: Filho Ruy Frota de Souza