Patents Represented by Attorney, Agent or Law Firm Larry R. Meenan
  • Tool holder
    Patent number: 7144210
    Abstract: A rotary tool holder includes a shank having a flange, a tapered outer surface, and front and rear contact portions. The tapered outer surface corresponds to the tapered bore of a spindle, and flexible circular cantilevers are provided at one or both contact portions such that a free end of the cantilevers expands radially due to centrifugal force to maintain contact with the tapered bore. The shank can be formed from an inner member and a sleeve disposed thereover, in which portions of the sleeve form the circular cantilevers. The circular cantilevers can also be formed by a cavity created in the shank. Alternatively, instead of circular cantilevers, the shank of the tool holder can have a taper which is optimized for a certain speed, wherein the taper of the shank has a first taper at rest and a different, optimized taper at a desired speed.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: December 5, 2006
    Assignee: Kennametal Inc.
    Inventors: Ted R. Massa, Robert A. Erickson, David R. Siddle
  • Insert retention screw and tool body and insert therewith
    Patent number: 7144205
    Abstract: An insert retention screw has a head with a radius that is a sufficient size to fit within a mounting hole of a cutting insert and seat within a seating plane within the mounting hole that is generally perpendicular to the axis of the insert when the screw is at an angle in a range of about 0–15 degrees. The retention screw is provided for holding a cutting insert in the pocket of a tool body. The pocket is partially defined by a floor and a seating surface. A threaded hole is at an angle that is taken with reference to the pocket floor. The insert has a mounting hole passing therethrough. The retention screw passes through the mounting hole and threads into the threaded hole so as to draw the insert against the seating surface.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: December 5, 2006
    Assignee: Kennametal Inc.
    Inventors: Glenn W. Sheffler, Jeffrey F. Kovac, Kevin M. Gamble, Karen A. Craig
  • Helical end mill type cutter configured to compensate for radial runout
    Patent number: 7134811
    Abstract: An end mill type rotary cutting tool and associated cutting inserts that collectively compensate for radial pocket runout, thereby eliminating overlap marks in a machined work piece. The tool has pockets arrayed in helical flutes such that after one insert has abraded the work piece, a subsequent flute makes an overlapping pass. The inserts are so mounted in the cutting tool and have curved corners configured such that no degree of pocket runout due to manufacturing tolerances will cause any portion of the cutting edge of any insert to form an incuse cut in the work piece which penetrates the machined surface by more than the manufacturing tolerance. Thus overlap of inserts eliminate outward projections in the machined work piece and dimensions and configuration of the inserts and their pockets eliminate inward gouges, thereby eliminating visible overlap marks in the work piece.
    Type: Grant
    Filed: October 24, 2003
    Date of Patent: November 14, 2006
    Assignee: Kennametal Inc.
    Inventors: Mark A. Francis, Kenneth G. DeRoche
  • Cutting tool for rough and finish milling
    Patent number: 7125205
    Abstract: A milling cutter comprises a cutter body having two concentric annular rings. An outer ring is provided for rough milling and includes a plurality of cutting inserts equally spaced about the periphery of a cutter body. An inner finish ring comprises a ring member having a coating of abrasive material. As a result, a workpiece can be milled by a single milling cutter with the rough cutting inserts and then the abrasive material.
    Type: Grant
    Filed: September 4, 2002
    Date of Patent: October 24, 2006
    Assignee: Kennametal Inc.
    Inventor: Glenn W. Sheffler
  • Tool holder with integral coolant channel and locking screw therefor
    Patent number: 7125207
    Abstract: A cutting tool including a cutter body and a locking screw. The cutter body has one or more pockets for receiving one or more cutting inserts and at least one channel for delivering coolant from a milling machine to the cutting inserts.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: October 24, 2006
    Assignee: Kennametal Inc.
    Inventors: Karen A. Craig, Thomas J. Long, II, Filho Ruy Frota de Souza
  • Tool body and cutting insert for metal cutting operations
    Patent number: 7121770
    Abstract: A cutting tool body that is adapted for use in milling operations comprises at least one pocket for supporting a cutting insert. The pocket is defined, at least in part, by a cylindrical wall and a seating surface within the tool body. At least one passage is provided through the tool body for evacuating chips upward and away from the surface of a workpiece. The seating surface of the pocket extends radially inward from the cylindrical wall and intersects the passage through the tool body. At least one slot traverses the pocket to separate a part of the tool body into first and second portions, at least one of which is movable relative to the other for clamping the cutting insert into the pocket.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: October 17, 2006
    Assignee: Kennametal Inc.
    Inventors: Kevin M. Gamble, Thomas J. Long, II
  • Cutting die head
    Patent number: 7118313
    Abstract: A cutting die head that can be set and/or reset without an external mechanism. To this end, the die head includes a die body including a plurality of radially adjustable blocks, each block having a cutter mounted thereon and a radially outwardly facing cam surface. A sleeve surrounds the die body and has an inner surface. The inner surface has a plurality of cam surfaces arranged to communicate with the cam surfaces of the blocks such that axial movement of the sleeve results in radial movement of the blocks. In one embodiment the sleeve is caused to move axially by fluid pressure.
    Type: Grant
    Filed: June 10, 2004
    Date of Patent: October 10, 2006
    Assignee: Kennametal Inc.
    Inventors: Kevin D. Grove, James M. Blitchington, David W. Weathers, Curtis L. Bryant, Sr.
  • Cutting tool configured for improved engagement with a tool holder
    Patent number: 7112020
    Abstract: A cutting tool has a shank with a cylindrical portion that is adapted to fit closely within a tool holder. The shank is adapted to be engaged by a setscrew of the tool holder at a first contact point. A clearance surface is provided opposite the first contact point. The clearance surface terminates adjacent two circumferentially spaced points that make contact with the tool holder upon tightening the setscrew. These contact points are circumferentially spaced from the first contact point angular distances greater than 90 degrees and less than 270 degrees.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: September 26, 2006
    Assignee: Kennametal Inc.
    Inventors: Glenn W. Sheffler, Filho Ruy Frota de Souza
  • Toolholder and toolholder assembly for a cutting insert positioned at a non-conventional height
    Patent number: 7104171
    Abstract: A toolholder has a conventional square shank body with a pocket extending downwardly from the top surface of the body so that the cutting tip of an insert mounted within the pocket is positioned below the top surface of the square shank body. This permits the pocket to have a back wall through which coolant may be introduced and directed against the cutting insert. Typically, the cutting tip of a conventional square shank toolholder is aligned with the top surface of the toolholder. Additionally, a toolholder assembly is disclosed which includes a plurality of such toolholders.
    Type: Grant
    Filed: May 14, 2005
    Date of Patent: September 12, 2006
    Assignee: Kennametal Inc.
    Inventor: William M. Long
  • Twist drill
    Patent number: 7101125
    Abstract: A twist drill including a cutting tip having a front flank face, a substantially cylindrical tool body extending rearwardly from the cutting tip, and a shank. The tool body includes a rotational axis therethrough and at least one flute formed on an outer peripheral surface thereof and extending to the front flank face. The at least one flute includes a first helical portion opening to the front flank face and a second helical portion extending from the rear end of the first helical portion toward the rear portion of the tool body. The second helical portion twists in a direction opposite of the first helical portion.
    Type: Grant
    Filed: December 17, 2003
    Date of Patent: September 5, 2006
    Assignee: Kennametal Inc.
    Inventors: Bernhard W. Borschert, Jerome C. Hanna, Tilo Krieg, Larry R. Meenan, Michael D. Shultz
  • Helical cutting insert with axial clearance slash
    Patent number: 7090444
    Abstract: An indexable, helical cutting insert includes at least one axial clearance slash extending from a bottom surface to one of said side walls forming a wiper on an edge of the axial clearance slash. In another embodiment, the cutting insert includes at least one inside cutting edge that extends outwardly a distance from the side wall. In another embodiment, the helical cutting insert includes at least one progressive cutting edge. In another embodiment, the cutting insert includes at least one helical cutting edge that is curved inwardly to enable the cutting insert to perform machining operations on cutters having different diameters.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: August 15, 2006
    Assignee: Kennametal Inc.
    Inventor: Karen A. Craig
  • Zero centerline toolholder assembly
    Patent number: 7089838
    Abstract: A zero centerline toolholder assembly includes a cutting insert mounted to a toolholder. The center, RC, of the nose radius of the cutting insert is aligned with or lies on a centerline, LT, of the toolholder. The centerline, LT, of the toolholder may be also aligned with a rotational axis, CT2, of a tool spindle. The tool spindle is tilted at an angle with respect to an axis, P, that is substantially perpendicular to a longitudinal axis, LW, of a work piece. As a result of the zero centerline configuration, the radial component of the torque load on the toolholder is virtually eliminated. In addition, the toolholder assembly has a shorter tool length, thereby reducing deflection load on the toolholder.
    Type: Grant
    Filed: January 28, 2004
    Date of Patent: August 15, 2006
    Assignee: Kennametal Inc.
    Inventor: Robert A. Erickson
  • Cutting tool
    Patent number: 7086812
    Abstract: The cutting tool includes a cutter body having at least one pocket therein adapted to receive a cutting insert cartridge assembly. The at least one pocket has a forward wall, a rearward wall and a bottom wall. The bottom wall extends between the forward wall and the rearward wall and is arranged at an angle greater than 90 degrees relative to the forward wall and is arranged at an angle less than 90 degrees relative to the rearward wall. The insert cartridge assembly includes a cartridge and a clamping wedge. The cartridge has a front surface, a rear surface and a bottom surface and an insert pocket for receiving the cutting insert. The bottom surface is shaped to correspond to the bottom wall of the pocket, and the rear surface is shaped to correspond to the rearward wall of the pocket. The clamping wedge is of a dove tail shape and includes a forward wedge surface and a rear wedge surface.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: August 8, 2006
    Assignee: Kennametal Inc.
    Inventors: Kevin M. Gamble, Thomas J. Long, II
  • Dimpled insert with retaining clamp
    Patent number: 7073986
    Abstract: A wear insert for a tool holder includes a top surface and a bottom surface with a dimple disposed in the top surface. A boss is disposed within the dimple. The tool holder for releasably securing the wear insert has a tool holder body including an insert-receiving pocket formed at a forward end. The tool holder body has a bottom and at least one side wall for receiving an insert. The tool holder includes an internally threaded clamp-securing bore formed between an inclined surface and the insert-receiving pocket. A clamp is arranged on the tool holder body and including a lower face with a nose portion having a shaped lip and a clamp contour portion. The clamp also has a threaded aperture formed therethrough. A clamp screw is inserted into the threaded aperture of the clamp.
    Type: Grant
    Filed: November 8, 2001
    Date of Patent: July 11, 2006
    Assignee: Kennametal Inc.
    Inventor: Linn R. Andras
  • Cutting insert for high-speed milling cutter
    Patent number: 7070363
    Abstract: An indexable cutting insert (10) having a top surface (12) including a substantially planar central portion (48), a substantially planar bottom surface (14), and a plurality of side surfaces (16, 18, 20, 22). A long cutting edge (24, 26), a corner radius cutting edge (28, 30), a facet radius cutting edge (32, 34), and ramping cutting edge (36, 38) are defined at an intersection between the top surface (12) and one of the side surfaces (16, 18, 20, 22). A margin (87, 89) extends around a nose radius of the cutting insert (10) and blends into a flat surface (94, 96). A margin angle, C, formed by the margins (87, 89) is less than a seating angle, B, formed by the flat surfaces (94, 96).
    Type: Grant
    Filed: July 15, 2004
    Date of Patent: July 4, 2006
    Assignee: Kennametal Inc.
    Inventors: Thomas J. Long, II, Shawn E. Frye, Karen A. Craig
  • Gear hobbing cutter system
    Patent number: 7059810
    Abstract: A gear hobbing cutter system that includes a cutter head body having a plurality of cartridge-receiving slots arranged in pairs comprising an inside and an outside cartridge-receiving slot. Each pair of inside and outside cartridge-receiving slots are capable of receiving a respective inside and outside cartridge assembly. To ensure that the inside and outside cartridge assemblies are properly positioned within their respective cartridge-receiving slots, one of the dimensions, preferably the length, of the inside cartridge-receiving slot and its respective inside cartridge assembly of a pair is different than the outside cartridge-receiving slot its respective outside cartridge assembly so as to form an error proofing system.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: June 13, 2006
    Assignee: Kennametal Inc.
    Inventors: Mark A. Francis, David M. Hray
  • Cutting insert
    Patent number: D522025
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: May 30, 2006
    Assignee: Kennametal Inc.
    Inventors: Kenneth L. Niebauer, Richard A. Uhal
  • Cutting insert
    Patent number: D522545
    Type: Grant
    Filed: August 26, 2004
    Date of Patent: June 6, 2006
    Assignee: Kennametal Inc.
    Inventor: Kenneth L. Niebauer
  • Cutting insert
    Patent number: D523039
    Type: Grant
    Filed: February 28, 2005
    Date of Patent: June 13, 2006
    Assignee: Kennametal Inc.
    Inventors: Kenneth L. Niebauer, Richard A. Uhal
  • Cutting tool insert
    Patent number: D523040
    Type: Grant
    Filed: October 18, 2005
    Date of Patent: June 13, 2006
    Assignee: Kennametal Inc.
    Inventors: Kenneth L. Niebauer, David C. Johnston