With Central Lead Patents (Class 408/225)
  • Patent number: 10993728
    Abstract: An orthopedic drill bit includes a cutting head formed to include diametrically opposed cutting lips leading to a central point and away to a radiused periphery to center said bit. The drill includes flutes extending from a cutting end, said flutes having a dulled periphery to prevent out of round holes. The flute design increases in width progressively from the tip up the shank, to maintain an adequate and unrestricted space for chips to easily move upward, preventing the chips from being compressed into a smaller opening while maintaining the tapered depth of the flutes for strength.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: May 4, 2021
    Assignee: Maestro Logistics, LLC
    Inventor: Gary Reed
  • Patent number: 10744573
    Abstract: A method for enlarging each one of an initial pair of holes, which includes a first hole, extending through a first component, and a second hole, extending through a second component, includes inserting a pilot member, corresponding to a tolerance of misalignment of the first hole and the second hole of the initial pair of holes, such that pilot member passes through a clearance gap, defined by at least a portion of a boundary of first hole and at least a portion of a boundary of second hole with pilot member having a first central axis. The method also includes cutting a second pair of aligned holes through first and second components, respectively, with a cutter section, which has a second central axis.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: August 18, 2020
    Assignee: THE BOEING COMPANY
    Inventors: John P. Scheibel, James L. Scherer, Michael A. Ward
  • Patent number: 10549381
    Abstract: A system for producing components by hot stamping includes a laser cutting station for cutting a plate from a supplied steel-sheet material. The plate has at least one of a predetermined edge-contour and a predetermined cut-out portion for forming a shape of the component. The plate is stored in a storage station, and is subsequently transferred to a furnace station for heating the plate to a predetermined deformation temperature. A press having a hot stamping tool forms the plate into the shape of the component. The system also includes a measuring station disposed downstream of the press for obtaining measurement data relating to the shape of the component that is formed from the plate. The measurement data obtained using the measuring station is provided to a control module of the laser cutting station via a feedback loop.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: February 4, 2020
    Assignee: Magna International Inc.
    Inventor: Thomas Meichsner
  • Patent number: 10343223
    Abstract: The invention relates to a rotary tool, in particular a drill (2), which extends along a longitudinal axis (4), having an end face (6); a center (12); at least two main cutting edges (8), each of which extends from the center (12) outwards towards a cutting corner (10); a flute (20) associated with each main cutting edge (8), a flank on the end face (18), associated with each main cutting edge (8); a rake angle (?) between the respective main cutting edge (8) and the flute (20); a ground face (26) which forms a point thinning (30) in the area of the center (12), extends into a radially outer area and defines the rake angle (?) in the area of the main cutting edge (8). The rotary tool is characterized in that the rake angle (?) formed by the ground face (26) is constant along the main cutting edge (8), and the flank (18) of the other main cutting edge (8) is formed by the ground face (26). An advantageous, excellent cutting behavior is thereby achieved along the main cutting edge (8).
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: July 9, 2019
    Assignee: KENNAMETAL INC.
    Inventors: Tim Guter, Peter Sollfrank
  • Patent number: 9643259
    Abstract: An adjustable drill has a drill body having a face surface with a directional feature provided therewith. At least one cartridge is mounted adjacent the face surface and selectively slidable along the directional feature to provide adjustment. At least one insert is releasably affixed in an insert pocket provided in the cartridge. In further examples, the adjustable drill may have a central cutting system in combination with the adjustable cartridge type system, wherein the central cutting system may be modular. There may also be provided a modular type of holder arrangement to provide flexibility to adapt the system for various applications.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: May 9, 2017
    Assignee: ALLIED MACHINE & ENGINEERING CORP.
    Inventors: Mark D. Meyer, Kevin D. Myers
  • Patent number: 9604285
    Abstract: A rotary tool, in particular drilling tool, extends along a longitudinal axis and has an end surface; a brad point; and at least one major cutting edge extending outward up to an edge corner. A first free surface segment adjoins the major cutting edge, and a second free surface segment in turn adjoins said first free surface segment. To keep the stress, in particular the wear, low in the region of the end surface, the first free surface segment has a lower average abrasiveness than the second free surface segment.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: March 28, 2017
    Assignee: KENNAMETAL, INC.
    Inventors: Juergen Schwaegerl, Herbert Rudolf Kauper
  • Patent number: 9452502
    Abstract: A tool and a method are provided for processing a workpiece. A housing is provided having a base, an exterior and an interior. A first inlet port is provided on the exterior of the housing and the first inlet port is in fluid communication with the interior of the housing. A first outlet port is provided on the exterior of the housing and the outlet port is in fluid communication with the interior of the housing and the first inlet port. A cutter is rotatably supported within the housing.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: September 27, 2016
    Assignee: The Boeing Company
    Inventor: Gary Eugene Jones
  • Patent number: 9333564
    Abstract: An elongated drill bit has a shank at one end and working end at the other. A flute portion is between the working end and the shank. The flute portion is continuous with the shank and working end and is generally unitarily formed with them. The flute portion has at least one flute with a helix angle between approximately 30° and 35°. The working end has a pilot tip with a cutting portion. A tapered web is formed in the flute portion, a thickness of the web at the tip of the working end is about 9% to 15% of the nominal diameter.
    Type: Grant
    Filed: August 19, 2014
    Date of Patent: May 10, 2016
    Assignee: BLACK & DECKER INC.
    Inventors: Aland Santamarina, Glen V. Steinbrunner, David N. Johnson
  • Patent number: 8979444
    Abstract: A cutting bit adapted to cut wood or metal is disclosed.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: March 17, 2015
    Assignee: Robert Bosch GmbH
    Inventor: Hagen W. Dost
  • Patent number: 8979445
    Abstract: A rotary cutting tool includes a first end defined by a cutting profile and structured to perform cutting operations on a workpiece. The cutting tool also includes an opposite second end structured to be mounted in a machine tool, a central longitudinal axis extending between the first and second ends, and a generally cylindrical body disposed about the central longitudinal axis between the first end and the opposite second end. The cutting profile includes a first portion adjacent the central longitudinal axis and disposed generally at a first angle relative to the central longitudinal axis; a second portion adjacent the first portion and disposed generally at a second angle relative to the central longitudinal axis; and a third portion adjacent the second portion and disposed generally at a third angle relative to the central longitudinal axis. The second angle is greater than both the first and third angles.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: March 17, 2015
    Assignee: Hanita Metal Factory Ltd
    Inventors: Karthik Sampath, Vladimir Volokh
  • Publication number: 20140356088
    Abstract: An elongated drill bit has a shank at one end and working end at the other. A flute portion is between the working end and the shank. The flute portion is continuous with the shank and working end and is generally unitarily formed with them. The flute portion has at least one flute with a helix angle between approximately 30° and 35°. The working end has a pilot tip with a cutting portion. A tapered web is formed in the flute portion, a thickness of the web at the tip of the working end is about 9% to 15% of the nominal diameter.
    Type: Application
    Filed: August 19, 2014
    Publication date: December 4, 2014
    Inventors: Aland SANTAMARINA, Glen V. STEINBRUNNER, David N. JOHNSON
  • 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: 8764355
    Abstract: A step drill bit comprises a body. A cutting edge insert is removably attached to the body. The body may be made of a first material and the cutting edge insert may be made of a second material where the second material is different than the first material. The cutting edge insert may define a plurality of progressively larger cutting diameters.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: July 1, 2014
    Assignee: Irwin Industrial Tool Company
    Inventor: Laverne R. Durfee
  • 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: 8622666
    Abstract: An adjustable step drill bit with a plurality of cutting disks held in compression on a shaft between two stops. The cutting disks may be arranged in various configurations. Spacers may also be provided on the shaft with the cutting disks. A method of drilling a hole utilizing the drill bit to drill a pilot hole and allowing for the drill bit to be used in a pulling technique.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: January 7, 2014
    Assignee: Combined Producers Co. #1 Inc.
    Inventor: Ira Kozak
  • Patent number: 8579556
    Abstract: An insert for a drill, a drill using the insert for a drill, and a method of cutting a work material are provided.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: November 12, 2013
    Assignee: Kyocera Corporation
    Inventor: Takashi Okumura
  • Patent number: 8545140
    Abstract: A drill bit for drilling holes in wood or the like has a spade cutting element, a thick elongate shaft and a shank adapted to be inserted into an SDS drill chuck. In a preferred embodiment, the shaft is provided with one or more ridges extending helically along most of its length, to strengthen and stiffen the shaft and to direct drilling debris away from the cutting element. The shaft has a diameter greater than or equal to that of the shank. The drill bit may be installed in and removed from the drill chuck more rapidly than conventional wood bits, is more robust and is more convenient and reliable in use.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: October 1, 2013
    Inventor: Steve Burn
  • Patent number: 8506213
    Abstract: In the case of a cutting insert, in particular for counterboring and/or countersinking operations, the cutting insert has two longitudinal sides and two narrow sides between an upper side and an underside. A cutting edge is formed between one longitudinal side and one narrow side and runs obliquely in relation to the underside and extends over at least approximately the entire depth of the cutting body. A cutting face running between the upper side and the underside is provided in the longitudinal side that is facing the cutting edge.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: August 13, 2013
    Assignee: Kennametal Inc.
    Inventor: Peter Karl Mergenthaler
  • Publication number: 20130189044
    Abstract: A wood drill bit has a plurality of step sections where each step section has at least one flute that terminates in a cutting edge. The effective diameter of each of the plurality of step sections is different than the diameter of the other of the plurality of step sections such that a single bit may be used to bore holes in wood of different diameters.
    Type: Application
    Filed: January 18, 2013
    Publication date: July 25, 2013
    Inventors: LaVerne R. Durfee, Ryan F. Hall
  • Patent number: 8469642
    Abstract: A modular countersink assembly, comprising a drill having an exterior tapered surface, a countersink body having an interior tapered surface for mating with the exterior tapered surface of the drill, and an insert removably secured to the countersink body enables an operator to replace either the drill and/or the insert if one or the other or both become worn. The insert is positioned both axially and radially and may have a PCD cutting edge.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: June 25, 2013
    Assignee: Precorp, Inc.
    Inventors: Richard M. Garrick, John A. Bunting, David J. Preece
  • Publication number: 20130121778
    Abstract: A process for producing a tool having a main body which extends in a longitudinal direction and at least one blade for machining a workpiece includes providing a base coating on the tool; grinding the at least one blade in a manner that removes the base coating in the region of the at least one blade; and providing a second, fine coating, to the at least one ground blade.
    Type: Application
    Filed: November 14, 2012
    Publication date: May 16, 2013
    Applicant: KENNAMETAL, INC.
    Inventor: Kennametal, Inc.
  • Patent number: 8388280
    Abstract: A step drill bit includes a shaft for coupling the step drill bit to a drill and a drill bit portion coaxially coupled to the shaft. The drill bit portion has a plurality of step portions. The drill bit portion may further include three cutting edges wherein the cutting edges are spaced around the drill bit in substantially equal arc angles. The step drill bit further includes surface treatment having a first coating formed of first material and a second coating formed of a second material that is applied over the first coating. The step drill bit further includes a replaceable drill bit tip.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: March 5, 2013
    Inventors: Orlo D. Ison, Brandon Ray
  • Patent number: 8366357
    Abstract: A spade bit includes a shaft defining an axis about which the spade bit is configured to be rotated. The space bit also includes a blade attached to the shaft and having a first paddle portion and a second paddle portion. In addition, the spade bit includes a tip portion attached to the blade and aligned with the axis. The first paddle portion includes (i) a first leading end portion positioned on a first side of the axis and configured to define a first cutting edge portion, and (ii) a first lateral extension portion configured to define a first sloping surface. The first paddle portion defines a first relief space positioned adjacent to both the first sloping portion and the first leading end portion. The second paddle portion includes (i) a second leading end portion positioned on an opposite second side of the axis and configured to define a second cutting edge portion, and (ii) a second lateral extension portion configured to define a second sloping surface.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: February 5, 2013
    Assignee: Robert Bosch GmbH
    Inventors: Hagen W. Dost, Javier I. Sandoval
  • Patent number: 8353645
    Abstract: A counterbore bit having a blade with paired cutting edges along the distal end of the blade and a circular pilot with a serrated cutting edge positioned medially between the paired cutting edges can be positioned over an embedded nail or fastener and activated to free or clear the embedded nail by creating a pair of concentric bores around and about the nail thus facilitating its extraction by conventional means.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: January 15, 2013
    Inventor: Craig M. Laun
  • Patent number: 8342781
    Abstract: A drill body for chip removing machining, including a rotationally symmetrical envelope surface and front and rear ends between which a center axis extends, around which the envelope surface is rotatable in a predetermined direction of rotation. A head is formed in the front end that includes two cutting edges, each one of which includes a first part edge and a second part edge. The first part edge is included in a central tip part having a front end portion situated along the center axis. The second part edge extends between a peripheral end point positioned along the envelope surface and a radially inner end point where the second part edge transforms into the first part edge. The two first part edges converge at a positive nose angle (?) in an axially forward direction, and the two second part edges diverge at a negative angle (?) in the axially forward direction.
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: January 1, 2013
    Assignee: Sandvik Intellectual Property AB
    Inventor: Kari Soittu
  • Patent number: 8262325
    Abstract: A bit including a shaft defining an axis about which the bit is configured to be rotated. The bit further includes a blade having a first end attached to the shaft and an opposite second end, the blade further having (i) a first blade portion including a first shoulder defining a first cutting edge portion at the second end of the blade, and (ii) a second blade portion including a second shoulder defining a second cutting edge portion at the second end of the blade. The bit additionally includes a frusto-conically-shaped tip portion having an apex and being attached to the second end of the blade. The frusto-conically-shaped tip portion includes threads extending from the apex to a location adjacent to the first cutting edge portion and the second cutting edge portion.
    Type: Grant
    Filed: October 9, 2008
    Date of Patent: September 11, 2012
    Assignee: Robert Bosch GmbH
    Inventors: Hagen W. Dost, Javier I. Sandoval, Patrick M. McAuliffe, Creighton W. Nachtigall, Kenneth C. Osberg
  • Publication number: 20120219371
    Abstract: A segmented orbital drill includes a segmented portion with a semi-finishing cutting portion and a plurality of finishing cutting portions. The semi-finishing cutting portion and finishing cutting portions are separated by grooves formed by a front wall and a rear wall. The segmented portion allows for a fresh cutting edge (i.e., rear wall of the groove) to be revealed as the orbital drill wears in the axial direction. The segmented portion also causes less contact with the workpiece, which reduces power consumption and minimizes deflection of the orbital drill. The segmented orbital drill also includes an optional pilot at one end of the drill, and a clearance neck portion between a shank and the segmented portion. A method of machining a workpiece using the segmented orbital drill is also disclosed.
    Type: Application
    Filed: February 24, 2011
    Publication date: August 30, 2012
    Applicant: KENNAMETAL INC.
    Inventor: Karen Anne Craig
  • Publication number: 20120155977
    Abstract: Material removal tool (100), such as for forming surfaces of valve seats, includes an integral or separable reduced diameter circumferential insert housing (106) including a plurality of inserts (120) bonded thereto. The plurality of inserts (120) include cutting surfaces (122) at different axial and radial positions relative to the axis (112) of the material removal tool (100). Cutting surfaces (122) at different axial and radial positions are arranged at different angles to the axis (112), and at least one cutting surface (122) on at least one insert is at an angle of about 45 degrees relative to the axis (112). Cutting surfaces (122) can be located on one insert-type or different insert-types and can have different combinations of cutting surfaces (122). When arranged circumferentially on the insert housing (106), a N-effective material removal tool (100) is formed. Methods of machining using the N-effective material removal tool (100) is also disclosed.
    Type: Application
    Filed: June 23, 2010
    Publication date: June 21, 2012
    Inventors: Kevin Nedzlek, Richard S. Green
  • Publication number: 20120093600
    Abstract: A rotary cutting tool for performing hole-cutting operations on a workpiece includes a first end structured to engage and perform cutting operations on the workpiece. The first end is defined by a cutting profile. The cutting tool also includes an opposite second end structured to be mounted in a machine tool, a central longitudinal axis extending between the first and second ends, and a generally cylindrical body disposed about the central longitudinal axis between the first end and the opposite second end. The cutting profile comprises a first portion adjacent the central longitudinal axis and disposed generally at a first angle relative to the central longitudinal axis; a second portion adjacent the first portion and disposed generally at a second angle relative to the central longitudinal axis; and a third portion adjacent the second portion and disposed generally at a third angle relative to the central longitudinal axis. The second angle is greater than both the first and third angles.
    Type: Application
    Filed: October 15, 2010
    Publication date: April 19, 2012
    Inventors: KARTHIK SAMPATH, VLADIMIR VOLOKH
  • Patent number: 8157488
    Abstract: Shaft tool with an adjustable cutting diameter, which permits improved handling. A rotating shaft tool, in particular a multi-stage reamer, with a first shaft part, equipped with a first cutting head comprising e.g. several cutting blades and a recess in the first shaft part, in which a second shaft part is positioned in the axis of the first shaft part, the second shaft part having a second cutting head with e.g. several blades and the diameter of the first cutting head being adjustable. The second shaft can be rotated in the first shaft part and the rotation in relation to one another creates a fixed connection between the shaft parts. This permits the connection between the two shaft parts and thus in particular the diameter of the first cutting head to be modified even though the shaft tool is inserted into e.g. a spindle of a machine tool.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: April 17, 2012
    Assignee: Guehring OHG
    Inventor: Roland Schäfer
  • Patent number: 8147174
    Abstract: The drill bit comprises a cutting blade formed at one end of a shank. The cutting blade has a pair of cutting shoulders that extend inwardly from the outer sides of the blade toward the bit axis. A tip having converging sides that create a point extends from the shoulders. The cutting edge of each shoulder is beveled with respect to the plane of the face of the blade. A flute is provided on the leading portion of each blade face adjacent the cutting edges. Each flute is a smooth curve that creates a substantially uninterrupted recess on each face of the blade that facilitates chip removal, increases the drill rate and lowers the power required to drill a hole. A non-stick coating may be applied to the blade to further facilitate chip removal.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: April 3, 2012
    Assignee: Irwin Industrial Tool Company
    Inventor: Laverne R. Durfee
  • Patent number: 8070398
    Abstract: A shank that has one end adapted to be connected to a chuck of a rotary tool. The opposite end of the shank supports a cutting head having a series of teeth formed on the edge thereof for cutting the periphery of the hole. A screw tip may be provided for feeding the bit into and through the wood. A plurality of cutting blades are provided for boring the interior of the hole. The cutting blades define a plurality of cutting edges that are disposed at different angles to a plan perpendicular to the axis of rotation.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: December 6, 2011
    Assignee: Irwin Industrial Tool Company
    Inventor: LaVerne R. Durfee
  • Patent number: 8070397
    Abstract: The self feeding drill bit comprises a shank that has one end adapted to be connected to a chuck of a rotary tool such as a drill or power driver. The opposite end of the shank supports a cutting member where the cutting member is a cup shaped member having a series of teeth formed on the edge thereof. A screw tip is provided for feeding the cutting member into and through the wood. A removable cutting blade is provided for boring the interior of the hole. A kit including a self feed bit and a plurality of replacement bits is also provided.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: December 6, 2011
    Assignee: Irwin Industrial Tool Company
    Inventor: LaVerne R. Durfee
  • Patent number: 8052359
    Abstract: A countersink assembly including a countersink sleeve body with a distal cutting edge, a longitudinal bore to receive and secured to a drill bit, and a flute extending from the distal cutting edge. A depth stop collar having a longitudinal bore is disposed on and secured to the countersink sleeve body. In an example embodiment, the longitudinal bore of the depth stop collar includes at least one passage for chip egress. In addition or in the alternative, the flute includes a flat surface and a part cylindrical surface extending from the distal cutting edge along the length of the flute at an angle to the longitudinal bore of the countersink sleeve body so as to present a slight down-cut spiral.
    Type: Grant
    Filed: January 5, 2009
    Date of Patent: November 8, 2011
    Assignee: Woodworker's Supply, Inc.
    Inventors: John Wirth, Jr., Jay L. Sanger, Paul Brutsman, Mark K. McCool
  • Publication number: 20110262235
    Abstract: A reusable low cost drill bit element for operative, removable attachment to a turning implement for drilling anchor installation holes, particularly of at least ½? diameter, in drywall. The drill bit is comprised of a section to be engaged with the turning implement and to be turned therewith, a drilling section with angled step sections in common planes perpendicular to the drill bit axis to perpendicularly bore into the drywall and form a perpendicular through aperture of a desired diameter, and an element to prevent the drill bit from falling behind the wall so that it can be reused to bore additional holes for other anchor.
    Type: Application
    Filed: April 23, 2010
    Publication date: October 27, 2011
    Inventors: Theodore F. Garfield, Gordon E. Kaye
  • Patent number: 7988389
    Abstract: The invention relates to a twist drill, with an elongated drill body displaying a connecting end, a middle part, and a working end with a center point, in addition to at least two main cutting edges that run roughly transversely to the longitudinal axis of the drill body and lie opposite one another in relation to the longitudinal axis, where main cutting edges are each provided with a radially outer tip, which projects in feed direction x of twist drill, a helical chip removal flute follows on from each main cutting edge, center point displays at least two pilot cutting edges, and pilot cutting edges start from the free end of center point, run roughly transversely to the longitudinal axis of drill body and lie opposite one another in relation to the longitudinal axis.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: August 2, 2011
    Assignee: Horst Miebach GmbH
    Inventor: Jurgen Miebach
  • Patent number: 7922429
    Abstract: The drill bit comprises a cutting blade formed at one end of a shank. The cutting blade has a pair of cutting shoulders that extend inwardly from the outer sides of the blade toward the bit axis. A tip having converging sides that create a point extends from the shoulders. The cutting edge of each shoulder is beveled with respect to the plane of the face of the blade. A flute is provided on the leading portion of each blade face adjacent the cutting edges. Each flute is a smooth curve that creates a substantially uninterrupted recess on each face of the blade that facilitates chip removal, increases the drill rate and lowers the power required to drill a hole. A non-stick coating may be applied to the blade to further facilitate chip removal.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: April 12, 2011
    Assignee: Irwin Industrial Tool Company
    Inventor: Laverne R. Durfee
  • Patent number: 7905690
    Abstract: The drill bit comprises a cutting blade formed at one end of a shank. The cutting blade has a pair of cutting shoulders that extend inwardly from the outer sides of the blade toward the bit axis. A tip having converging sides that create a point extends from the shoulders. The cutting edge of each shoulder is beveled with respect to the plane of the face of the blade. A flute is provided on the leading portion of each blade face adjacent the cutting edges. Each flute is a smooth curve that creates a substantially uninterrupted recess on each face of the blade that facilitates chip removal, increases the drill rate and lowers the power required to drill a hole. A non-stick coating may be applied to the blade to further facilitate chip removal.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: March 15, 2011
    Assignee: Irwin Industrial Tool Company
    Inventor: Laverne R. Durfee
  • Publication number: 20110038679
    Abstract: An adjustable step drill bit with a plurality of cutting disks held in compression on a shaft between two stops. The cutting disks may be arranged in various configurations. Spacers may also be provided on the shaft with the cutting disks. A method of drilling a hole utilizing the drill bit to drill a pilot hole and allowing for the drill bit to be used in a pulling technique.
    Type: Application
    Filed: August 11, 2009
    Publication date: February 17, 2011
    Inventor: Ira Kozak
  • Patent number: 7871224
    Abstract: A tool bit providing a combined drill bit and reamer is disclosed herein. The tool bit comprises an axial bit shaft including a bore end and a shank end. At least one helical land portion is provided on the bit shaft. The at least one helical land portion includes a cutting edge and a trailing edge. At least one reamer blade is provided on the helical land portion at the bore end of the bit shaft. The at least one reamer blade includes a substantially axial cutting edge. A tip arrangement is also included on the bore end of the bit shaft. The tip arrangement includes a center blade positioned between peripheral cutting blades.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: January 18, 2011
    Assignee: Robert Bosch GmbH
    Inventors: Hagen W. Dost, Patrick M. McAuliffe, Javier Ibarra, Alexander D. Socha
  • Patent number: 7832966
    Abstract: 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 opposing sides of the rotational axis of the drill. In an embodiment of the invention, first and second cutting edge portions form a continuous surface which provides strength and tool stability. The height of the second portions of each of the cutting edges remains relatively consistent along the horizontal for formation of a generally flat bottom hole. In the embodiment, a center point is defined by two sloped peak surfaces. A central straight chisel edge is formed by the intersection of the two sloped peak surfaces. The first cutting edge section extends from the chisel edge to the second cutting edge section. The first cutting edge section for both cutting edges is formed by symmetrically thinning the two peak surface.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: November 16, 2010
    Assignee: Kennametal Inc.
    Inventors: Michael D. Shultz, Stephen M. George, Raymond E. Moring, David L. Ford
  • Publication number: 20100278603
    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: Application
    Filed: July 13, 2010
    Publication date: November 4, 2010
    Applicant: TDY Industries, Inc.
    Inventors: X. Daniel Fang, Jean-Luc Dufour, David J. Wills
  • Patent number: 7819611
    Abstract: A rotary cutting tool is provided for cutting an opening in a sheet of material (e.g., drywall) around a pre-installed item (e.g., an electrical box). The cutting tool may include a shaft, at least one cutter, a guide tip and a shoulder formed by a lower edge of the cutter adjacent the guide tip. The shoulder may have a width that corresponds to the width of a wall of the pre-installed item. The width of the shoulder may be equal to the width of the wall, or it may be slightly greater than the width of the wall. The guide tip may include a bearing to prevent marring of the wall of the item when the guide tip is rotating and in contact with the wall. An adjustable collar and corresponding bearing may also be disposed around the shaft for controlling a preferred cutting depth of the cutter. The cutting tool may be engaged with any suitable rotary tool, including one having an adjustable table for controlling a preferred cutting depth of the cutter.
    Type: Grant
    Filed: November 8, 2006
    Date of Patent: October 26, 2010
    Inventor: Lonnie Cox
  • Patent number: 7794185
    Abstract: The drill bit comprises a cutting blade formed at one end of a shank. The cutting blade has a pair of cutting shoulders that extend inwardly from the outer sides of the blade toward the bit axis. A tip having converging sides that create a point extends from the shoulders. The cutting edge of each shoulder is beveled with respect to the plane of the face of the blade. A flute is provided on the leading portion of each blade face adjacent the cutting edges. Each flute is a smooth curve that creates a substantially uninterrupted recess on each face of the blade that facilitates chip removal, increases the drill rate and lowers the power required to drill a hole. A non-stick coating may be applied to the blade to further facilitate chip removal.
    Type: Grant
    Filed: June 17, 2008
    Date of Patent: September 14, 2010
    Assignee: Irwin Industrial Tool Company
    Inventor: Laverne R. Durfee
  • Publication number: 20100202845
    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: Application
    Filed: February 10, 2009
    Publication date: August 12, 2010
    Applicant: TDY Industries, Inc.
    Inventors: X. Daniel Fang, Jean-Luc Dufour, David J. Wills
  • Publication number: 20100196112
    Abstract: A drill bit for drilling holes in wood or the like has a spade cutting element, a thick elongate shaft and a shank adapted to be inserted into an SDS drill chuck. In a preferred embodiment, the shaft is provided with one or more ridges extending helically along most of its length, to strengthen and stiffen the shaft and to direct drilling debris away from the cutting element. The shaft has a diameter greater than or equal to that of the shank. The drill bit may be installed in and removed from the drill chuck more rapidly than conventional wood bits, is more robust and is more convenient and reliable in use.
    Type: Application
    Filed: September 26, 2008
    Publication date: August 5, 2010
    Inventor: Steve Burn
  • Publication number: 20100054883
    Abstract: An apparatus may comprise a body, a pilot, a blade, a shaft, and a guide. The body may have a first end and a second end. The pilot may extend from the first end of the body and the blade may be attached to the body and positioned longitudinally on the body at the first end. The shaft may extend from the second end of the body, and the guide may be capable of receiving the pilot.
    Type: Application
    Filed: August 28, 2008
    Publication date: March 4, 2010
    Inventors: Michael D. Katzenberger, Ralph D. Czeschin, Anthony P. Slade
  • Patent number: 7665936
    Abstract: The invention concerns a wood drill bit with a cylindrical drilling head. The drilling head has at its end a centering tip which is disposed on the longitudinal axis of the drill bit and which projects in the drilling direction for centering the wood drill bit, at least two main cutters which are arranged diametrically and radially or substantially radially and have main cutting edges, and a pan-cylindrical guide bell. Adjoining each main cutter is a chip ejection space which is partially open towards the connecting portion. It is proposed inter alia that the main cutter extends with a radially inwardly disposed portion into the centering tip and the chip ejection space is enlarged into the centering tip by means of a pre-chip ejection groove.
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: February 23, 2010
    Assignee: Horst Miebach GmbH
    Inventor: Jurgen Miebach
  • Patent number: 7572088
    Abstract: A deep hole boring head is provided which is capable of rotating about a central axis, a body whose front part has at least one cutting edge followed by a recess which leads to a duct inside the body, this duct allowing the chips formed during the boring to be cleared away rearwards, and includes at a front end thereof and at a center portion thereof a pilot drill bit capable of guiding the head during boring. Use for the boring of a production piece is made of titanium, the ratio L/D between the depth L of the hole bored and the diameter D of the latter being greater than or equal to 10, and the diameter D being greater than or equal to 65 mm.
    Type: Grant
    Filed: August 15, 2005
    Date of Patent: August 11, 2009
    Assignee: Messier-Dowty S.A.
    Inventor: Albert Biscay
  • Patent number: 7556459
    Abstract: A hole saw has an arbor and a cup shaped cutting member. The cup shaped cutting member has an annular skirt with a plurality of teeth at its free end. A drill bit is secured on the arbor. The drill bit includes a pilot point with a first cutting edge. A second edge is formed on the body portion of the drill bit to form a constant diameter hole in the workpiece.
    Type: Grant
    Filed: November 7, 2005
    Date of Patent: July 7, 2009
    Assignee: Black & Decker Inc.
    Inventor: Markus Rompel