Patents by Inventor Brad D. Hoffer

Brad D. Hoffer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Cutting tool including a locking screw and adapter with coolant delivery
    Patent number: 8573098
    Abstract: A cutting tool has a cutter body, which carries a cutting insert, and an adapter, which has a longitudinal adapter axis, wherein a locking screw attaches the cutter body to the adapter. A coolant volume is defined in a vicinity of a meeting of the cutter body, the adapter and the locking screw. The adapter contains an axial adapter bore. The locking screw contains a transverse locking screw bore in fluid communication with the axial adapter bore. The locking screw further contains a peripheral transverse locking screw bore passage in fluid communication with the coolant volume and the transverse locking screw bore. The coolant volume and the transverse locking screw bore are in fluid communication with the cutter body coolant passage.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: November 5, 2013
    Assignee: Kennametal Inc.
    Inventors: Brad D Hoffer, Ruy Frota De Souza Filho, Thomas J Long, II, Kevin M Gamble, James M Waggle
  • Shim for a cutting insert and cutting insert-shim assembly with internal coolant delivery
    Patent number: 8439608
    Abstract: A cutting insert-shim assembly that has a cutting insert with a bottom surface and a plurality of interior coolant passages wherein each interior coolant passage has a coolant inlet in the bottom surface of the cutting insert. The shim has a first side surface and a second side surface and contains a cavity, which communicates with the coolant conduit. The cavity defines a first opening in the first side surface and a second opening in the second side surface. When the shim is in a first condition, the first side surface contacts the bottom surface of the cutting insert and the first opening provides a first level of coolant communication to the interior coolant passages in the cutting insert. When the shim is in a second condition, the second side surface contacts the bottom surface of the cutting insert and the second opening provides a second level of coolant communication to the interior coolant passages in the cutting insert.
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: May 14, 2013
    Assignee: Kennametal Inc.
    Inventors: Shi Chen, Nicholas Joseph Henry, Charles Lisle Conway, Kent Peter Mizgalski, Joseph V. Nelson, Linn R. Andras, Thomas O. Muller, Paul D. Prichard, Brad D. Hoffer
  • CUTTING TOOL INCLUDING A LOCKING SCREW AND ADAPTER WITH COOLANT DELIVERY
    Publication number: 20120230781
    Abstract: A cutting tool has a cutter body, which carries a cutting insert, and an adapter, which has a longitudinal adapter axis, wherein a locking screw attaches the cutter body to the adapter. A coolant volume is defined in a vicinity of a meeting of the cutter body, the adapter and the locking screw. The adapter contains an axial adapter bore. The locking screw contains a transverse locking screw bore in fluid communication with the axial adapter bore. The locking screw further contains a peripheral transverse locking screw bore passage in fluid communication with the coolant volume and the transverse locking screw bore. The coolant volume and the transverse locking screw bore are in fluid communication with the cutter body coolant passage.
    Type: Application
    Filed: March 7, 2011
    Publication date: September 13, 2012
    Applicant: Kennametal Inc.
    Inventors: Brad D. Hoffer, Ruy Frota De Souza Filho, Thomas J. Long, II, Kevin M. Gamble, James M. Waggle
  • SHIM FOR A CUTTING INSERT AND CUTTING INSERT-SHIM ASSEMBLY WITH INTERNAL COOLANT DELIVERY
    Publication number: 20110020072
    Abstract: A cutting insert-shim assembly that has a cutting insert with a bottom surface and a plurality of interior coolant passages wherein each interior coolant passage has a coolant inlet in the bottom surface of the cutting insert. The shim has a first side surface and a second side surface and contains a cavity, which communicates with the coolant conduit. The cavity defines a first opening in the first side surface and a second opening in the second side surface. When the shim is in a first condition, the first side surface contacts the bottom surface of the cutting insert and the first opening provides a first level of coolant communication to the interior coolant passages in the cutting insert. When the shim is in a second condition, the second side surface contacts the bottom surface of the cutting insert and the second opening provides a second level of coolant communication to the interior coolant passages in the cutting insert.
    Type: Application
    Filed: September 1, 2010
    Publication date: January 27, 2011
    Applicant: Kennametal Inc.
    Inventors: Shi Chen, Nicholas Joseph Henry, Charles Lisle Conway, Kent Peter Mizgalski, Joseph V. Nelson, Linn R. Andras, Thomas O. Muller, Paul D. Prichard, Brad D. Hoffer