Patents by Inventor Thorsten Assel

Thorsten Assel 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).

  • Hard material bit
    Patent number: 7549491
    Abstract: A hard material bit for a rotary-percussion tool (2) includes at least one cutting edge (3), a bottom surface (6) located opposite the at least one cutting edge (3), and at least one attachment surface (8) and at least one free surface (10) both extending transverse to the bottom surface (6) and forming, respectively, a piecewise extending first chamfer (9a) and second chamfer (9b), with the second chamfer (9b) having a width greater than a width of the first chamfer (9a).
    Type: Grant
    Filed: April 25, 2007
    Date of Patent: June 23, 2009
    Assignee: Hilti Aktiengesellschaft
    Inventors: Klaus Hoeggerl, Olaf Koch, Thorsten Assel
  • Drill with a hard material drilling head
    Publication number: 20080118317
    Abstract: A one-piece drilling head (4), which is securable, in a material-locking manner, on an axial end of a helical shaft of a drill, is formed of a hard material and has four radially extending, in a cross-shaped manner, legs (5) forming respective cutting edges (6), and a tangential reinforcement (7) provided at a radially outer rim of each leg (5) in an axial region of a cutting edge (6).
    Type: Application
    Filed: November 16, 2007
    Publication date: May 22, 2008
    Inventor: Thorsten Assel
  • Hard material bit
    Publication number: 20070251733
    Abstract: A hard material bit for a rotary-percussion tool (2) includes at least one cutting edge (3), a bottom surface (6) located opposite the at least one cutting edge (3), and at least one attachment surface (8) and at least one free surface (10) both extending transverse to the bottom surface (6) and forming, respectively, a piecewise extending first chamfer (9a) and second chamfer (9b), with the second chamfer (9b) having a width greater than a width of the first chamfer (9a).
    Type: Application
    Filed: April 25, 2007
    Publication date: November 1, 2007
    Inventors: Klaus Hoeggerl, Olaf Koch, Thorsten Assel
  • Rock drill
    Patent number: 7021872
    Abstract: A rock drill (1) for cutting rock comprising an elongated, helical shaft (2), which has, at one end, an insertion part (3) and, at the end opposite, a tool head (4) with cutters (5) made of hard material, wherein the helical shaft (2) is at least partially coated with a colored layer (7a, 7b) and the layer forms a lengthwise running wear indicator marking (8) inside the helical groove (8).
    Type: Grant
    Filed: November 18, 2002
    Date of Patent: April 4, 2006
    Assignee: Hilti Aktiengesellschaft
    Inventors: Udo Hauptmann, Tim Pröls, Thorsten Assel
  • Rock drill
    Publication number: 20030103823
    Abstract: A rock drill (1) for cutting rock comprising an elongated, helical shaft (2), which has, at one end, an insertion part (3) and, at the end opposite, a tool head (4) with cutters (5) made of hard material, wherein the helical shaft (2) is at least partially coated with a colored layer (7a, 7b) and the layer forms a lengthwise running wear indicator marking (8) inside the helical groove (8).
    Type: Application
    Filed: November 18, 2002
    Publication date: June 5, 2003
    Inventors: Udo Hauptmann, Tim Prols, Thorsten Assel