Patents by Inventor Walter HULM

Walter HULM 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).

  • Drill head for a drill and drill
    Patent number: 9695640
    Abstract: A drill head is provided with three main cutting edges each having a straight direction of extension with a predominant radial direction component. The directions of extension limit two adjacent main bore dust discharge sectors, each spanning a main sector angle. Three drill head cutting legs each forming a main cutting edge where the three main cutting edges have different lengths along their directions of extension. Concentric ring shaped removal areas overlap at least partially such that a triple removal area coverage is provided in an outer ring zone and a double removal area coverage is provided in an inner ring zone.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: July 4, 2017
    Assignee: IRWIN INDUSTRIAL TOOL COMPANY
    Inventors: Rainer Eggers, Florian Probst, Walter Hulm, Manfred Geier
  • DRILL HEAD FOR A DRILL AND DRILL
    Publication number: 20140034395
    Abstract: A drill head is provided with three main cutting edges each having a straight direction of extension with a predominant radial direction component. The directions of extension limit two adjacent main bore dust discharge sectors, each spanning a main sector angle. Three drill head cutting legs each forming a main cutting edge where the three main cutting edges have different lengths along their directions of extension. Concentric ring shaped removal areas overlap at least partially such that a triple removal area coverage is provided in an outer ring zone and a double removal area coverage is provided in an inner ring zone.
    Type: Application
    Filed: August 1, 2013
    Publication date: February 6, 2014
    Inventors: Rainer EGGERS, Florian PROBST, Walter HULM, Manfred GEIER