Patents by Inventor Dietmar Liebau

Dietmar Liebau 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).

  • Thread rolling tap
    Patent number: 6514148
    Abstract: A thread rolling tap including a stem portion, and a thread forming portion having a body with a plurality of thread turns formed on the body and including a front entrance region and a guide region, with the thread turns having each, in the front region in vicinity of the body, inclined pressure flanks forming side surfaces of an acute angle and connected by an outer, arranged radially outwardly with respect to the body, pressure surface formed as a flattening having opposite rounded edges extending along a circumference of a respective thread turn.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: February 4, 2003
    Assignee: EMUGE-Werk Richard Glimpel Fabrik für Präzisionswerkzeuge vormals Moschkau & Glimpel
    Inventors: Helmut Glimpel, Dietmar Maier, Dietmar Liebau, Rainer Fritsch
  • Thread rolling tap
    Publication number: 20010014625
    Abstract: A thread rolling tap including a stem portion, and a thread forming portion having a body with a plurality of thread turns formed on the body and including a front entrance region and a guide region, with the thread turns having each, in the front region in vicinity of the body, inclined pressure flanks forming side surfaces of an acute angle and connected by an outer, arranged radially outwardly with respect to the body, pressure surface formed as a flattening having opposite rounded edges extending along a circumference of a respective thread turn.
    Type: Application
    Filed: December 5, 2000
    Publication date: August 16, 2001
    Inventors: Helmut Glimpel, Dietmar Maier, Dietmar Liebau, Rainer Fritsch