Patents by Inventor LOTHAR GALEHR

LOTHAR GALEHR 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).

  • Method for tightening bolt connection by elongation of bolt
    Patent number: 8875803
    Abstract: The present invention relates to a method for tightening a bolt connection through elongation of the bolt where strokes of a power element, especially a hydraulic cylinder, are converted into a rotational movement of a tightening tool. The method according to an embodiment of the present invention is carried out in at least two steps. As a first step, the bolt is first tightened to a predetermined snug torque. As a second step, the bolt is then tightened up through a predetermined number of complete strokes of the power element of the power wrench. In this way, a torque method is combined with a rotational angle method that is controlled by the number of strokes.
    Type: Grant
    Filed: January 10, 2011
    Date of Patent: November 4, 2014
    Assignee: Liebherr-Werk Nenzing Ges.m.b.H
    Inventors: Lothar Galehr, Manuel Zint, Juergen Wachter
  • METHOD FOR TIGHTENING BOLT CONNECTION BY ELONGATION OF BOLT
    Publication number: 20110168418
    Abstract: The present invention relates to a method for tightening a bolt connection through elongation of the bolt where strokes of a power element, especially a hydraulic cylinder, are converted into a rotational movement of a tightening tool. The method according to an embodiment of the present invention is carried out in at least two steps. As a first step, the bolt is first tightened to a predetermined snug torque. As a second step, the bolt is then tightened up through a predetermined number of complete strokes of the power element of the power wrench. In this way, a torque method is combined with a rotational angle method that is controlled by the number of strokes.
    Type: Application
    Filed: January 10, 2011
    Publication date: July 14, 2011
    Applicant: Liebherr-Werk Nenzing Ges.m.b.H.
    Inventors: LOTHAR GALEHR, MANUEL ZINT, JUERGEN WACHTER