Patents by Inventor Hubert Ludwig

Hubert Ludwig 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).

  • Battery for a handheld machine tool and method for producing a battery for a handheld machine tool
    Patent number: 10833300
    Abstract: The battery unit according to the invention for a handheld machine tool comprises a number of battery cells, with at least one of the battery cells being embodied as an isolation battery cell, and showing a fire protection jacket comprising an intumescent material. The fire protection jacket surrounds the isolation battery cell at least partially such that the isolation battery cell is surrounded by the fire protection jacket at a predetermined temperature such that the isolation battery cell is thermally insulated.
    Type: Grant
    Filed: July 16, 2015
    Date of Patent: November 10, 2020
    Assignee: HILTI AKTIENGESELLSCHAFT
    Inventors: Benno Verhaag, Bernd Ziegler, Hubert Ludwig, Michael Brandner, Klaus Hauser
  • BATTERY FOR A HANDHELD MACHINE TOOL AND METHOD FOR PRODUCING A BATTERY FOR A HANDHELD MACHINE TOOL
    Publication number: 20150325826
    Abstract: The battery unit according to the invention for a handheld machine tool comprises a number of battery cells, with at least one of the battery cells being embodied as an isolation battery cell, and showing a fire protection jacket comprising an intumescent material. The fire protection jacket surrounds the isolation battery cell at least partially such that the isolation battery cell is surrounded by the fire protection jacket at a predetermined temperature such that the isolation battery cell is thermally insulated.
    Type: Application
    Filed: July 16, 2015
    Publication date: November 12, 2015
    Inventors: Benno Verhaag, Bernd Ziegler, Hubert Ludwig, Michael Brandner, Klaus Hauser
  • Carriage with advantageous flow characteristics for vehicles
    Patent number: 4505507
    Abstract: A carriage with advantageous flow characteristics for vehicles, especially utomobiles, with a passenger compartment that has a more or less rectangular cross-section (13) and at least one sloping windshield (11). To reduce flow resistance the width of the body in front of and/or in back of the passenger compartment (13) varies in relation to its change in height in such a way that only a small flow around edge (flow across the upper longitudinal edge) occurs without any flow separation at all or with only insignificant separation.
    Type: Grant
    Filed: March 31, 1983
    Date of Patent: March 19, 1985
    Assignee: Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.
    Inventor: Hubert Ludwig