Patents by Inventor Marcel WONDRA

Marcel WONDRA 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).

  • Hand-held power tool
    Patent number: 11364611
    Abstract: A chiseling hand-held power tool having a tool holder for holding a tool on a working axis, an electric motor, and a striking mechanism. The striking mechanism has an excitation piston coupled to the motor, a striker guided on the working axis and a pneumatic chamber closed by the excitation piston and the striker for coupling a movement of the striker to the excitation piston. The rotational speed of the electric motor corresponds to at least 20 times the striking rate of the striking mechanism.
    Type: Grant
    Filed: December 20, 2019
    Date of Patent: June 21, 2022
    Assignee: Hilti Aktiengesellschaft
    Inventors: Christian Schallert, Jürgen Pritz, Marcel Wondra, Carl Hoffmann, Walter Vallaster
  • HAND-HELD POWER TOOL
    Publication number: 20210402583
    Abstract: A chiselling hand-held power tool having a tool holder for holding a tool on a working axis, an electric motor, and a striking mechanism. The striking mechanism has an excitation piston coupled to the motor, a striker guided on the working axis and a pneumatic chamber closed by the excitation piston and the striker for coupling a movement of the striker to the excitation piston. The rotational speed of the electric motor corresponds to at least 20 times the striking rate of the striking mechanism.
    Type: Application
    Filed: December 20, 2019
    Publication date: December 30, 2021
    Inventors: Christian SCHALLERT, Jürgen PRITZ, Marcel WONDRA, Carl HOFFMANN, Walter VALLASTER