Patents by Inventor Andreas Spielmann

Andreas Spielmann 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 and apparatus for dissipating elastically stored energy
    Patent number: 10411639
    Abstract: Method for dissipating the elastically stored energy of a tool operated with an electric motor (20), comprising determining the rotational speed of the electric motor; determining a limit torque for the electric motor (20) using the rotational speed, at which limit torque the energy is converted at least predominantly into copper losses of the electric motor; and driving the electric motor (20) by means of a rotational speed regulation with a decreasing rotational speed, while complying with the limit torque as motor torque upper limit.
    Type: Grant
    Filed: September 25, 2017
    Date of Patent: September 10, 2019
    Assignee: WITTENSTEIN SE
    Inventors: Matthias Essig, Andreas Spielmann
  • METHOD AND APPARATUS FOR DISSIPATING ELASTICALLY STORED ENERGY
    Publication number: 20180091084
    Abstract: Method for dissipating the elastically stored energy of a tool operated with an electric motor (20), comprising determining the rotational speed of the electric motor; determining a limit torque for the electric motor (20) using the rotational speed, at which limit torque the energy is converted at least predominantly into copper losses of the electric motor; and driving the electric motor (20) by means of a rotational speed regulation with a decreasing rotational speed, whilst complying with the limit torque as motor torque upper limit.
    Type: Application
    Filed: September 25, 2017
    Publication date: March 29, 2018
    Inventors: Matthias Essig, Andreas Spielmann
  • Electric motor having a braking element
    Patent number: 8618704
    Abstract: An electric motor is disclosed and which includes a braking element which is biasingly urged into a braking relationship relative to the electric motor, when the electric motor is deenergized, but which is further moved out of braking engagement when the electric motor is energized. The invention finds particular usefulness when used on hand tools, such as angle grinders.
    Type: Grant
    Filed: March 17, 2010
    Date of Patent: December 31, 2013
    Assignee: Metabowerke GmbH
    Inventors: Matthias Hiller, Andreas Spielmann
  • ELECTRIC MOTOR
    Publication number: 20120013203
    Abstract: An electric motor is disclosed and which includes a braking element which is biasingly urged into a braking relationship relative to the electric motor, when the electric motor is deenergized, but which is further moved out of braking engagement when the electric motor is energized. The invention finds particular usefulness when used on hand tools, such as angle grinders.
    Type: Application
    Filed: March 17, 2010
    Publication date: January 19, 2012
    Inventors: Matthias Hiller, Andreas Spielmann