Patents by Inventor Jens Ullrich

Jens Ullrich 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).

  • Ram speed control method and apparatus
    Patent number: 6193625
    Abstract: The present invention relates to a method of controlling a ram speed of a press ram of a metal-forming press, and a driving device, in particular for carrying out this method. According to the present invention, at least one energy storage device is connected to an auxiliary drive having connected thereto the main drive for controlling the ram speed, said energy storage device having supplied thereto the energy released during a negative acceleration of the press ram while from said energy storage device additional energy for the acceleration of the press ram during a further stroke is recovered and fed into the main drive via the auxiliary drive.
    Type: Grant
    Filed: March 22, 1999
    Date of Patent: February 27, 2001
    Assignee: Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
    Inventors: Jens Ullrich, Karlheinz Morgenstern