Patents by Inventor Bernhard Weisshaar

Bernhard Weisshaar 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 device for monitoring chatter in twin drives of roll stands
    Patent number: 5515731
    Abstract: In chatter monitoring of twin drives of roll stands, vibrations of an upper drive and a lower drive are detected and monitored to determine whether a predetermined amplitude has been exceeded. If the amplitude has been exceeded, a chatter detection signal is generated. In order to prevent the chatter detection signal from being generated erroneously due to an operational pass vibrations, the frequencies of the vibrations of the upper drive and the lower drive are monitored for identity; when the frequencies are identical, the chatter detection signal is suppressed.
    Type: Grant
    Filed: July 8, 1994
    Date of Patent: May 14, 1996
    Assignee: Siemens Aktiengesellschaft
    Inventors: Bernhard Weisshaar, Werner Schnalzger, Johann Wokusch