Patents by Inventor Wolfgang Gehrmann

Wolfgang Gehrmann 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).

  • Integrated roller unit
    Patent number: 6441353
    Abstract: The invention relates to roller unit consisting of an inductively heated roller, a drive motor, an inductor and a frequency converter. According to the invention not only the converter but also the temperature regulator for the induction heater and monitoring devices for the roller, heater and/or motor are integrated into the roller unit. The power electronics and the regulator are mounted on a common cooling unit which is cooled by a coolant which at the same time also cools the motor, the bearings and the inductor.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: August 27, 2002
    Assignee: D.I.E.N.E.S. Apparatebau GmbH
    Inventors: Wolfgang Gehrmann, Max Brossmer
  • Method of monitoring a plurality of control loops by regulation ratio monitoring
    Patent number: 6023222
    Abstract: For monitoring the appropriate operation of a plurality of control loops having the same setpoint, the control ratio is measured at each controller, is normalized and an alarm signal is generated if said normalized control ratio exceeds a predetermined alarm band.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: February 8, 2000
    Assignees: D.I.E.N.E.S. Apparatebau GmbH, Zinser Textilmaschinen GmbH
    Inventors: Max Brossmer, Wolfgang Gehrmann, Erhard Lehle, Derrick Straka