Patents by Inventor Klaus Sieben

Klaus Sieben 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).

  • Process for producing polyurethane moldings
    Patent number: 7404916
    Abstract: Cellular or compact polyurethane moldings are produced by conveying at least one isocyanate component and at least one polyol component by a metering machine in dispensing manner into a mixing chamber via component lines to form a polyurethane reaction mixture. Subsequently, the polyurethane reaction mixture is discharged from the mixing chamber into a mold. The pressures of the components are registered by means of pressure transducers in the component lines and are transmitted to a monitoring device. The temporal profiles of the pressures are compared with reference pressure values stored in the monitoring device. A malfunction is signalled in the event of deviation of at least one of the measured pressure profiles from the reference pressure profile beyond a predetermined tolerance threshold.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: July 29, 2008
    Assignee: Hennecke GmbH
    Inventors: Michael Begemann, Klaus Sieben, Jürgen Wirth, Wolfgang Pawlik
  • Process for producing polyurethane moldings
    Publication number: 20040130049
    Abstract: Cellular or compact polyurethane moldings are produced by conveying at least one isocyanate component and at least one polyol component by a metering machine in dispensing manner into a mixing chamber via component lines to form a polyurethane reaction mixture. Subsequently, the polyurethane reaction mixture is discharged from the mixing chamber into a mold. The pressures of the components are registered by means of pressure transducers in the component lines and are transmitted to a monitoring device. The temporal profiles of the pressures are compared with reference pressure values stored in the monitoring device. A malfunction is signalled in the event of deviation of at least one of the measured pressure profiles from the reference pressure profile beyond a predetermined tolerance threshold.
    Type: Application
    Filed: December 9, 2003
    Publication date: July 8, 2004
    Inventors: Michael Begemann, Klaus Sieben, Jurgen Wirth, Wolfang Pawlik