Patents by Inventor Dietrich E. Hermann

Dietrich E. Hermann 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).

  • Escalator handrail drive
    Patent number: 4875568
    Abstract: An escalator handrail is driven by a pair of angularly offset rollers. The angular offset of the rollers causes a wedging effect at the roller nip whereby the driving force imparted by the rollers to the handrail is increased.
    Type: Grant
    Filed: January 5, 1989
    Date of Patent: October 24, 1989
    Assignee: Otis Elevator Company
    Inventors: Dietrich E. Hermann, Ralf Holzhauer