Patents by Inventor Rolf Seher

Rolf Seher 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).

  • Draw twisting machine
    Patent number: 4103210
    Abstract: A draw twisting machine is provided with a plurality of synchronous motors which drive respective draw rollers. The synchronous motors are supplied with electrical power from an A.C. generator having a variable frequency output. The A.C. generator is driven by a D.C. motor which is operatively arranged to run at variable angular velocity (rpm), the velocity being steplessly variable over a wide range. The D.C. motor may be driven at a crawl speed by an asynchronous electric motor via a transmission and overriding clutch.
    Type: Grant
    Filed: October 21, 1975
    Date of Patent: July 25, 1978
    Assignee: Zinser-Textilmaschinen GmbH
    Inventors: Horst Wolf, Rolf Seher