Patents by Inventor Ralf Jessenberger

Ralf Jessenberger 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).

  • Patent number: 6189657
    Abstract: A linear motor for lifts for driving a lift car guided in a lift shaft with at least one stator winding row which can be fixed to the lift shaft or to the lift car and with at least one row of exciter magnets of alternating polarity which are situated opposite the stator windings at a distance and which can be fixed to the lift car or the lift shaft, respectively, in such a way that the linear motor exerts only small transverse forces on the motor support and also operates as noiselessly as possible and is easy to assemble, wherein that the stator windings are of iron-free design and are disposed between two mutually oppositely situated exciter magnet rows. In addition, a lift having a lift car which can be driven in a lift shaft wherein the lift has a linear motor of this type for driving the lift car.
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: February 20, 2001
    Assignee: Thyssen Aufzugswerke GmbH
    Inventor: Ralf Jessenberger