Patents by Inventor Rolf Knodel

Rolf Knodel 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).

  • Concrete mold with arrangement for mounting tubular components
    Patent number: 4948089
    Abstract: For the production of cross ties for switches, made of concrete in a prestressing fixture, a recoverable device for the emplacement of tubular components is built into the bottom of the concrete form for the tie, which comprises a pin and a nipple inserted detachably into its bottom. The nipple can be inserted into a corresponding bore of a base plate. The bore determines the position of a tube in the cross tie, has an upper and a lower stop with which it is anchored in the pin or the base plate, respectively, and can be firmly tensioned upon the base plate.
    Type: Grant
    Filed: April 27, 1988
    Date of Patent: August 14, 1990
    Assignee: Wayss & Freytag Aktiengesellschaft
    Inventors: Rolf Knodel, Frithjof Schimpff, Wolfgang Bergenthal, Thomas Zander