Patents by Inventor William Walter STROHFELDT

William Walter STROHFELDT 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).

  • Publication number: 20200399836
    Abstract: The present disclosure includes a portable rail safety system configured to determine a position of a rail switch. The rail safety system may include a rail switch detector, one or more rail switch beacons, a work block marker, a personal alert device, a collision avoidance system or combination thereof. In some aspects rail switch detector includes a first detector configured to be positioned between switch rails of a rail track and having a body, a first sensor coupled to the body and configured to detect a first switch rail tip of the switch rails, and a controller configured to calculate a first distance between the first sensor and the first switch rail tip and based on the first distance, determine a position of the switch rails between a first position and a second position.
    Type: Application
    Filed: June 19, 2020
    Publication date: December 24, 2020
    Inventors: Daniel ZAMPINI, John Wesley WIGGINS, William Walter STROHFELDT, David GEERING, Douglas L. ICE