Patents by Inventor David L. Koeller

David L. Koeller 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).

  • Water shield ring for plasma arc cutting torch
    Patent number: 4554431
    Abstract: A plasma arc cutting apparatus includes an adjustment member adjustably supporting a cutting torch. A rod is mounted to the adjustment member at one end and to a water shield ring at the other end for supporting the water shield in radially spaced apart relationship around a portion of the cutting torch.
    Type: Grant
    Filed: June 4, 1984
    Date of Patent: November 19, 1985
    Assignee: Deere & Company
    Inventor: David L. Koeller