Patents by Inventor Frans L. Halfhide

Frans L. Halfhide 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).

  • Particulate fuel burner and method of operation
    Patent number: 5010831
    Abstract: Burner having two coaxially mounted tubes (3,4). The outer tube (3) is provided with means to introduce both air and particulate matter in the space between both tubes. For conveying of solid matter between both tubes screw conveyor means (5) are provided. Transferring of gasses resulting from gasification of the solid material to the inner space of the inner tube 4 is provided by opening (15).
    Type: Grant
    Filed: October 18, 1989
    Date of Patent: April 30, 1991
    Inventor: Frans L. Halfhide