Patents by Inventor David E. Wiltrout

David E. Wiltrout 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: 5983671
    Abstract: An apparatus and method for the preferably continuous manufacture of foamed material using a furnace are provided. A two-part mold mechanism is provided that includes an upper portion and a lower portion that are each endless loops and cooperate with one another to form a closed mold within the furnace. The upper and lower portions can each comprise a plurality of transverse mold members that can be easily replaced or exchanged during operation of the apparatus. A feed mechanism is provided for introducing material that is to be foamed to the mold mechanism upstream of the furnace. Scrapers or the like can be provided downstream of the furnace to aid in separating and supporting foamed material from the mold mechanism.
    Type: Grant
    Filed: February 7, 1997
    Date of Patent: November 16, 1999
    Assignee: Andrew Ungerleider
    Inventors: Steven C. Haines, Tai B. Bixby, Ronald D. Argent, Christopher J. Hoyle, David E. Wiltrout