Patents by Inventor David C. Maddock

David C. Maddock 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: 5864970
    Abstract: An earth excavating apparatus is disclosed as operable to loosen earthen material and expel the loosened earthen material away from the apparatus. One embodiment of the apparatus includes a rotatable drum partially disposed within a housing and having a plurality teeth thereon adapted to loosen earth and direct the loosened earth into the housing as the drum rotates. A discharge fan is further disposed within the housing and is operable to expel the loosened earthen material from within the housing away from the apparatus. The apparatus may be towed by a vehicle and the rotatable drum is adjustable between a vertical transport position and an excavating position of approximately 45 degrees below horizontal. An alternate embodiment of the apparatus includes the drum/fan arrangement of the first embodiment adjustably mounted to a boom arrangement. The drum/fan arrangement may be adjustably positioned on the boom between a transport position and a variety of excavating positions.
    Type: Grant
    Filed: January 22, 1996
    Date of Patent: February 2, 1999
    Inventors: David C. Maddock, William E. Maddock