Patents by Inventor Robert E. Gilbert

Robert E. Gilbert 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: 4308923
    Abstract: Disclosed herein is a device for orienting a drilling auger disposed on and powered by a vehicle defined by a lower frame member carried by the vehicle, an upper frame member pivoted to the lower frame member for rotation about an axis, and an auger supporting framework pivoted to the upper framework for rotation about a second axis orthogonal to the first axis in which the rotation is controlled by hydraulic cylinders extending between the lower and upper frame members, and between the upper frame member and the auger supporting framework, respectively. The auger itself is driven by a power take-off on the vehicle in a preferred form which in conjunction with the preceeding structure allows the auger to address the earth in which the hole is to be drilled in substantially any angle above the surface of the earth.
    Type: Grant
    Filed: December 11, 1979
    Date of Patent: January 5, 1982
    Inventor: Robert E. Gilbert
  • Patent number: 4074780
    Abstract: An earth auger having an integral or one piece cutting blade and pilot element so arranged that the pilot element is spaced downwardly from the shaft of the auger; the cutting blade also having a curved edge swept back from the axis of the auger to provide a slicing action as well as "threading" action to facilitate penetration of the auger into the ground.
    Type: Grant
    Filed: July 28, 1976
    Date of Patent: February 21, 1978
    Inventor: Robert E. Gilbert