Patents by Inventor Daniel R. Sabre

Daniel R. Sabre 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).

  • Bearing design for drill bit
    Patent number: 4395076
    Abstract: A bearing construction for a rotary earth boring drill bit is constructed of a bearing journal and a cutter rotatively mounted on the bearing journal, the bearing journal having a generally cone-shaped bearing wall formed by a plurality of steps comprised of a pair of adjacent walls joined at an apex having an acute included angle, and the cutter having a bearing wall formed with a plurality of steps mating in bearing contact with the steps of the bearing journal.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: July 26, 1983
    Inventor: Daniel R. Sabre