Patents by Inventor Donald E. Lloyd

Donald E. Lloyd 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).

  • Drill bit
    Patent number: 4117897
    Abstract: A drill bit comprising a body suspended in a well bore by an electrical cable which transmits power to a motor secured to the body and eccentric cam member rotated by the drive shaft of the motor and engagable with a plurality of reciprocal drill pins whereby the pins are sequentially impinged against the sidewalls and bottom of the well bore for producing a drilling operation.
    Type: Grant
    Filed: June 13, 1977
    Date of Patent: October 3, 1978
    Inventor: Donald E. Lloyd