Patents by Inventor Edwin Leslie Phillips, Jr.

Edwin Leslie Phillips, Jr. 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).

  • Archimedes spiral drill bit
    Patent number: 3951220
    Abstract: A drill bit for use in concentrically arranged dual drill strings. The bit has an outlet eccentrically arranged respective to its longitudinal axial centerline, and a formation engaging surface made of a plurality of spiraling faces which diminish in area as the cutting face curves about and toward the outlet. The area located between the spiraling faces form fluid conveying passageways through which a jet of fluid is directed toward the outlet, thereby carrying therewith cuttings formed by the spiral faces of the bit.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: April 20, 1976
    Assignee: Vance Industries, Inc.
    Inventors: Edwin Leslie Phillips, Jr., James David Carrigan