Patents by Inventor Ross B. Farris

Ross B. Farris 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).

  • Hammer stabilizer
    Patent number: 3999618
    Abstract: A sub is screwed to the top of a down hole percussor. A replaceable stabilizer sleeve is screwed to the sub and extends down around the percussor body spaced radially therefrom. A rubber shock ring inside the lower end of the sleeve centralizes the sleeve relative to the percussor body.
    Type: Grant
    Filed: January 22, 1975
    Date of Patent: December 28, 1976
    Assignee: Smith International, Inc.
    Inventor: Ross B. Farris