Patents by Inventor William H. Pettyjohn

William H. Pettyjohn 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).

  • Stud hole boring and tapping machine
    Patent number: 4609311
    Abstract: A device (10) is provided that is operative for purposes of accomplishing the drilling, boring and tapping of a relatively large size opening (106) in a body (17) while the latter is located in a hostile environment. The subject device (10) is characterized both in that it is portable and in that the boring and tapping functions are combined into the same device (10). The subject device (10) includes fixture means (18) for effecting the alignment of the device (10) relative to the opening (106) that is to be bored and tapped, support means (14) having a surface supported thereon in juxtaposed relation thereto, first operating means (16) supported on the aforesaid surface for movement relative thereto in a predetermined direction, and second operating means (104) cooperatively associated with the first operating means (16) for movement therewith and operative for purposes of performing certain machining operations.
    Type: Grant
    Filed: September 23, 1983
    Date of Patent: September 2, 1986
    Assignee: Combustion Engineering, Inc.
    Inventor: William H. Pettyjohn
  • Apparatus for grinding the internal walls of pipes
    Patent number: 4327526
    Abstract: A grinder is supported within a pipe, the support being arranged to adjust the movement of the head of the grinder radially and axially of the pipe axis to bear against internal cracks in the pipe wall.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: May 4, 1982
    Assignee: Combustion Engineering, Inc.
    Inventors: William H. Pettyjohn, John T. Lewis, William E. Milligan, deceased