Patents by Inventor George F. Johnson

George F. Johnson 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).

  • Patent number: 5370218
    Abstract: A coal haulage apparatus is provided for use in moving coal fragments within the horizontal shafts of a coal mine on a belt conveyor that runs longitudinally along the apparatus. The apparatus is an assembly of multiple, like sections that each have a pair of longitudinal rails and cross members which join the rails together in a parallel, spaced-apart relationship, of which the rails are designed to receive the bottom portion of V-grooved wheels of a dolly that can move longitudinally along the top of each section of the coal haulage apparatus. The longitudinal rails essentially act as the frame that supports the vertical weight of the dolly which rolls along the top of each section of the coal haulage apparatus, and a separate vertical support frame is not required. The rails are made of square tubing that uses a smaller mating, connecting tube to join rails from one section to another adjacent section.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: December 6, 1994
    Assignee: Johnson Industries, Inc.
    Inventors: George F. Johnson, Jr., Arnemann R. Grender
  • Patent number: 4446626
    Abstract: A laser transmitter is suspended from spads set in the ceiling of the mining tunnel to establish a visible light beam aligned with the desired directional heading of the tunnel. In a first embodiment, the laser transmitter is attached to a bar suspended by means of cables from the spads. In a second embodiment, the laser transmitter assembly is suspended by means of adjustable ball chains, and includes a slide plate for moving the housing in directions transverse to the light beam. The method and apparatus is usable with existing tunnel operations having spads already in place.
    Type: Grant
    Filed: April 12, 1982
    Date of Patent: May 8, 1984
    Inventors: Arnemann Grender, George F. Johnson, Jr.
  • Patent number: D271163
    Type: Grant
    Filed: August 6, 1981
    Date of Patent: November 1, 1983
    Inventor: George F. Johnson