Patents by Inventor David V. Harrison

David V. Harrison 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: 4210098
    Abstract: Tanks for seagoing tankers for transporting liquefied natural gas or liquefied methone are basically prismatic, wherein the corners between intersecting walls are rounded off so that in such tanks adjacent flat wall parts are interconnected by a curved wall part. The invention relates to an apparatus and a method for mechanically treating the inner surfaces of the walls of such a tank, wherein the apparatus is so constructed that it is able to displace a treating tool along the flat wall parts and along the curved wall parts in such a manner that these wall parts are treated in a similar manner so that the quality of the treatment will be the same for all the various wall parts. The apparatus is particularly useful for spraying an insulating material, for example a polyurethane foam, onto the inner surface of the walls of such a tank.
    Type: Grant
    Filed: September 28, 1978
    Date of Patent: July 1, 1980
    Assignee: Shell Internationale Research Maatschappij B.V.
    Inventors: David V. Harrison, Roy Weaver, Henry G. E. Wilson
  • Patent number: 4048956
    Abstract: Apparatus for treating a surface comprising a first frame adapted to be moved across the surface to be treated, a sliding frame mounted on and adapted to slide relatively to the first frame in a direction perpendicular to the surface to be treated, an adjustable frame mounted on and adapted to be adjusted relatively to the sliding frame in a direction perpendicular to the surface to be treated, a tool carrier mounted on the adjustable frame and means for maintaining the sliding frame at substantially a predetermined distance from the surface to be treated.
    Type: Grant
    Filed: April 7, 1976
    Date of Patent: September 20, 1977
    Assignee: Shell Internationale Research Maatschappij B.V.
    Inventors: Joseph Estebanez, David V. Harrison, Clifford P. Jones, Henry G. E. Wilson