Patents Assigned to Northern Border Pipeline Company
  • Method of applying a crack arrestor
    Patent number: 4327473
    Abstract: A method of applying a crack arrestor to a pipe section by heating and allowing the arrestor to cool and compress a layer of corrosion resistant material in the position it will occupy along the pipe length.
    Type: Grant
    Filed: January 19, 1979
    Date of Patent: May 4, 1982
    Assignee: Northern Border Pipeline Company
    Inventor: Francis S. Somerville
  • Crack arrestor
    Patent number: 4224966
    Abstract: This invention relates to crack arrestors for arresting longitudinal propagation of a crack in pipelines carrying natural gas or highly volatile normally gaseous liquids or combinations thereof, and to methods for applying said crack arrestor to pipelines.
    Type: Grant
    Filed: December 14, 1978
    Date of Patent: September 30, 1980
    Assignee: Northern Border Pipeline Company
    Inventor: Francis S. Somerville
  • Out of contact highly geometrical crack arrestor
    Patent number: 4180104
    Abstract: A system for arresting cracks in a pressurized natural gas fluid pipeline comprising a plurality of bands encircling the pipeline each having a highly geometrical rim cross section and being out of contact with the pipeline along an arc of the inner circumference of the encircling band.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: December 25, 1979
    Assignee: Northern Border Pipeline Company
    Inventors: Donald M. Park, Robert J. Eiber
  • Method of applying a bond-type crack arrestor to a pipe section of a pipeline
    Patent number: 4148127
    Abstract: A method of applying a band-type crack arrestor to a pipeline formed from a plurality of sections of pipe connected together end-to-end relation comprising placing the arrestor over the outer diameter of a pipe section and applying radial force to the inner diameter of the pipe section to engage the arrestor in a substantially stress free tight fit.
    Type: Grant
    Filed: October 19, 1976
    Date of Patent: April 10, 1979
    Assignee: Northern Border Pipeline Company
    Inventor: Francis S. Somerville