Patents Assigned to Siargas -- Societa' Italiana Assistenza Reti Gas S.p.A.
  • Apparatuses for producing tight joints or seals in underground pipelines
    Patent number: 4178875
    Abstract: A method of rejoining seals at joints in underground pipelines comprises moving a carriage inside a pipeline beyond a joint to be reformed and rapidly spraying a synthetic polymerizable material to cover the joint from a spraying head mounted on the carriage and displaced relatively slowly with respect thereto. The carriage has means for propelling it on rolling members, for anchoring it in the pipeline, and for moving an arm on which the spraying head is mounted.
    Type: Grant
    Filed: November 30, 1977
    Date of Patent: December 18, 1979
    Assignee: Siargas -- Societa' Italiana Assistenza Reti Gas S.p.A.
    Inventor: Armando Moschetti