Patents Assigned to Manibs. R. Mannesmann GmbH. & ibs Nagel GmbH. & Co. KG
  • Pipeline for gaseous fluids and method of assembling its components
    Patent number: 4693499
    Abstract: A pipeline wherein one end portion of a first metallic pipe fits with annular clearance into the adjacent end portion of a second metallic pipe and the adjacent end portion has an internal groove for a radially and axially deformable ring which is biased radially inwardly and axially by a supply of gaseous, liquid or paste-like medium in the radially outermost part of the groove so that the free end of the adjacent end portion can be welded to the one end portion while the pipes convey a compressed gaseous fluid.
    Type: Grant
    Filed: December 5, 1985
    Date of Patent: September 15, 1987
    Assignee: Manibs. R. Mannesmann GmbH. & ibs Nagel GmbH. & Co. KG
    Inventor: Klaus Serve