TREA

having longitudinal cavities communicating with the exterior on the outer side of the lining elements

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Industry

  • CPC
  • E21D11/388
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D11/00Lining tunnels, galleries or other underground cavities

Current Industry

E21D11/388having longitudinal cavities communicating with the exterior on the outer side of the lining elements
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Relating to seals
    • Patent number 5,044,823
    • Issue date Sep 3, 1991
    • C.E. Heinke & Company Limited
    • George H. Burgess
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Profiled gasket for sealing tunnel segment joints
    • Patent number 4,199,158
    • Issue date Apr 22, 1980
    • Vredestein N.V.
    • Eduard H. L. de Munck
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING

Patents Applicationslast 30 patents