Patents Assigned to Atlas Copco Constructing and Mining Technique AB
  • Tunnel boring machine
    Patent number: 5104261
    Abstract: Tunnel boring machine for reaming of a pilot tunnel (11). The machine housing (12) is provided with a projecting part in front of the boring head (13), said projecting part comprising a part (20) being fixed relative to the machine housing and a shield (19) being separable from the fixed part.This arrangement permits substantially uninterrupted excavation of the tunnel and prevents the excavated soil from becoming wedged between the boring head and the tunnel front.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: April 14, 1992
    Assignee: Atlas Copco Constructing and Mining Technique AB
    Inventors: Olov Anderson, Helmut Dick, Sverker Hartwig