Patents Assigned to Giertsen Tunnel AS
  • Device and a method for drainage of water from rock caves
    Patent number: 7513712
    Abstract: A device of a water draining system for caverns is described, comprising one or more sections of tunnel covering or tunnel canvas which is arranged in the cavern at a certain distance from the walls and ceiling of the cavern, and a draining pipe system for leading away water.
    Type: Grant
    Filed: October 15, 2004
    Date of Patent: April 7, 2009
    Assignee: Giertsen Tunnel AS
    Inventor: Alv Hanstvedt
  • Device and a method for drainage of water from rock caves
    Publication number: 20050097845
    Abstract: A device of a water draining system for caverns is described, comprising one or more sections of tunnel covering or tunnel canvas which is arranged in the cavern at a certain distance from the walls and ceiling of the cavern, and a draining pipe system for leading away water.
    Type: Application
    Filed: October 15, 2004
    Publication date: May 12, 2005
    Applicant: Giertsen Tunnel AS
    Inventor: Alv Hanstvedt