Patents Assigned to Long-Airdox
  • Roof support for underground excavations
    Patent number: 5584611
    Abstract: The present invention is directed to a movable load support used for supporting the roof in underground excavations. The load support includes a primary roof support carried on a base frame and an auxiliary roof support also carried on said base frame but laterally disposed from the primary roof support. The auxiliary roof support is longitudinally and laterally moveable with respect to the primary roof support to successively provide roof support to adjacent areas of the roof.
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: December 17, 1996
    Assignee: Long-Airdox
    Inventor: David M. Clonch