Patents Assigned to Gestion des brevets Fraco limitee
  • Self-raising work platform assembly
    Patent number: 5159993
    Abstract: The self-raising work platform assembly includes a pair of spaced towers adapted to be erected alongside a building structure, sleeve members surrounding and guided along the respective towers, joists extending between and releasably hooked to the sleeves, a flooring supported by the joists and chain blocks carried by the sleeves. The chains can be hooked to the tower to raise the sleeves, the joists and the flooring, to the level at which work on the building is to be effected.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: November 3, 1992
    Assignee: Gestion des brevets Fraco limitee
    Inventor: Andre St-Germain