Patents Assigned to Aktiebolaget Svenska Icopalfabriken
  • Ventilation devices, in particular smoke and heat ventilation devices
    Patent number: 3994096
    Abstract: Ventilation device with a vent pivotally mounted in a frame and restrained against opening forces by a locking mechanism and also connected to the frame by a hydraulic brake or damper designed to gradually reduce the opening speed of the vent at least towards the end of the opening movement.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: November 30, 1976
    Assignee: Aktiebolaget Svenska Icopalfabriken
    Inventors: Kjell Ake Bertil Holmgren, Per-Arne Lindholm