Patents Assigned to Fire Research Pty. Limited
  • Composite fire stop device
    Patent number: 4796401
    Abstract: A fire stop collar assembly comprises a plastics sleeve (2) which fits over a plastics pipe. An annular collar (4) of intumescent material is supported by the external surface of the sleeve (2). A tension spring (8) is held under tension on an end of the sleeve (2), with a sheath of refractory fabric (6) being interposed between the spring (8) and the sleeve (2). Upon softening of the pipe and sleeve (2) in the event of a fire, the spring (8) will act to constrict the sleeve and the pipe within the refractory sheath.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: January 10, 1989
    Assignee: Fire Research Pty., Limited
    Inventor: Jonathan B. Wexler
  • Devices for the fire stopping of plastics pipes
    Patent number: 4559745
    Abstract: A device for shutting-off a plastics pipe in the event of a fire comprises a sheath of a flexible refractory fabric around a portion of the pipe within or adjacent a fire-resisting partition such as a wall or floor. A spring is placed under tension around the fabric and acts to radially constrict the pipe and sheath, when the pipe softens in the event of a fire. Upon subsequent burning, the burnt plastics forms a foam-like carbon mass which plugs the constricted sheath.
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: December 24, 1985
    Assignee: Fire Research Pty. Limited
    Inventor: Jonathan B. Wexler