Patents Assigned to Acousta-Fil Limited
  • Sound muffling material and method of making thereof
    Patent number: 6457555
    Abstract: A sound muffling material for use in combustion engine exhaust mufflers is provided. The material includes volumized fibers retained in compressed form by a material of lower softening temperature than the fibers. When the material is heated by exhaust gases, the material of lower softening temperature is softened allowing the compressed fibers to expand. The fibers may be formed into a knitted fabric retained by a sacrificial thread. The material may be used to support catalyst bricks.
    Type: Grant
    Filed: July 10, 2000
    Date of Patent: October 1, 2002
    Assignee: Acousta-Fil Limited
    Inventor: Stephen James Saughnessy
  • Sound muffling material and method of making thereof
    Patent number: RE42634
    Abstract: A sound muffling material for use in combustion engine exhaust mufflers is provided. The material includes volumized fibers retained in compressed form by a material of lower softening temperature than the fibers. When the material is heated by exhaust gases, the material of lower softening temperature is softened allowing the compressed fibers to expand. The fibers may be formed into a knitted fabric retained by a sacrificial thread. The material may be used to support catalyst bricks.
    Type: Grant
    Filed: November 4, 1998
    Date of Patent: August 23, 2011
    Assignee: Acousta-Fil Limited
    Inventor: Stephen James Shaughnessy