Patents Assigned to Reduc Acoustics AB
  • Vibration damped structures and objects
    Patent number: 4338758
    Abstract: Vibration energy is absorbed in a structure in which bores are formed in a rigid part and viscoelastic material is applied in the bores.
    Type: Grant
    Filed: April 25, 1980
    Date of Patent: July 13, 1982
    Assignee: Reduc Acoustics AB
    Inventor: Gunnar Hagbjer
  • Sandwich structures with partial damping layers
    Patent number: 4195713
    Abstract: According to the invention the damping of vibration on the part of a structural material such as metal or concrete is effected by applying a limited amount of vibration-damping viscoelastic material between the two such structural parts, the vibration-damping material being being applied in lines, points or the like spaced from each other at distances less than one bending wavelength for the highest frequency range to be damped.
    Type: Grant
    Filed: September 18, 1978
    Date of Patent: April 1, 1980
    Assignee: Reduc Acoustics AB
    Inventors: Gunnar I. Hagbjer, Odd B. Sylwan