Patent ID: 6634472
Filing Date: 2003-10-21
Classification: F16F

Abstract:
A tuned mass damper comprising:a container having inner walls; a mass disposed within the container; a first pair of oppositely directed fluid containment assemblies each comprising a cup-shaped member and an expandable bellows connected to the mass to define a fluid chamber containing a damping fluid, the first pair of oppositely directed fluid containment assemblies permitting motion of the mass along a first axis; a second pair of oppositely directed fluid containment assemblies each comprising a cup-shaped member and an expandable bellows connected to the mass to define a fluid chamber containing a damping fluid, the second pair of oppositely directed fluid containment assemblies permitting motion of the mass along a second axis; first and second springs connected in series with the first pair of fluid containment assemblies for biasing the first pair of containment assemblies between opposite inner walls of the container, the first and second springs each having an outside diameter less than an inside diameter of the cup-shaped members to allow translational deflection of the mass about an axis other than the first axis; and third and fourth springs connected in series with the second pair of fluid containment assemblies for biasing the second pair of containment assemblies between opposite inner walls of the container, the third and fourth springs each having an outside diameter less than an inside diameter of the cup-shaped members to allow translational deflection of the mass about an axis other than the second axis.