Patent ID: 7246797

Claim:
A device for damping vibrations in a vibration surface of the frequency tuned resonance damper kind, the device comprising: at least one elastic damping element with a set axis of symmetry; and a vibration body, which is only a dead weight, supported by said at least one damping element, said at least one damping element and said vibration body together being tuned to damp the vibrations of said vibration surface within a selected frequency range by bringing the vibration body into vibrations which are phase shifted essentially across the symmetry axis of the at least one damping element relative to the vibrational movements of the vibration surface, and in so doing creating forces which counteract the vibrations of the vibration surface, the at least one damping element including first holding members for holding said at least one damping element at the vibration surface, said first holding members including first mutually co-operating form grip members for form grip between said at least one damping element and at least one of the vibration surface and an intervening fastening element fixedly attached to the vibration surface, and second holding members for holding the vibration body at said at least one damping element, said second holding members including second mutually co-operating form grip members for form grip between said at least one damping element and the vibration body, wherein both the first and second form grip members include a recess with a gripping surface for transferring vibrations, and wherein the at least one damping element includes an inwards facing cavity forming an opening in a base surface of the at least one damping element, said at least one damping element being tuned to the selected frequency range based upon dimensions of the cross sectional area of the at least one damping element and material of the at least one damping element.