Patent ID: 8727660
Filing Date: 2014-05-20
Classification: E02D

Abstract:
1. Arrangement for providing a pulsing compressive force, comprising a) an exciter part with an unbalance exciter for producing an intermittent exciter force and with a contact surface for transmitting a force component of the exciter force, directed perpendicularly to the contact surface, as a pulsing compressive force, to a tool or a work surface to be impinged with the compressive force, and b) a vibration damper part which is connected to the exciter part by means of a spring damper unit, for forming a system capable of being excited to resonant oscillations by the unbalance exciter, characterized in that the arrangement has an idle part which is connected to the exciter part or to the vibration damper part in such a way that it forms a contiguous unit with the exciter part or the vibration damper part, but is however substantially decoupled from them in terms of oscillations, the arrangement is further adapted to vary during operation the spring stiffness (k