Reduction of vibrations produced by small pneumatic hammers

Small pneumatic hammers are largely used in the processing of stony materials, both for artistic and building purposes. These tools are characterized by the alternative movement of the instrument (chisel, bush hammer, etc...) and vibrations at the handle are particularly relevant. An italian factory (Torneria Aloisi Luciano & C., Verona) has designed a prototype in order to reduce the vibrations transmitted to the operators. Such a prototype has been characterized by the authors both in working conditions and in laboratory. Experimental results have shown relevant reduction in the vibration transmitted to the operator.