4. Tool driving or impacting
  5. Drive controlled by relative axial movement of tool

Hans-Dieter Piotrowski

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Dual-force hydraulic drive for a demolition tool

Solid material comminution or disintegration – Apparatus – Cooperating comminuting surfaces
Patent

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Hydraulically operated hammer drill

Tool driving or impacting – Drive controlled by relative axial movement of tool
Patent

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Hydraulically operated striking mechanism

Tool driving or impacting – Drive controlled by relative axial movement of tool
Patent

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Percussion mechanism for a drill rod unit

Tool driving or impacting – Impacting devices – Selective axial direction of impact
Patent

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Profile ID: LFUS-PAI-P-541943

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