4. Tool driving or impacting
  5. Processes

Erkki Ahola

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Control valve and a method for a percussion device with a...

Motors: expansible chamber type – Fluid supply through diverse paths to single expansible chamber – Selective cyclic and noncyclic operation or parking
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Control valve in a percussion device and a method comprising...

Motors: expansible chamber type – Cyclically operable
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Impact device

Boring or penetrating the earth – With above-ground means to impact an earth-penetrating means
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Impact device with a rotable control valve

Tool driving or impacting – Impacting devices – Selective axial direction of impact
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Method and rock drilling rig for hole drilling

Boring or penetrating the earth – Processes
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Profile ID: LFUS-PAI-P-2415004

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