4. Boring or penetrating the earth
  5. Bit or bit element
  6. Rolling cutter bit or rolling cutter bit element

Dennis D. Fuller

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Fluid actuated rock drill hammer

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

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Rock bit

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Rock bit with bearing lubricant reservoir

Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – With fluid pressure-actuated feed means
Patent

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Profile ID: LFUS-PAI-P-776399

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