4. Tool driving or impacting
  5. Automatic control of power operated means
  6. Tool advance causing or controlling means

Central Mine Equipment Company

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Apparatus and method for taking soil samples

Boring or penetrating the earth – Processes – Sampling of earth formations
Patent

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Automatic drive hammer system

Tool driving or impacting – Means to control advance and cyclically reciprocate a... – Relatively elevated guide engaging cable between drive and...
Patent

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Drill rig hoist

Implements or apparatus for applying pushing or pulling force – Step-by-step traveling bar – Pawl actuated
Patent

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Drill rig shut-off system

Tool driving or impacting – Automatic control of power operated means – Tool advance causing or controlling means
Patent

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Drill rod holding and break-out device

Tools – Wrench – screwdriver – or driver therefor – Machine
Patent

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Profile ID: LFUS-PAI-P-557100

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