4. Boring or penetrating the earth
  5. Cutter element laterally shiftable below ground
  6. Pivoted about substantially longitudinal axis

Harry A. I. Wiredal

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Drill tool

Boring or penetrating the earth – Cutter element laterally shiftable below ground – Pivoted about substantially longitudinal axis
Patent

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Means for drilling

Boring or penetrating the earth – Tool removable or insertable through or around driving or... – Laterally shiftable cutter element movable through shaft
Patent

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Means for drilling

Boring or penetrating the earth – Tool removable or insertable through or around driving or... – Laterally shiftable cutter element movable through shaft
Patent

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Thread structure for percussion rock drilling

Joints and connections – Screw or cam
Patent

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Profile ID: LFUS-PAI-P-884428

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