4. Tool driving or impacting
  5. Means to drive tool about an axis
  6. Means to hold and relatively rotate sections of tool shaft

Sven P. Liljebrand

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Drill bit

Tool driving or impacting – Work cleansing – Cleansing fluid passage in impact transmitting anvil
Patent

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Drill bit having a flushing medium channel

Boring or penetrating the earth – With tool shaft detail – Axially telescoping shaft section
Patent

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Drill string element

Tool driving or impacting – Means to drive tool about an axis – Means to hold and relatively rotate sections of tool shaft
Patent

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Profile ID: LFUS-PAI-P-1137653

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