4. Boring or penetrating the earth
  5. Bit or bit element
  6. Plural separable cutter elements

William Lister

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Pneumatic percussion hammer

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

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Pneumatic percussion hammer

Tool driving or impacting – Work cleansing – By motive fluid for drive motor or advance causing or...
Patent

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Pneumatic percussion hammers

Boring or penetrating the earth – With below-ground tool drive prime mover
Patent

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Pneumatic tool

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

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Rock-drilling bit for percussion hammers

Boring or penetrating the earth – Bit or bit element – Plural separable cutter elements
Patent

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Profile ID: LFUS-PAI-P-850565

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