4. Boring or penetrating the earth
  5. With storage means for bit lubricant carried by bit or shaft
  6. Rotation of bit actuates lubricant feed means

Robert Higdon

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Drill bits with cone retention means

Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – Rotation of bit actuates lubricant feed means
Patent

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Portable drive assembly for a manual chain hoist

Implements or apparatus for applying pushing or pulling force – Apparatus for hauling or hoisting load – including driven... – Device includes rotatably driven – cable contacting drum
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1668543

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