4. Mining or in situ disintegration of hard material
  5. Cutter tooth or tooth head
  6. Tooth mounted on helical head portion or head with helical...

James R. O'Connell

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Coupling structure for a compound drill stem

Boring or penetrating the earth – With above-ground means for handling drilling fluid or cutting – With tool shaft having plural passages for drilling fluid
Patent

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Mining machine bit and mounting thereof

Mining or in situ disintegration of hard material – Cutter tooth or tooth head – Tooth mounted on helical head portion or head with helical...
Patent

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Profile ID: LFUS-PAI-P-1164438

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