4. Bearings
  5. Rotary bearing
  6. Roller drill bit

William J. Neilson

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Abrasion resistant bearing seal

Cutlery
Patent

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Dynamic O-ring seal

Bearings – Rotary bearing – Roller drill bit
Patent

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Method for constructing a multiple segment rock bit

Metal tools and implements – making – Blank or process – Drill
Patent

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Replaceable wear pad for a rock bit cutter yoke

Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Patent

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Rock bit bearing seal

Cutlery
Patent

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Profile ID: LFUS-PAI-P-109545

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