4. Boring or penetrating the earth
  5. With storage means for bit lubricant carried by bit or shaft
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Load responsive hydrodynamic bearing

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

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Low pressure differential compensator

Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – With fluid pressure-actuated feed means
Patent

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Lube reservoir protection for rock bits

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

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Lubricant pressure compensator for an earth boring drill bit

Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – With fluid pressure-actuated feed means
Patent

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Lubricant pressure relief valve for earth penetrating tools

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

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Lubricating device

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

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Lubricating device

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

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Lubricating grease

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

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Lubrication system for an earth boring drill bit and methods for

Boring or penetrating the earth – With storage means for bit lubricant carried by bit or shaft – With fluid pressure-actuated feed means
Patent

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