4. Tool driving or impacting
  5. With vehicle support for drive
  6. Pivoted

Carl F. Back

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Continuous drill feed apparatus

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

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Drill feeding and hoisting system for an earthdrill

Tool driving or impacting – With vehicle support for drive – Drive structure moved to nonuse position for transport
Patent

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Drilling rig

Tool driving or impacting – With vehicle support for drive – Drive structure moved to nonuse position for transport
Patent

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Hydraulic cylinder powered double acting duplex piston pump

Pumps – Processes
Reexamination Certificate

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No load derrick for drilling rig

Tool driving or impacting – With vehicle support for drive – Pivoted
Patent

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Profile ID: LFUS-PAI-P-366166

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