4. Motors: expansible chamber type
  5. Cyclically operable
  6. With dwell

E. Don Jackson

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Control system for pile hammers

Tool driving or impacting – Drive controlled by relative axial movement of tool
Patent

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Control valve for pile driver and method

Motors: expansible chamber type – Cyclically operable – With dwell
Patent

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Railcar mover having negative cambered rail wheels

Railway rolling stock – Locomotives – With land engaging wheel
Reexamination Certificate

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Profile ID: LFUS-PAI-P-316813

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