4. Rotary expansible chamber devices
  5. Multistage

James E. Kraus

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Downhole motor universal joint assembly

Rotary shafts – gudgeons – housings – and flexible couplings for ro – Flexible coupling between fluid-conducting rotary shafts – Relative angular displacement of axes of shafts
Reexamination Certificate

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Rotor-to-rotor coupling

Rotary expansible chamber devices – Multistage
Patent

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Profile ID: LFUS-PAI-P-1263241

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