4. Pipe joints or couplings
  5. Swivel
  6. Pipe in socket type

Bruce A. Hoegger

Inventor

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Hydraulic swivel having a labyrinth seal

Pipe joints or couplings – End to side or plate – Swivel with lateral port to annular sleeve
Reexamination Certificate

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Hydraulic swivel having selectively hardened portions

Pipe joints or couplings – Swivel – Pipe in socket type
Patent

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Profile ID: LFUS-PAI-P-1957401

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