4. Expansible chamber devices
  5. Collapsible chamber wall portion
  6. Wall portion formed of flexible material

John W. Ells

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Leak sealing method

Pipes and tubular conduits – Repairing
Patent

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Pressure device

Expansible chamber devices – Collapsible chamber wall portion – Wall portion formed of flexible material
Patent

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Seals

Valves and valve actuation – With means to increase head and seat contact pressure – With positive reduction
Patent

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Profile ID: LFUS-PAI-P-1075647

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