Arrangements for sealing leaky tubes and conduits (stopping flow from or in pipes in general F16L55/10)

Child Classifications

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• F28F 11/02 using obturating elements, e.g. washers, inserted and operated independently of each other (F28F11/06 takes precedence)
• F28F 11/04 using pairs of obturating elements, e.g. washers, mounted upon central operating rods (F28F11/06 takes precedence)
• F28F 11/06 using automatic tube obturating appliances