Arrangements for monitoring the condition or operation of elastic sealings (F16J15/326 takes precedence); Arrangements for control of elastic sealings, e.g. of their geometry or stiffness

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Sealings > between relatively-moving surfaces (F16J15/50, F16J15/52 take precedence; bellows pistons F16J3/06; piston-rings or ring sealings of similar construction F16J9/00) > with elastic sealings, e.g. O-rings > Arrangements for monitoring the condition or operation of elastic sealings (F16J15/326 takes precedence); Arrangements for control of elastic sealings, e.g. of their geometry or stiffness