Regulating or controlling by varying flow (for reversing F01D1/30; by varying rotor-blade position F01D7/00; specially for starting F01D19/00; shutting-down F01D21/00; regulating or controlling in general G05 )

Child Classifications

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• F01D 17/02 Arrangement of sensing elements
• F01D 17/10 Final actuators (valves in general F16K )
• F01D 17/20 Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted (sensing elements alone F01D17/02; final actuators alone F01D17/10)