Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass

Child Classifications

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• F15B 21/001
• F15B 21/003
• F15B 21/005
• F15B 21/006
• F15B 21/008
• F15B 21/02 Servomotor systems with program control derived from a store or timing device; Control devices therefor
• F15B 21/04 Special measures taken in connection with the properties of the fluid
• F15B 21/06 Use of special fluids, e.g. liquid metal; Special adaptations of fluid-pressure systems, or control of elements therefor, to the use of such fluids
• F15B 21/08 Servomotor systems incorporating electrically operated control means (F15B21/02, take precedence)
• F15B 21/10 Delay devices or arrangements
• F15B 21/12 Fluid oscillators or pulse generators
• F15B 21/14 Energy-recuperation means