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

Introduced: September 1968

Of 12 combined children, 7 exist in both systems.

5 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

Child Classifications

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F15B 21/001 CPC only CPC only
F15B 21/003 CPC only CPC only
F15B 21/005 CPC only CPC only
F15B 21/006 CPC only CPC only
F15B 21/008 CPC only CPC only
F15B 21/02 Servomotor systems with program control derived from a store or timing device; Control devices therefor IPC+CPC Available in IPC and CPC
F15B 21/04 Special measures taken in connection with the properties of the fluid IPC+CPC Available in IPC and CPC
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 +1 CPC IPC+CPC Available in IPC and CPC
F15B 21/08 Servomotor systems incorporating electrically operated control means (F15B21/02, take precedence) +3 CPC IPC+CPC Available in IPC and CPC
F15B 21/10 Delay devices or arrangements IPC+CPC Available in IPC and CPC
F15B 21/12 Fluid oscillators or pulse generators +1 CPC IPC+CPC Available in IPC and CPC
F15B 21/14 Energy-recuperation means since 1995 IPC+CPC Available in IPC and CPC