COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES

Introduced: September 1968

Description

F16D encompasses mechanical devices that connect rotating shafts, control torque transmission, and dissipate rotational energy in machinery. This subclass covers rigid and flexible couplings, universal joints, clutches for engaging/disengaging drive trains, and braking systems that arrest or regulate motion. Applications span automotive transmissions, industrial machinery, power transmission equipment, and mechanical control systems. Adjacent classes F16C (bearing and lubrication) and F16G (springs) address related but distinct mechanical functions.

Of 55 combined children, 39 exist in both systems.

10 codes are CPC-only extensions, 6 exist only in IPC.

Note: 10 CPC extensions are marked as secondary classification only.

29 shared codes have differing titles between IPC and CPC.

Child Classifications

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F16D 1/00 Couplings for rigidly connecting two coaxial shafts or other movable machine elements (attachment of wheels to axles for railway carriages B60B; for attachment of cranks to their shafts F16C3/10) IPC+CPC Available in IPC and CPC
F16D 11/00 Clutches in which the members have interengaging parts (arrangements for synchronisation F16D23/02) +4 CPC IPC+CPC Available in IPC and CPC
F16D 121/00 Type of actuator operation force since 2012 −4 IPC IPC only IPC only
F16D 123/00 Multiple operation forces since 2012 IPC only IPC only
F16D 125/00 Components of actuators since 2012 −2 IPC IPC only IPC only
F16D 127/00 Auxiliary mechanisms since 2012 −3 IPC IPC only IPC only
F16D 129/00 Type of operation source for auxiliary mechanisms since 2012 −4 IPC IPC only IPC only
F16D 13/00 Friction clutches (arrangements for synchronisation F16D23/02) IPC+CPC Available in IPC and CPC
F16D 131/00 Overall arrangement of the actuators or their elements, e.g. modular construction since 2012 −1 IPC IPC only IPC only
F16D 15/00 Clutches with wedging balls or rollers or with other wedgeable separate clutching members (freewheels, freewheel clutches F16D41/00) IPC+CPC Available in IPC and CPC
F16D 17/00 Clutches in which the drive is transmitted solely by virtue of the eccentricity of the contacting surfaces of clutch members which fit one around the other IPC+CPC Available in IPC and CPC
F16D 19/00 Clutches with mechanically-actuated clutching members not otherwise provided for IPC+CPC Available in IPC and CPC
F16D 21/00 Systems comprising a plurality of actuated clutches (for synchronisation F16D23/04) IPC+CPC Available in IPC and CPC
F16D 2121/00 Type of actuator operation force 2nd only +4 CPC CPC only CPC only
F16D 2123/00 Multiple operation forces 2nd only CPC only CPC only
F16D 2125/00 Components of actuators 2nd only +2 CPC CPC only CPC only
F16D 2127/00 Auxiliary mechanisms 2nd only +6 CPC CPC only CPC only
F16D 2129/00 Type of operation source for auxiliary mechanisms 2nd only +4 CPC CPC only CPC only
F16D 2131/00 Overall arrangement of the actuators or their elements, e.g. modular construction 2nd only +1 CPC CPC only CPC only
F16D 2200/00 Materials; Production methods therefor 2nd only +5 CPC CPC only CPC only