GEARING

Introduced: September 1968

Description

F16H covers mechanical power transmission systems that transmit motion and torque between rotating shafts through direct contact of teeth, friction surfaces, or flexible elements. This subclass encompasses gear types including spur gears, helical gears, bevel gears, worm gears, and rack-and-pinion systems, as well as non-toothed alternatives such as friction wheels and belt/chain drives. The classification includes gear design, manufacture, lubrication, efficiency optimization, and integrated transmission assemblies across applications ranging from automotive and industrial machinery to household appliances. Related noise reduction, vibration damping, and gear material specifications are covered within this subclass.

Of 47 combined children, 30 exist in both systems.

17 codes are CPC-only extensions.

Note: 17 CPC extensions are marked as secondary classification only.

16 shared codes have differing titles between IPC and CPC.

Child Classifications

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F16H 1/00 Toothed gearings for conveying rotary motion (specific for conveying rotary motion with variable gear ratio or for reversing rotary motion F16H3/00) +2 CPC IPC+CPC Available in IPC and CPC
F16H 13/00 Gearing for conveying rotary motion with constant gear ratio by friction between rotary members IPC+CPC Available in IPC and CPC
F16H 15/00 Gearings for conveying rotary motion with variable gear ratio, or for reversing rotary motion, by friction between rotary members (control of change-speed or reversing-gearings conveying rotary motion F16H59/00 - F16H63/00) IPC+CPC Available in IPC and CPC
F16H 19/00 Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion (with intermittently-driving members F16H27/00 - F16H31/00) +1 CPC IPC+CPC Available in IPC and CPC
F16H 21/00 Gearings comprising primarily only links or levers, with or without slides (F16H23/00 takes precedence) IPC+CPC Available in IPC and CPC
F16H 2200/00 Transmissions for multiple ratios 2nd only +9 CPC CPC only CPC only
F16H 23/00 Wobble-plate gearings; Oblique-crank gearings IPC+CPC Available in IPC and CPC
F16H 2300/00 Determining of new ratio 2nd only +3 CPC CPC only CPC only
F16H 2302/00 Determining the way or trajectory to new ratio, e.g. by determining speed, torque or time parameters for shift transition 2nd only +3 CPC CPC only CPC only
F16H 2306/00 Shifting 2nd only +9 CPC CPC only CPC only
F16H 2312/00 Driving activities 2nd only +11 CPC CPC only CPC only
F16H 2342/00 Calibrating 2nd only +4 CPC CPC only CPC only
F16H 25/00 Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms IPC+CPC Available in IPC and CPC
F16H 27/00 Step-by-step mechanisms without freewheel members, e.g. Geneva drives IPC+CPC Available in IPC and CPC
F16H 2700/00 Transmission housings and mounting of transmission components therein; Cooling; Lubrication; Flexible suspensions, e.g. floating frames 2nd only +2 CPC CPC only CPC only
F16H 2702/00 Combinations of two or more transmissions 2nd only +2 CPC CPC only CPC only
F16H 2704/00 Control mechanisms and elements applying a mechanical movement 2nd only +2 CPC CPC only CPC only
F16H 2706/00 Rotary transmissions with mechanical energy accumulation and recovery without means for automatic selfregulation essentially based on spring action or inertia 2nd only CPC only CPC only
F16H 2708/00 Control devices for speed-changing geared mechanisms, e.g. specially adapted couplings for synchronising devices, devices to simplify control, control of auxiliary gearboxes 2nd only +4 CPC CPC only CPC only
F16H 2710/00 Control devices for speed-change mechanisms, the speed change control is dependent on function parameters of the gearing 2nd only +5 CPC CPC only CPC only