F16H 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.
Additional Content IPC
Varying the speed ratio of driving or feeding mechanisms of machine tools , Conjoint control of drive units for vehicles Cycle transmissions Marine propulsion
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 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 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 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
Top Applicants
Top Applicants (IPC)
Class F16,2013–2023, worldwide · Source: EPO PATSTAT
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 21,545
- ZAHNRADFABRIK FRIEDRICHSHAFEN DE 9,446
- TOYOTA MOTOR CORPORATION 7,215
- HYUNDAI MOTOR COMPANY KR 6,846
- ROBERT BOSCH DE 6,106
- NTN CORPORATION 5,305
- SKF SE 4,219
- KIA MOTORS CORPORATION KR 3,852
- NSK 3,850
- HONDA MOTOR COMPANY 3,639
Top Applicants (CPC)
Class F16,2013–2023, worldwide · Source: EPO PATSTAT
- SCHAEFFLER TECHNOLOGIES & COMPANY DE 22,817
- ZAHNRADFABRIK FRIEDRICHSHAFEN DE 10,523
- HYUNDAI MOTOR COMPANY KR 7,933
- ROBERT BOSCH DE 7,059
- KIA MOTORS CORPORATION KR 4,867
- SKF SE 4,729
- TOYOTA MOTOR CORPORATION JP 4,111
- FORD GLOBAL TECHNOLOGIES US 3,838
- GM GLOBAL TECHNOLOGY OPERATIONS US 3,575
- TOYOTA MOTOR CORPORATION 3,499