Gear changing system for an accessory gearbox of an aircraft turbine engine and method of use
US-2025369396-A1 · Dec 4, 2025 · US
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Complexes, not using actuatable speed-changing or regulating members, e.g. with gear ratio determined by free play of frictional or other forces
Complexes, not using actuatable speed-changing or regulating members, e.g. with gear ratio determined by free play of frictional or other forces · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F16H3/74 |
| Official title | Complexes, not using actuatable speed-changing or regulating members, e.g. with gear ratio determined by free play of frictional or other forces |
| Display label | Complexes, not using actuatable speed-changing or regulating members, e.g. with gear ratio determined by free play of frictional or other forces |
| Total patents | 10 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 2 |
| 2019 | 2 |
| 2023 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Electric drive system for a motor vehicle
US-2025361925-A1 · Nov 27, 2025 · US
Speed-changing device
US-11674576-B2 · Jun 13, 2023 · US
Speed-Changing Device
US-2023147860-A1 · May 11, 2023 · US
Engine starter with torque variator
US-10415531-B2 · Sep 17, 2019 · US
Drive transmission device
US-10203024-B2 · Feb 12, 2019 · US
Drive transmission device
US-2017356526-A1 · Dec 14, 2017 · US
Hybrid power train
US-9676265-B2 · Jun 13, 2017 · US
Hybrid power train
US-2016167502-A1 · Jun 16, 2016 · US
Engine starter with torque variator
US-2015275842-A1 · Oct 1, 2015 · US