Manual bowed rotor and full override
US-2018346100-A1 · Dec 6, 2018 · US
Turning or inching gear
Turning or inching gear · 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 | F01D25/34 |
| Official title | Turning or inching gear |
| Display label | Turning or inching gear |
| Total patents | 256 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 15 |
| 2017 | 20 |
| 2018 | 24 |
| 2019 | 31 |
| 2020 | 40 |
| 2021 | 39 |
| 2022 | 30 |
| 2023 | 20 |
| 2024 | 16 |
| 2025 | 16 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Bowed rotor motoring control
US-2018340475-A1 · Nov 29, 2018 · US
Outer diffuser case for a gas turbine engine
US-10100675-B2 · Oct 16, 2018 · US
Mechanical flywheel for bowed rotor mitigation
US-2018283274-A1 · Oct 4, 2018 · US
Engine turning motor via pneumatic or hydraulic motor
US-2018283199-A1 · Oct 4, 2018 · US
Air turbine starter with automated variable inlet vanes
US-2018266328-A1 · Sep 20, 2018 · US
Turning device and rotary machine
US-10072529-B2 · Sep 11, 2018 · US
Dual inline valve with manual override
US-2018209347-A1 · Jul 26, 2018 · US
Dual inline starter air valve
US-2018209349-A1 · Jul 26, 2018 · US
Rotatable vanes
US-2018202321-A1 · Jul 19, 2018 · US
Gas turbine engine wash system
US-2018149038-A1 · May 31, 2018 · US
Dual inline starter air valve
US-9957899-B1 · May 1, 2018 · US
Combined cycle power plant thermal energy conservation
US-9945266-B2 · Apr 17, 2018 · US
Device and method for gas turbine unlocking
US-2018094585-A1 · Apr 5, 2018 · US
Rotor pivoting system
US-2018051592-A1 · Feb 22, 2018 · US
Rotor turning system and method
US-2018051593-A1 · Feb 22, 2018 · US
Pre-start motoring synchronization for multiple engines
US-2018022463-A1 · Jan 25, 2018 · US
Multi-engine coordination during gas turbine engine motoring
US-2018023413-A1 · Jan 25, 2018 · US
Gas turbine engine starter reduction gear train with geared rotary actuator
US-2018010523-A1 · Jan 11, 2018 · US
Bowed rotor sensor system
US-2018010480-A1 · Jan 11, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F01D25/34?
- CPC F01D25/34 is the Cooperative Patent Classification code for “Turning or inching gear.”
- How many patents are filed under CPC F01D25/34 (Turning or inching gear)?
- Our database includes 256 publications tagged with this CPC code.
- Is patent activity under CPC F01D25/34 growing?
- Publication counts under this code: 16 in 2024 vs 16 in 2025 (latest complete years).