F01D 25/34
Turning or inching gear
F01D25/34 (Turning or inching gear) appears on 241 US grants and 249 published applications in this corpus.
Search patents in F01D- Granted patents
- 241
- Published applications
- 249
- Assignees
- 66
- Inventors
- 476
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 2 | 5 |
| 2007 | 1 | 3 |
| 2008 | 0 | 4 |
| 2009 | 1 | 3 |
| 2010 | 4 | 2 |
| 2011 | 5 | 8 |
| 2012 | 1 | 2 |
| 2013 | 4 | 7 |
| 2014 | 6 | 8 |
| 2015 | 5 | 3 |
| 2016 | 4 | 17 |
| 2017 | 11 | 26 |
| 2018 | 8 | 33 |
| 2019 | 33 | 16 |
| 2020 | 29 | 31 |
| 2021 | 24 | 21 |
| 2022 | 23 | 18 |
| 2023 | 16 | 10 |
| 2024 | 14 | 16 |
| 2025 | 19 | 9 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electric enhanced transmission for multi-spool load-sharing turbofan engine10 Mar 2026US 12,571,352 B2Rtx Corporation
- Method for controlling a gas turbine engine30 Dec 2025US 12,509,997 B2Safran Aircraft Engines
- System and method for mitigating bowed rotor in a gas turbine engine25 Nov 2025US 12,480,423 B2General Electric Company
- Method of mitigating rotor bow in a turbine engine rotor14 Oct 2025US 12,442,303 B1General Electric Company
- Multi-mode starter control for gas turbine engines30 Sep 2025US 12,428,997 B2Rtx Corporation
- System and method for cleaning gas turbine engines18 Jun 2026US 2026/0168401 A1General Electric Company
- Solenoid valve for preventing wear in a gearbox during a wash event of a gas turbine engine18 Jun 2026US 2026/0168436 A1General Electric Company
- Power converter topology and control scheme for mitigating thermal bowing in gas turbine engines11 Jun 2026US 2026/0160187 A1General Electric Company
- Anti-rotation tool for aircraft engine rotational equipment23 Apr 2026US 2026/0109480 A1Pratt & Whitney Canada Corp.
- Scavenge pump assembly for an aircraft engine oil system2 Apr 2026US 2026/0092539 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- Differential geared turbine engine with torque modulation capability165US 6,895,741 B2Pratt & Whitney Canada Corp. · 2005
- Device and method for gas turbine unlocking112US 9,845,730 B2Nuovo Pignone S.p.A. · 2017
- Aircraft with disengageable engine and auxiliary power unit components72US 7,805,947 B22010
- Methods and systems for mitigating distortion of gas turbine shaft72US 8,820,046 B2General Electric Company · 2014
- Method of operating a gas turbine engine63US 7,926,287 B2Pratt & Whitney Canada Corp. · 2011