F01D 17/22
The operation or power assistance being predominantly non-mechanical
Official title: the operation or power assistance being predominantly non-mechanical
F01D17/22 (The operation or power assistance being predominantly non-mechanical) appears on 240 US grants and 168 published applications in this corpus.
Search patents in F01D- Granted patents
- 240
- Published applications
- 168
- Assignees
- 85
- Inventors
- 481
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 16 | 0 |
| 1978 | 6 | 0 |
| 1979 | 6 | 0 |
| 1980 | 6 | 0 |
| 1981 | 7 | 0 |
| 1982 | 8 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 2 |
| 2003 | 2 | 1 |
| 2004 | 2 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 7 |
| 2008 | 1 | 2 |
| 2009 | 3 | 4 |
| 2010 | 2 | 7 |
| 2011 | 3 | 6 |
| 2012 | 6 | 5 |
| 2013 | 6 | 8 |
| 2014 | 4 | 3 |
| 2015 | 2 | 16 |
| 2016 | 5 | 13 |
| 2017 | 13 | 12 |
| 2018 | 6 | 12 |
| 2019 | 12 | 10 |
| 2020 | 12 | 13 |
| 2021 | 15 | 14 |
| 2022 | 8 | 11 |
| 2023 | 9 | 4 |
| 2024 | 11 | 7 |
| 2025 | 7 | 6 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fueldraulic heat management system21 Apr 2026US 12,607,147 B2ROLLS-ROYCE plc
- Element and method for compensation of tolerances and/or gap widths of a device and engine, assembly method for a shaft/hub connection13 Jan 2026US 12,523,160 B2Universität der Bundeswehr München
- Hydraulic drive valve monitoring device9 Dec 2025US 12,492,646 B2Kabushiki Kaisha Toshiba
- Turbine engine comprising an oil supply system2 Dec 2025US 12,486,799 B2Safran Aircraft Engines
- Turbofan engine including a fan actuation system25 Nov 2025US 12,480,415 B2General Electric Company
- Fueldraulic heat management system30 Jul 2026US 2026/0218659 A1ROLLS-ROYCE plc
- Turbo engine including a system to control pitch of a propeller blade4 Jun 2026US 2026/0153033 A1General Electric Company
- Modulated air flow heat exchanger system in bi-fi duct9 Apr 2026US 2026/0098500 A1Rtx Corporation
- Turbofan engine including a fan actuation system19 Feb 2026US 2026/0049557 A1General Electric Company
- System and method for measuring an axial position of a rotating component13 Nov 2025US 2025/0346347 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- Control system with adaptive process controllers especially adapted for electric power plant operation84US 3,939,328 AWestinghouse Electric Corp. · 1976
- Adjustable gain controller for valve position control loop and method for reducing jitter70US 4,556,956 AGeneral Electric Company · 1985
- Dedicated microcomputer-based control system for steam turbine-generators60US 4,280,060 AGeneral Electric Company · 1981
- System and method for starting, synchronizing and operating a steam turbine with digital computer control56US 4,267,458 AWestinghouse Electric Corp. · 1981
- Plant unit master control for fossil fired boiler implemented with a digital computer56US 4,445,180 AWestinghouse Electric Corp. · 1984