F05D 2270/022
To prevent underspeed
Official title: to prevent underspeed
F05D2270/022 (To prevent underspeed) appears on 13 US grants and 12 published applications in this corpus.
Search patents in F05D- Granted patents
- 13
- Published applications
- 12
- Assignees
- 16
- Inventors
- 38
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 2 |
| 2018 | 1 | 1 |
| 2019 | 1 | 0 |
| 2020 | 2 | 1 |
| 2021 | 1 | 1 |
| 2022 | 0 | 1 |
| 2023 | 2 | 0 |
| 2024 | 0 | 0 |
| 2025 | 2 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Mitigation of rotating stall in turbine exhaust section using segmented auxiliary struts30 Sep 2025US 12,428,973 B2GE Infrastructure Technology LLC
- Mitigation of rotating stall in turbine exhaust section using inner flow control vanes11 Feb 2025US 12,221,896 B1GE Infrastructure Technology LLC
- Aircraft propulsion system24 Oct 2023US 11,795,834 B2Honda Motor Co., Ltd.
- Dual motor system29 Aug 2023US 11,739,759 B2Nidec Motor Corporation
- Turbine rotor assembly having a retaining collar for a bayonet mount6 Apr 2021US 10,968,744 B2ROLLS-ROYCE plc
- Idle speed maintenance control method and device9 Jul 2026US 2026/0194022 A1Safran Aircraft Engines
- Mitigation of rotating stall in turbine exhaust section using flow control vanes22 Jan 2026US 2026/0022646 A1GE Vernova Infrastructure Technology LLC
- Mitigation of rotating stall in turbine exhaust section using segmented auxiliary struts26 Jun 2025US 2025/0207507 A1GE Infrastructure Technology LLC
- Aircraft propulsion system15 Sep 2022US 2022/0290606 A1Honda Motor Co., Ltd.
- Dual motor system29 Apr 2021US 2021/0123442 A1Nidec Motor Corporation
Most cited
By later US patents
- Fuel control for controlling helicopter rotor/turbine acceleration24US 4,423,593 AChandler Evans Inc. · 1984
- Helicopter engine control with rotor speed decay anticipator24US 4,466,526 AChandler Evans Inc. · 1984
- Speed stabilization apparatus for two shaft gas turbine10US 5,276,353 AEbara Corporation · 1994
- Anti-flameout safety system for a gas turbine engine9US 5,265,414 ASociete Nationale d'Etude et de Construction de Moteurs D'Aviation "S.N.E.C.M A." · 1993
- System for braking a low pressure spool in a gas turbine engine6US 10,837,312 B2Pratt & Whitney Canada Corp. · 2020