F05D 2270/304
Spool rotational speed
F05D2270/304 (Spool rotational speed) appears on 637 US grants and 761 published applications in this corpus.
Search patents in F05D- Granted patents
- 637
- Published applications
- 761
- Assignees
- 170
- Inventors
- 1,375
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 1 |
| 2002 | 7 | 5 |
| 2003 | 5 | 12 |
| 2004 | 12 | 10 |
| 2005 | 6 | 15 |
| 2006 | 10 | 8 |
| 2007 | 7 | 22 |
| 2008 | 7 | 18 |
| 2009 | 10 | 8 |
| 2010 | 13 | 27 |
| 2011 | 13 | 22 |
| 2012 | 13 | 12 |
| 2013 | 18 | 20 |
| 2014 | 12 | 26 |
| 2015 | 12 | 25 |
| 2016 | 19 | 44 |
| 2017 | 25 | 45 |
| 2018 | 36 | 69 |
| 2019 | 60 | 43 |
| 2020 | 47 | 66 |
| 2021 | 55 | 83 |
| 2022 | 68 | 58 |
| 2023 | 64 | 39 |
| 2024 | 58 | 31 |
| 2025 | 37 | 30 |
| 2026 | 13 | 22 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for overspeed detection and protection in an engine15 Sep 2026US 12,735,993 B2General Electric Company
- Gas turbine engine1 Sep 2026US 12,723,547 B2Kawasaki Jukogyo Kabushiki Kaisha
- Control for electrically assisted turbines4 Aug 2026US 12,698,748 B2Pratt & Whitney Canada Corp.
- Gas turbine engine16 Jun 2026US 12,655,803 B2General Electric Company
- Gas turbine acceleration limit biasing for premature asymmetric operating regime exits26 May 2026US 12,637,986 B2Pratt & Whitney Canada Corp.
- Aircraft propulsion system with turbine engine coupled to an electric generator the power of which is limited as a function of engine speed3 Sep 2026US 2026/0258734 A1Safran Aircraft Engines
- Aircraft engine27 Aug 2026US 2026/0251093 A1ROLLS-ROYCE plc
- Turbo-expander overspeed protection20 Aug 2026US 2026/0243203 A1NET Power LLC
- Systems for and methods of backspin analysis for pumps23 Jul 2026US 2026/0210232 A1Sensia Netherlands B.V.
- Gas turbine engine with starting system and method for using the same23 Jul 2026US 2026/0210294 A1Rtx Corporation
Most cited
By later US patents
- System and method for providing gas turbine engine output torque sensor validation and sensor backup using a speed sensor193US 8,352,149 B2Honeywell International Inc. · 2013
- Foil bearing rotary flow compressor with control valve70US 6,751,941 B2Capstone Turbine Corporation · 2004
- Apparatus for observing combustion conditions in a gas turbine engine64US 7,484,369 B2Rosemount Aerospace Inc. · 2009
- Method of operating a gas turbine engine63US 7,926,287 B2Pratt & Whitney Canada Corp. · 2011
- Transient turbine exhaust temperature control for a turbogenerator59US 6,612,112 B2Capstone Turbine Corporation · 2003