F05D 2250/44
By counter rotation
Official title: by counter rotation
F05D2250/44 (By counter rotation) appears on 51 US grants and 59 published applications in this corpus.
Search patents in F05D- Granted patents
- 51
- Published applications
- 59
- Assignees
- 18
- Inventors
- 92
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2011 | 0 | 2 |
| 2012 | 0 | 2 |
| 2013 | 1 | 6 |
| 2014 | 2 | 2 |
| 2015 | 5 | 3 |
| 2016 | 2 | 3 |
| 2017 | 2 | 2 |
| 2018 | 3 | 7 |
| 2019 | 3 | 4 |
| 2020 | 9 | 6 |
| 2021 | 5 | 4 |
| 2022 | 5 | 3 |
| 2023 | 3 | 4 |
| 2024 | 4 | 6 |
| 2025 | 7 | 2 |
| 2026 | 0 | 3 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Ram air turbine23 Dec 2025US 12,503,249 B2ESS 2 Tech, LLC
- Architecture of a turbomachine with counter-rotating turbine23 Dec 2025US 12,503,976 B2Safran Aircraft Engines
- Gas turbine for twin-rotor aircraft2 Dec 2025US 12,486,818 B2Safran Aircraft Engines
- Aircraft turbomachine comprising a device for lubricating a bearing2 Sep 2025US 12,404,807 B2Safran Aircraft Engines
- Twin pump unit casing having motor mounted touchscreens29 Jul 2025US 12,372,091 B2S. A. Armstrong Limited
- Exhaust nozzle for a gas turbine engine6 Aug 2026US 2026/0226870 A1ROLLS-ROYCE plc
- Aircraft propulsion system with selectively rotatable open propulsor rotor16 Apr 2026US 2026/0104019 A1Rtx Corporation
- Ram air turbine26 Mar 2026US 2026/0084829 A1ESS 2 Tech, LLC
- Twin Pump Unit Casing Having Motor Mounted Touchscreens23 Oct 2025US 2025/0327456 A1S. A. Armstrong Limited
- Heat pump with improved energy efficiency4 Sep 2025US 2025/0277609 A1Awesome Lab Co., Ltd.
Most cited
By later US patents
- Method for balancing a propulsive system having non-hull contra-rotating propellers36US 8,998,580 B2Airbus Operations GmbH · 2015
- Counter-rotating low pressure turbine with gear system mounted to mid turbine frame27US 9,080,512 B2United Technologies Corporation · 2015
- Counter rotating turbine with reversing reduction gear assembly21US 10,801,442 B2General Electric Company · 2020
- Counter rotating low pressure turbine with splitter gear system21US 9,028,200 B2United Technologies Corporation · 2015
- Power transmission system for turbine or compressor having counter-rotating blades20US 9,745,860 B12017