F04D 19/026
With a plurality of shafts rotating at different speeds
Official title: {with a plurality of shafts rotating at different speeds (F04D19/022 takes precedence)}
F04D19/026 (With a plurality of shafts rotating at different speeds) appears on 31 US grants and 33 published applications in this corpus.
Search patents in F04D- Granted patents
- 31
- Published applications
- 33
- Assignees
- 23
- Inventors
- 72
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 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 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 2 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 2 |
| 2013 | 0 | 3 |
| 2014 | 1 | 0 |
| 2015 | 3 | 1 |
| 2016 | 2 | 7 |
| 2017 | 2 | 1 |
| 2018 | 0 | 3 |
| 2019 | 2 | 1 |
| 2020 | 3 | 1 |
| 2021 | 0 | 2 |
| 2022 | 2 | 3 |
| 2023 | 4 | 3 |
| 2024 | 5 | 2 |
| 2025 | 4 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Surge recovery system and methods4 Nov 2025US 12,460,584 B2Rtx Corporation
- Flow control device for axial flow turbomachines in series23 Sep 2025US 12,421,858 B1The United States of America as represented by the Secretary of the Navy
- Arrangement for pressurizing of fluid24 Jun 2025US 12,338,828 B2Vetco Gray Scandinavia.AS
- Compressor with counter-rotating blade rows14 Jan 2025US 12,196,129 B2General Electric Company
- Arrangement for pressurizing of fluid30 Jul 2024US 12,049,900 B2Vetco Gray Scandinavia.AS
- Arrangement for pressurizing of fluid10 Oct 2024US 2024/0337264 A1Vetco Gray Scandinavia.AS
- Surge recovery system and methods12 Sep 2024US 2024/0301834 A1Rtx Corporation
- Modular multistage turbine system for gas turbine engines14 Sep 2023US 2023/0287834 A1Rolls-Royce North American Technologies Inc.
- Arrangement for pressurizing of fluid27 Jul 2023US 2023/0235740 A1Vetco Gray Scandinavia.AS
- Fused soft and hard bearing rings20 Apr 2023US 2023/0117756 A1Safran Aircraft Engines
Most cited
By later US patents
- Aircraft engine with separate auxiliary rotor and fan rotor44US 7,765,786 B2MTU Aero Engines AG · 2010
- Power transmission system for turbine or compressor having counter-rotating blades20US 9,745,860 B12017
- Systems and methods for changing a speed of a compressor boost stage in a gas turbine18US 9,328,667 B2Pratt & Whitney Canada Corp. · 2016
- Gas turbine with at least one multi-stage compressor unit including several compressor modules9US 8,251,639 B2Rolls-Royce Deutchland Ltd Co KG · 2012
- Vacuum pump8US 4,878,813 ASeiki Seiki Kabushiki Kaisha · 1989