F04D 29/5846
Cooling by injection
Official title: {cooling by injection}
F04D29/5846 (Cooling by injection) appears on 120 US grants and 125 published applications in this corpus.
Search patents in F04D- Granted patents
- 120
- Published applications
- 125
- Assignees
- 71
- Inventors
- 324
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 7 | 3 |
| 2003 | 5 | 2 |
| 2004 | 1 | 1 |
| 2005 | 2 | 9 |
| 2006 | 3 | 5 |
| 2007 | 3 | 3 |
| 2008 | 7 | 3 |
| 2009 | 1 | 6 |
| 2010 | 5 | 0 |
| 2011 | 0 | 0 |
| 2012 | 3 | 7 |
| 2013 | 3 | 9 |
| 2014 | 1 | 2 |
| 2015 | 3 | 7 |
| 2016 | 1 | 11 |
| 2017 | 7 | 9 |
| 2018 | 4 | 8 |
| 2019 | 16 | 9 |
| 2020 | 7 | 4 |
| 2021 | 4 | 4 |
| 2022 | 2 | 5 |
| 2023 | 6 | 6 |
| 2024 | 6 | 6 |
| 2025 | 4 | 4 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Impeller back-face cooling aperture7 Jul 2026US 12,674,472 B1Pratt & Whitney Canada Corp.
- Centrifugal compressor with liquid injection23 Jun 2026US 12,663,023 B2Daikin Industries, Ltd.
- Impeller backface cooled P3 passage through diffuser/reducing high temp exposure of cooled air16 Jun 2026US 12,655,796 B1Pratt & Whitney Canada Corp.
- Fan exit guide vane thermal management system for conventional gas turbine engines24 Feb 2026US 12,560,126 B2Rtx Corporation
- Electric propulsion device1 Jul 2025US 12,344,391 B2Hitachi, Ltd.
- Steam compressor30 Apr 2026US 2026/0117796 A1TURBODEN S. p. A.
- Diffuser-turbine flow network15 Jan 2026US 2026/0015945 A1Rtx Corporation
- Fan exit guide vane thermal management system for conventional gas turbine engines18 Dec 2025US 2025/0382921 A1Rtx Corporation
- Centrifugal compressor with liquid injection13 Feb 2025US 2025/0052258 A1Daikin Industries, Ltd.
- Electric propulsion device16 Jan 2025US 2025/0019086 A1Hitachi, Ltd.
Most cited
By later US patents
- Method and apparatus for achieving power augmentation in gas turbine using wet compression104US 7,353,655 B2ALSTOM Technology Ltd · 2008
- Isothermal compression79US 4,478,553 AMechanical Technology Incorporated · 1984
- Wet compression apparatus and method74US 8,262,343 B2Vast Power Portfolio, LLC · 2012
- Cooling system for a turbine engine60US 9,995,314 B2General Electric Company · 2018
- Waste gas recovery systems53US 4,273,514 AFerakarn Limited · 1981