F01D 25/22
Using working-fluid or other gaseous fluid as lubricant
Official title: using working-fluid or other gaseous fluid as lubricant
F01D25/22 (Using working-fluid or other gaseous fluid as lubricant) appears on 176 US grants and 173 published applications in this corpus.
Search patents in F01D- Granted patents
- 176
- Published applications
- 173
- Assignees
- 91
- Inventors
- 390
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 4 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 4 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 5 | 4 |
| 2002 | 3 | 2 |
| 2003 | 3 | 1 |
| 2004 | 0 | 4 |
| 2005 | 3 | 3 |
| 2006 | 1 | 2 |
| 2007 | 2 | 4 |
| 2008 | 0 | 4 |
| 2009 | 3 | 4 |
| 2010 | 1 | 2 |
| 2011 | 3 | 4 |
| 2012 | 2 | 5 |
| 2013 | 5 | 12 |
| 2014 | 4 | 8 |
| 2015 | 5 | 10 |
| 2016 | 8 | 13 |
| 2017 | 12 | 13 |
| 2018 | 13 | 19 |
| 2019 | 15 | 14 |
| 2020 | 19 | 11 |
| 2021 | 9 | 7 |
| 2022 | 12 | 9 |
| 2023 | 10 | 2 |
| 2024 | 8 | 9 |
| 2025 | 2 | 4 |
| 2026 | 0 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electric turbocharger15 Apr 2025US 12,276,226 B2
- Bearing configuration for a rotational equipment assembly21 Jan 2025US 12,203,413 B1Rtx Corporation
- Method and system for de-priming an aircraft engine component containing a flammable fluid for fire safety17 Dec 2024US 12,168,936 B2Pratt & Whitney Canada Corp.
- Seal support assembly for a turbine engine15 Oct 2024US 12,116,896 B1General Electric Company
- Buffer air system for a bearing compartment15 Oct 2024US 12,116,900 B2Rtx Corporation
- Turbomachine27 Aug 2026US 2026/0251078 A1Kawasaki Jukogyo Kabushiki Kaisha
- System and method for reducing wear in a gearbox during a wash event of a gas turbine engine18 Jun 2026US 2026/0168394 A1General Electric Company
- Vibration dampening assembly for bearing systems9 Apr 2026US 2026/0098563 A1Hamilton Sundstrand Corporation
- Active control of gearbox case pressure30 Oct 2025US 2025/0334078 A1Hamilton Sundstrand Corporation
- Rocket Engine7 Aug 2025US 2025/0250952 A1Astron Systems, Inc.
Most cited
By later US patents
- Rotary pump with hydrodynamically suspended impeller327US 6,227,797 B1VentrAssist Pty Ltd and University of Technology · 2001
- Rotary pump with hydrodynamically suspended impeller194US 6,609,883 B2University of Technology, Sydney · 2003
- Rotary pump with exclusively hydrodynamically suspended impeller167US 6,966,748 B2Ventrassist PTY Ltd. and University of Technology at Sydney · 2005
- Rotary pump with exclusively hydrodynamically suspended impeller81US 6,250,880 B1Ventrassist Pty Ltd. · 2001
- Rotary pump with exclusively hydrodynamically suspended impeller76US 7,476,077 B2University of Technology at Sydney · 2009