F01D 25/18
Lubricating arrangements
Official title: Lubricating arrangements (of machines or engines in general F01M)
F01D25/18 (Lubricating arrangements) appears on 2,360 US grants and 2,393 published applications in this corpus.
Search patents in F01D- Granted patents
- 2,360
- Published applications
- 2,393
- Assignees
- 350
- Inventors
- 3,519
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 11 | 0 |
| 1980 | 4 | 0 |
| 1981 | 7 | 0 |
| 1982 | 8 | 0 |
| 1983 | 10 | 0 |
| 1984 | 13 | 0 |
| 1985 | 19 | 0 |
| 1986 | 11 | 0 |
| 1987 | 20 | 0 |
| 1988 | 11 | 0 |
| 1989 | 11 | 0 |
| 1990 | 14 | 0 |
| 1991 | 12 | 0 |
| 1992 | 11 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 7 | 0 |
| 1998 | 10 | 0 |
| 1999 | 3 | 0 |
| 2000 | 10 | 0 |
| 2001 | 11 | 9 |
| 2002 | 22 | 11 |
| 2003 | 9 | 11 |
| 2004 | 10 | 16 |
| 2005 | 15 | 29 |
| 2006 | 17 | 40 |
| 2007 | 15 | 37 |
| 2008 | 24 | 54 |
| 2009 | 24 | 58 |
| 2010 | 27 | 55 |
| 2011 | 39 | 50 |
| 2012 | 62 | 58 |
| 2013 | 57 | 99 |
| 2014 | 80 | 129 |
| 2015 | 75 | 126 |
| 2016 | 73 | 185 |
| 2017 | 108 | 160 |
| 2018 | 177 | 231 |
| 2019 | 216 | 187 |
| 2020 | 220 | 172 |
| 2021 | 166 | 137 |
| 2022 | 187 | 140 |
| 2023 | 157 | 115 |
| 2024 | 129 | 108 |
| 2025 | 135 | 102 |
| 2026 | 72 | 74 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Deaerator impeller rotor with gear rotor6 Oct 2026US 12,753,708 B2Pratt & Whitney Canada Corp.
- Breather system for aircraft engine6 Oct 2026US 12,753,709 B1Pratt & Whitney Canada Corp.
- Lubrication system for a turbine engine29 Sep 2026US 12,747,676 B2General Electric Company
- Integrated in-line emergency lube pump assembly for planetary gearbox configurations29 Sep 2026US 12,747,677 B2GE Avio S. r. l.
- Gearbox assembly having a segmented scavenge gutter for a turbine engine22 Sep 2026US 12,742,496 B2General Electric Company
- Reinforcement assembly for gas turbine bearing housing8 Oct 2026US 2026/0309049 A1
- Aircraft engine with lubricant system having windmilling configuration8 Oct 2026US 2026/0309050 A1Pratt & Whitney Canada Corp.
- Aircraft engine with lubricant system having windmilling configuration8 Oct 2026US 2026/0309051 A1Pratt & Whitney Canada Corp.
- Maintainable design for bearing compartment service line incorporating a grooved end8 Oct 2026US 2026/0309052 A1Rtx Corporation
- Axial pump with reduced clearance feature1 Oct 2026US 2026/0298345 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- Flexible shaft for gas turbine engine391US 7,926,260 B2United Technologies Corporation · 2011
- Fuel and oil heat management system for a gas turbine engine337US 4,696,156 AUnited Technologies Corporation · 1987
- Aircraft engine with inter-turbine engine frame supported counter rotating low pressure turbine rotors329US 6,619,030 B1General Electric Company · 2003
- Rotary pump with hydrodynamically suspended impeller327US 6,227,797 B1VentrAssist Pty Ltd and University of Technology · 2001
- Emergency oil/mist system289US 4,284,174 AAvco Corporation · 1981