F01D 11/00
Preventing or minimising internal leakage of working-fluid
Official title: Preventing or minimising internal leakage of working-fluid, e.g. between stages (sealings in general F16J {; sealing arrangements for transition ducts of combustor cans F01D9/023})
F01D11/00 (Preventing or minimising internal leakage of working-fluid) appears on 7,846 US grants and 7,726 published applications in this corpus.
Search patents in F01D- Granted patents
- 7,846
- Published applications
- 7,726
- Assignees
- 640
- Inventors
- 9,996
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 32 | 0 |
| 1977 | 25 | 0 |
| 1978 | 20 | 0 |
| 1979 | 20 | 0 |
| 1980 | 30 | 0 |
| 1981 | 43 | 0 |
| 1982 | 38 | 0 |
| 1983 | 39 | 0 |
| 1984 | 43 | 0 |
| 1985 | 53 | 0 |
| 1986 | 27 | 0 |
| 1987 | 50 | 0 |
| 1988 | 45 | 0 |
| 1989 | 46 | 0 |
| 1990 | 26 | 0 |
| 1991 | 56 | 0 |
| 1992 | 58 | 0 |
| 1993 | 67 | 0 |
| 1994 | 58 | 0 |
| 1995 | 40 | 0 |
| 1996 | 43 | 0 |
| 1997 | 51 | 0 |
| 1998 | 60 | 0 |
| 1999 | 61 | 0 |
| 2000 | 71 | 0 |
| 2001 | 90 | 19 |
| 2002 | 87 | 61 |
| 2003 | 122 | 105 |
| 2004 | 94 | 144 |
| 2005 | 97 | 157 |
| 2006 | 104 | 136 |
| 2007 | 103 | 178 |
| 2008 | 75 | 186 |
| 2009 | 104 | 217 |
| 2010 | 124 | 251 |
| 2011 | 144 | 237 |
| 2012 | 250 | 302 |
| 2013 | 203 | 408 |
| 2014 | 255 | 377 |
| 2015 | 274 | 450 |
| 2016 | 259 | 777 |
| 2017 | 374 | 566 |
| 2018 | 526 | 538 |
| 2019 | 695 | 477 |
| 2020 | 671 | 547 |
| 2021 | 565 | 387 |
| 2022 | 475 | 290 |
| 2023 | 327 | 262 |
| 2024 | 286 | 254 |
| 2025 | 291 | 197 |
| 2026 | 149 | 203 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01D 11/08Preventing or minimising internal leakage of working-fluid: for sealing space between rotor3,793
- F01D 11/005Sealing means between non relatively rotating elements2,408
- F01D 11/02Preventing or minimising internal leakage of working-fluid: by non-contact sealings1,510
- F01D 11/001Preventing or minimising internal leakage of working-fluid: for sealing space between stator1,200
- F01D 11/003Preventing or minimising internal leakage of working-fluid: by packing rings895
Recent patents
- Cooling features for a component of a gas turbine engine6 Oct 2026US 12,753,697 B2Rtx Corporation
- Method for producing an abradable coating, abradable coating and coated part6 Oct 2026US 12,753,704 B2Centre National De La Recherche Scientifique
- Gas turbine engines having self-cooling seals and methods of operating the same29 Sep 2026US 12,747,672 B1Honeywell Aerospace US LLC
- Clearance control system for blade outer air seal29 Sep 2026US 12,747,673 B2Rtx Corporation
- Apparatus and method of purging gas turbine exhaust trough to reduce hot flow leakage29 Sep 2026US 12,747,680 B2General Electric Company
- Hot gas path segment with seal slot cooling groove8 Oct 2026US 2026/0309040 A1GE Vernova Infrastructure Technology LLC
- Turbine Engine Rotor Seal and Installation Method8 Oct 2026US 2026/0309041 A1Rtx Corporation
- Turbine engine component with a cooling aperture8 Oct 2026US 2026/0309042 A1General Electric Company
- Axial pump with integrated seal8 Oct 2026US 2026/0309043 A1Pratt & Whitney Canada Corp.
- Ceramic matrix composite seal repair8 Oct 2026US 2026/0309044 A1Rtx Corporation
Most cited
By later US patents
- Thermal seal for a gas turbine spacer disc1,527US 5,080,556 AGeneral Electric Company · 1992
- Aircraft engine with inter-turbine engine frame supported counter rotating low pressure turbine rotors329US 6,619,030 B1General Electric Company · 2003
- Fluid bearing face seal for gas turbine engines137US 5,174,584 AGeneral Electric Company · 1992
- Segmented abradable ceramic coating133US 6,102,656 AUnited Technologies Corporation · 2000
- Low-pressure turbine shroud124US 5,188,507 AGeneral Electric Company · 1993