F01D 11/02
Preventing or minimising internal leakage of working-fluid: by non-contact sealings
Official title: by non-contact sealings, e.g. of labyrinth type (for sealing space between rotor blade tips and stator F01D11/08)
F01D11/02 (Preventing or minimising internal leakage of working-fluid: by non-contact sealings) appears on 1,510 US grants and 1,484 published applications in this corpus.
Search patents in F01D- Granted patents
- 1,510
- Published applications
- 1,484
- Assignees
- 275
- Inventors
- 2,761
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 7 | 0 |
| 1981 | 6 | 0 |
| 1982 | 6 | 0 |
| 1983 | 10 | 0 |
| 1984 | 10 | 0 |
| 1985 | 12 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 8 | 0 |
| 1989 | 5 | 0 |
| 1990 | 8 | 0 |
| 1991 | 13 | 0 |
| 1992 | 8 | 0 |
| 1993 | 10 | 0 |
| 1994 | 11 | 0 |
| 1995 | 7 | 0 |
| 1996 | 7 | 0 |
| 1997 | 9 | 0 |
| 1998 | 13 | 0 |
| 1999 | 12 | 0 |
| 2000 | 17 | 0 |
| 2001 | 23 | 3 |
| 2002 | 11 | 10 |
| 2003 | 23 | 20 |
| 2004 | 24 | 33 |
| 2005 | 26 | 34 |
| 2006 | 15 | 29 |
| 2007 | 22 | 37 |
| 2008 | 18 | 48 |
| 2009 | 20 | 41 |
| 2010 | 25 | 44 |
| 2011 | 33 | 46 |
| 2012 | 57 | 61 |
| 2013 | 29 | 89 |
| 2014 | 41 | 82 |
| 2015 | 62 | 78 |
| 2016 | 62 | 109 |
| 2017 | 74 | 98 |
| 2018 | 89 | 109 |
| 2019 | 131 | 98 |
| 2020 | 115 | 95 |
| 2021 | 106 | 72 |
| 2022 | 91 | 51 |
| 2023 | 53 | 55 |
| 2024 | 56 | 65 |
| 2025 | 71 | 45 |
| 2026 | 24 | 32 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Turbine assembly of an axial-flow turbine and axial-flow turbine22 Sep 2026US 12,742,397 B2Doosan šKoda Power A.S.
- Air leakage restrictor arrangement for an aircraft powerplant25 Aug 2026US 12,716,360 B2Pratt & Whitney Canada Corp.
- Aspirating face seal assembly for a rotary machine11 Aug 2026US 12,704,074 B2General Electric Company
- Gas turbine engine defining a rotor cavity11 Aug 2026US 12,704,095 B2General Electric Company
- Turbine engine with a rotating blade having a fin21 Jul 2026US 12,687,118 B2General Electric Company
- Axial pump with reduced clearance feature1 Oct 2026US 2026/0298345 A1Pratt & Whitney Canada Corp.
- Hydrostatic annular seal10 Sep 2026US 2026/0266188 A1Safran Aircraft Engines
- Stator assembly for an aircraft turbine engine10 Sep 2026US 2026/0266189 A1Safran Aircraft Engines
- Stator assembly for an aircraft turbine engine10 Sep 2026US 2026/0266190 A1Safran Aircraft Engines
- Floating seal assembly for a turbine engine10 Sep 2026US 2026/0266191 A1General Electric Company
Most cited
By later US patents
- Brush seal107US 4,756,536 AROLLS-ROYCE plc · 1988
- Wear resistant, abrasive laser-engraved ceramic or metallic carbide surfaces for rotary labyrinth seal members89US 4,884,820 AUnion Carbide Corporation · 1989
- Stator vane asssembly for an axial flow rotary machine86US 4,897,021 AUnited Technologies Corporation · 1990
- Noncontacting finger seal with hydrodynamic foot portion84US 5,755,445 AAlliedSignal Inc. · 1998
- Woven seal and hybrid cloth-brush seals for turbine applications79US 5,474,306 AGeneral Electric Company · 1995