F01D 11/003
Preventing or minimising internal leakage of working-fluid: by packing rings
Official title: {by packing rings; Mechanical seals}
F01D11/003 (Preventing or minimising internal leakage of working-fluid: by packing rings) appears on 895 US grants and 971 published applications in this corpus.
Search patents in F01D- Granted patents
- 895
- Published applications
- 971
- Assignees
- 157
- Inventors
- 1,585
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 1 |
| 2002 | 2 | 2 |
| 2003 | 7 | 3 |
| 2004 | 3 | 8 |
| 2005 | 6 | 10 |
| 2006 | 5 | 10 |
| 2007 | 7 | 9 |
| 2008 | 4 | 17 |
| 2009 | 5 | 16 |
| 2010 | 8 | 16 |
| 2011 | 8 | 19 |
| 2012 | 19 | 25 |
| 2013 | 11 | 47 |
| 2014 | 20 | 32 |
| 2015 | 27 | 65 |
| 2016 | 42 | 94 |
| 2017 | 45 | 81 |
| 2018 | 70 | 80 |
| 2019 | 95 | 72 |
| 2020 | 96 | 86 |
| 2021 | 96 | 59 |
| 2022 | 81 | 61 |
| 2023 | 56 | 45 |
| 2024 | 47 | 46 |
| 2025 | 58 | 39 |
| 2026 | 36 | 28 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Gas turbine engines having self-cooling seals and methods of operating the same29 Sep 2026US 12,747,672 B1Honeywell Aerospace US LLC
- Sealing ring25 Aug 2026US 12,716,361 B2Industria De Turbo Propulsores, S.A.U.
- Metal plated additively manufactured plastic ACM seal plates with internal thermally adaptive structure18 Aug 2026US 12,709,062 B2Hamilton Sundstrand Corporation
- Aspirating face seal assembly for a rotary machine11 Aug 2026US 12,704,074 B2General Electric Company
- Seal carrier tool systems and methods4 Aug 2026US 12,698,859 B1Scout Surface Solutions LLC
- Turbine Engine Rotor Seal and Installation Method8 Oct 2026US 2026/0309041 A1Rtx Corporation
- Laser Treatment of Piston Seal Rings10 Sep 2026US 2026/0266370 A1Rtx Corporation
- Wire retention for carbon seal and method of assembly13 Aug 2026US 2026/0235042 A1Rtx Corporation
- Boss with integral fire protection6 Aug 2026US 2026/0226849 A1Pratt & Whitney Canada Corp.
- Method for reducing adhesive damage due to loss of lubrication in aerospace piston rings23 Jul 2026US 2026/0210257 A1Rtx Corporation
Most cited
By later US patents
- Fluid bearing face seal for gas turbine engines137US 5,174,584 AGeneral Electric Company · 1992
- Double padded finger seal59US 7,735,833 B2The University of Akron · 2010
- Seal assembly for an intershaft seal in a gas turbine engine53US 6,196,790 B1United Technologies Corporation · 2001
- Pressure enhanced self aligning seal51US 5,014,999 ACar-Graph, Inc. · 1991
- Low leakage finger seal46US 7,367,567 B2United Technologies Corporation · 2008