F01D 11/20
Actively adjusting tip-clearance
F01D11/20 (Actively adjusting tip-clearance) appears on 1,034 US grants and 1,038 published applications in this corpus.
Search patents in F01D- Granted patents
- 1,034
- Published applications
- 1,038
- Assignees
- 141
- Inventors
- 1,942
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 7 | 0 |
| 1982 | 7 | 0 |
| 1983 | 3 | 0 |
| 1984 | 7 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 3 | 0 |
| 1989 | 8 | 0 |
| 1990 | 4 | 0 |
| 1991 | 14 | 0 |
| 1992 | 14 | 0 |
| 1993 | 8 | 0 |
| 1994 | 7 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 5 | 0 |
| 1999 | 6 | 0 |
| 2000 | 13 | 0 |
| 2001 | 7 | 3 |
| 2002 | 8 | 14 |
| 2003 | 10 | 9 |
| 2004 | 13 | 8 |
| 2005 | 8 | 18 |
| 2006 | 12 | 16 |
| 2007 | 10 | 24 |
| 2008 | 14 | 28 |
| 2009 | 14 | 28 |
| 2010 | 25 | 47 |
| 2011 | 14 | 28 |
| 2012 | 36 | 27 |
| 2013 | 27 | 52 |
| 2014 | 36 | 64 |
| 2015 | 36 | 61 |
| 2016 | 44 | 95 |
| 2017 | 50 | 85 |
| 2018 | 60 | 71 |
| 2019 | 105 | 68 |
| 2020 | 83 | 61 |
| 2021 | 67 | 45 |
| 2022 | 56 | 38 |
| 2023 | 48 | 41 |
| 2024 | 40 | 37 |
| 2025 | 43 | 31 |
| 2026 | 25 | 39 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- CMC component with structure for directing cooling air flow22 Sep 2026US 12,742,398 B2Rtx Corporation
- Hot gas path segment with seal slot cooling groove1 Sep 2026US 12,723,518 B2GE Infrastructure Technology LLC
- Gas turbine engine with a rotor stage shroud11 Aug 2026US 12,704,081 B1Pratt & Whitney Canada Corp.
- Turbine engine tip clearance control utilizing electric machine23 Jun 2026US 12,662,946 B2Rtx Corporation
- Gas turbine engine having cooling systems19 May 2026US 12,631,122 B2General Electric Company
- Hot gas path segment with seal slot cooling groove8 Oct 2026US 2026/0309040 A1GE Vernova Infrastructure Technology LLC
- Turbine engine tip clearance control utilizing electric machine8 Oct 2026US 2026/0309046 A1Rtx Corporation
- Microwave Sensing Architecture for Clearance Control System24 Sep 2026US 2026/0286857 A1Rtx Corporation
- Operational Modes of Direct Drive Clearance Control System24 Sep 2026US 2026/0286858 A1Rtx Corporation
- Blade outer air seal (boas) assembly for a gas turbine engine17 Sep 2026US 2026/0275879 A1Rtx Corporation
Most cited
By later US patents
- Dual cooled shroud93US 5,993,150 AGeneral Electric Company · 1999
- Active clearance control system for a turbomachine92US 4,329,114 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1982
- Combined turbine stator cooling and turbine tip clearance control92US 5,048,288 AUnited Technologies Corporation · 1991
- Cooling system for a gas turbine engine compressor89US 5,297,386 ASociete Nationale d'Etude et de Construction de Moteurs D'Aviation "S.N.E.C.M A." · 1994
- Device for regulating turbine blade tip clearance81US 3,975,901 ASociete Nationale d'Etude et de Construction de Moteurs d'Aviation · 1976