F01D 25/26
Double casings
Official title: Double casings; Measures against temperature strain in casings
F01D25/26 (Double casings) appears on 666 US grants and 668 published applications in this corpus.
Search patents in F01D- Granted patents
- 666
- Published applications
- 668
- Assignees
- 155
- Inventors
- 1,599
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 6 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 7 | 0 |
| 1989 | 6 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 10 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 14 | 4 |
| 2002 | 15 | 7 |
| 2003 | 8 | 7 |
| 2004 | 8 | 11 |
| 2005 | 6 | 9 |
| 2006 | 3 | 10 |
| 2007 | 8 | 10 |
| 2008 | 6 | 11 |
| 2009 | 7 | 11 |
| 2010 | 7 | 22 |
| 2011 | 5 | 33 |
| 2012 | 17 | 18 |
| 2013 | 19 | 32 |
| 2014 | 23 | 36 |
| 2015 | 22 | 38 |
| 2016 | 21 | 68 |
| 2017 | 34 | 41 |
| 2018 | 43 | 42 |
| 2019 | 54 | 60 |
| 2020 | 62 | 53 |
| 2021 | 58 | 47 |
| 2022 | 47 | 28 |
| 2023 | 39 | 20 |
| 2024 | 26 | 22 |
| 2025 | 18 | 19 |
| 2026 | 13 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Monitoring and control device for rotating machine, rotating machine equipment, monitoring and control method for rotating machine, and monitoring and control program for rotating machine18 Aug 2026US 12,709,990 B2Mitsubishi Heavy Industries, Ltd.
- Turbine with a shroud ring around rotor blades and method of limiting leakage of working fluid in a turbine7 Jul 2026US 12,674,399 B2Nuovo Pignone Tecnologie Srl
- Deformation adjustment method for lower half inner casing2 Jun 2026US 12,644,395 B2Mitsubishi Heavy Industries, Ltd.
- Containment ring for gas turbine engine26 May 2026US 12,637,959 B2Pratt & Whitney Canada Corp.
- Soundproof wall and steam turbine19 May 2026US 12,631,127 B2Mitsubishi Heavy Industries, Ltd.
- Expander and thermodynamic cycle using the expander17 Sep 2026US 2026/0275871 A1Nuovo Pignone Tecnologie Srl
- Passenger compartment and method for manufacturing passenger compartment13 Aug 2026US 2026/0235047 A1Mitsubishi Heavy Industries Compressor Corporation
- Inner shroud sector for an aircraft turbomachine6 Aug 2026US 2026/0226851 A1Safran Aircraft Engines
- Turbine having guide baffle and gas turbine including same11 Jun 2026US 2026/0160184 A1Doosan Enerbility Co., Ltd.
- Fastener assembly for a gas turbine engine21 May 2026US 2026/0139612 A1Rtx Corporation
Most cited
By later US patents
- Method and system for controlling distortion of turbine case due to thermal variations99US 6,691,019 B2General Electric Company · 2004
- Casing distortion control for rotating machinery62US 5,605,438 AGeneral Electric Company · 1997
- Turbine casing57US 6,478,534 B2Siemnes Aktiengesellschaft · 2002
- Method and apparatus for cooling hot gas casings54US 4,339,925 ABBC Brown, Boveri & Company, Limited · 1982
- Gas turbine engine case for clearance control49US 8,434,997 B2United Technologies Corporation · 2013