F01D 1/00
Non-positive-displacement machines or engines
Official title: Non-positive-displacement machines or engines, e.g. steam turbines (wit working-fluid flows in opposite axial directions for balancing axial thrust F01D3/02; with other than pure rotation F01D23/00; turbines characterised by their use in special steam systems, cycles, or processes, regulating devices therefor F01K)
F01D1/00 (Non-positive-displacement machines or engines) appears on 1,046 US grants and 1,041 published applications in this corpus.
Search patents in F01D- Granted patents
- 1,046
- Published applications
- 1,041
- Assignees
- 401
- Inventors
- 1,906
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 15 | 0 |
| 1978 | 4 | 0 |
| 1979 | 7 | 0 |
| 1980 | 15 | 0 |
| 1981 | 20 | 0 |
| 1982 | 6 | 0 |
| 1983 | 14 | 0 |
| 1984 | 13 | 0 |
| 1985 | 9 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 9 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 2 | 0 |
| 1992 | 11 | 0 |
| 1993 | 14 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 14 | 0 |
| 1997 | 9 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 11 | 0 |
| 2001 | 24 | 5 |
| 2002 | 25 | 21 |
| 2003 | 16 | 19 |
| 2004 | 27 | 33 |
| 2005 | 14 | 29 |
| 2006 | 17 | 29 |
| 2007 | 16 | 25 |
| 2008 | 15 | 15 |
| 2009 | 11 | 28 |
| 2010 | 15 | 41 |
| 2011 | 12 | 35 |
| 2012 | 23 | 36 |
| 2013 | 26 | 86 |
| 2014 | 36 | 64 |
| 2015 | 55 | 98 |
| 2016 | 30 | 65 |
| 2017 | 60 | 40 |
| 2018 | 60 | 67 |
| 2019 | 49 | 56 |
| 2020 | 63 | 58 |
| 2021 | 55 | 56 |
| 2022 | 53 | 39 |
| 2023 | 37 | 29 |
| 2024 | 41 | 29 |
| 2025 | 27 | 17 |
| 2026 | 10 | 21 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01D 1/02Non-positive-displacement machines or engines: with stationary working-fluid guiding means and bladed or474
- F01D 1/34Non-positive-displacement machines or engines: characterised by non-bladed rotor195
- F01D 1/24Non-positive-displacement machines or engines: characterised by counter-rotating rotors subjected to same working173
- F01D 1/32Non-positive-displacement machines or engines: with pressure velocity transformation exclusively in rotor151
- F01D 1/18Without stationary working-fluid guiding means95
- F01D 1/30Non-positive-displacement machines or engines: characterised by having a single rotor operable in22
Recent patents
- Rotary assembly1 Sep 2026US 12,723,519 B2ROLLS-ROYCE plc
- Fuel vaporization power turbine engine, method of assembly and method of use14 Jul 2026US 12,680,453 B1General Electric Company
- Radial turbine assembly with ceramic matrix composite airfoils having circumferential dovetail retention16 Jun 2026US 12,655,770 B2Rolls-Royce North American Technologies Inc.
- Control system for open rotor propulsion system with one or more sensors9 Jun 2026US 12,650,085 B1Rtx Corporation
- Aeronautical propulsion system comprising an optimized fan section21 Apr 2026US 12,607,124 B2Safran Aircraft Engines
- Aeronautical propulsion system13 Aug 2026US 2026/0233847 A1Safran Aircraft Engines
- Gas turbine engine13 Aug 2026US 2026/0235038 A1General Electric Company
- Aeronautical propulsion system13 Aug 2026US 2026/0240026 A1Safran Aircraft Engines
- Lubricant system for aircraft6 Aug 2026US 2026/0227029 A1Pratt & Whitney Canada Corp.
- Steam turbine23 Jul 2026US 2026/0210251 A1Mitsubishi Heavy Ind. Compressor Corp.
Most cited
By later US patents
- Viscous drag impeller components incorporated into pumps, turbines and transmissions164US 6,375,412 B12002
- Natural gas turbine generator128US 7,683,499 B2S & W Holding, Inc. · 2010
- Aircraft gas turbine engine having variable torque split counter rotating low pressure turbines and booster aft of counter rotating fans115US 6,763,654 B2General Electric Company · 2004
- Turbojet with contrarotating wheels108US 4,463,553 AOffice National D’Etudes Et De Recherches AéRospatiales · 1984
- Hydrogen-rich fuel, closed-loop cooled, and reheat enhanced gas turbine powerplants106US 5,590,518 ACalifornia Energy Commission · 1997