F01D
Non-positive displacement machines or engines
Official title: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D)
F01D (Non-positive displacement machines or engines) appears on 42,406 US grants and 42,931 published applications in this corpus.
Search patents in F01D- Granted patents
- 42,406
- Published applications
- 42,931
- Assignees
- 3,581
- Inventors
- 44,616
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 232 | 0 |
| 1977 | 223 | 0 |
| 1978 | 185 | 0 |
| 1979 | 142 | 0 |
| 1980 | 196 | 0 |
| 1981 | 224 | 0 |
| 1982 | 161 | 0 |
| 1983 | 187 | 0 |
| 1984 | 225 | 0 |
| 1985 | 248 | 0 |
| 1986 | 195 | 0 |
| 1987 | 271 | 0 |
| 1988 | 250 | 0 |
| 1989 | 312 | 0 |
| 1990 | 200 | 0 |
| 1991 | 254 | 0 |
| 1992 | 320 | 0 |
| 1993 | 338 | 0 |
| 1994 | 281 | 0 |
| 1995 | 255 | 0 |
| 1996 | 292 | 0 |
| 1997 | 248 | 0 |
| 1998 | 312 | 0 |
| 1999 | 298 | 0 |
| 2000 | 415 | 0 |
| 2001 | 511 | 122 |
| 2002 | 601 | 450 |
| 2003 | 564 | 580 |
| 2004 | 521 | 755 |
| 2005 | 536 | 962 |
| 2006 | 609 | 893 |
| 2007 | 546 | 1005 |
| 2008 | 537 | 1097 |
| 2009 | 635 | 1319 |
| 2010 | 780 | 1575 |
| 2011 | 888 | 1452 |
| 2012 | 1312 | 1620 |
| 2013 | 1234 | 2375 |
| 2014 | 1485 | 2302 |
| 2015 | 1579 | 2522 |
| 2016 | 1626 | 3355 |
| 2017 | 2070 | 2895 |
| 2018 | 2566 | 3052 |
| 2019 | 3189 | 2628 |
| 2020 | 3193 | 2742 |
| 2021 | 2557 | 1971 |
| 2022 | 2335 | 1641 |
| 2023 | 1930 | 1565 |
| 2024 | 1764 | 1543 |
| 2025 | 1633 | 1383 |
| 2026 | 941 | 1127 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F01D 5/00Blades19,274
- F01D 25/00Component parts, details, or accessories, not provided for in, or of interest15,874
- F01D 11/00Preventing or minimising internal leakage of working-fluid7,846
- F01D 9/00Stators7,659
- F01D 17/00Regulating or controlling by varying flow4,653
- F01D 21/00Shutting-down of machines or engines3,588
- F01D 15/00Adaptations of machines or engines for special use2,723
- F01D 1/00Non-positive-displacement machines or engines1,046
All 13 main groupsShow fewer
- F01D 19/00Starting of machines or engines501
- F01D 7/00Rotors with blades adjustable in operation458
- F01D 3/00Machines or engines with axial-thrust balancing effected by working-fluid225
- F01D 13/00Combinations of two or more machines or engines189
- F01D 23/00Non-positive-displacement machines or engines with movement other than pure rotation9
Recent patents
- Systems and methods of servicing equipment6 Oct 2026US 12,752,747 B2General Electric Company
- Ceramic matrix composite article manufacturing6 Oct 2026US 12,753,125 B2General Electric Company
- Fluid propulsion system6 Oct 2026US 12,753,694 B23Silk, Inc.
- Airfoils for gas turbine engines6 Oct 2026US 12,753,695 B2General Electric Company
- Turbine engine with a blade assembly having a set of cooling conduits6 Oct 2026US 12,753,696 B2General Electric Company
- Method for attaching a metal reinforcement on a leading edge of a turbomachine blade8 Oct 2026US 2026/0307338 A1Safran Aerospace Composites
- Variable-pitch assembly for a turbomachine fan8 Oct 2026US 2026/0307778 A1Safran Aircraft Engines
- Environmental barrier coating8 Oct 2026US 2026/0308075 A1Rtx Corporation
- Disc of rotating machine, and rotating machine8 Oct 2026US 2026/0309030 A1Mitsubishi Heavy Industries, Ltd.
- Turbine engine blade blank obtained by metal casting and method for manufacturing such a blank8 Oct 2026US 2026/0309031 A1Safran Aircraft Engines
Most cited
By later US patents
- Thermal seal for a gas turbine spacer disc1,527US 5,080,556 AGeneral Electric Company · 1992
- Grinding apparatus for blending defects on turbine blades and associated method of use1,035US 6,899,593 B12005
- Arrangement for controlling fluid jets injected into a fluid stream1,018US 7,976,213 B2United Technologies Corporation · 2011
- Forming structures from CAD solid models580US 6,391,251 B1Optomec Design Company · 2002
- Coupling system for a planetary gear train525US 5,433,674 AUnited Technologies Corporation · 1995