F01D 21/00
Shutting-down of machines or engines
Official title: Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
F01D21/00 (Shutting-down of machines or engines) appears on 3,588 US grants and 3,865 published applications in this corpus.
Search patents in F01D- Granted patents
- 3,588
- Published applications
- 3,865
- Assignees
- 560
- Inventors
- 7,022
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 21 | 0 |
| 1978 | 15 | 0 |
| 1979 | 6 | 0 |
| 1980 | 16 | 0 |
| 1981 | 10 | 0 |
| 1982 | 8 | 0 |
| 1983 | 12 | 0 |
| 1984 | 14 | 0 |
| 1985 | 24 | 0 |
| 1986 | 12 | 0 |
| 1987 | 16 | 0 |
| 1988 | 10 | 0 |
| 1989 | 14 | 0 |
| 1990 | 14 | 0 |
| 1991 | 7 | 0 |
| 1992 | 16 | 0 |
| 1993 | 18 | 0 |
| 1994 | 12 | 0 |
| 1995 | 25 | 0 |
| 1996 | 14 | 0 |
| 1997 | 9 | 0 |
| 1998 | 16 | 0 |
| 1999 | 13 | 0 |
| 2000 | 24 | 0 |
| 2001 | 26 | 8 |
| 2002 | 32 | 17 |
| 2003 | 32 | 43 |
| 2004 | 33 | 40 |
| 2005 | 34 | 66 |
| 2006 | 42 | 64 |
| 2007 | 32 | 65 |
| 2008 | 57 | 86 |
| 2009 | 53 | 89 |
| 2010 | 53 | 113 |
| 2011 | 68 | 91 |
| 2012 | 83 | 123 |
| 2013 | 100 | 132 |
| 2014 | 109 | 148 |
| 2015 | 122 | 225 |
| 2016 | 124 | 281 |
| 2017 | 194 | 255 |
| 2018 | 237 | 330 |
| 2019 | 280 | 302 |
| 2020 | 294 | 281 |
| 2021 | 231 | 207 |
| 2022 | 235 | 207 |
| 2023 | 227 | 176 |
| 2024 | 216 | 188 |
| 2025 | 201 | 188 |
| 2026 | 110 | 140 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01D 21/003Arrangements for testing or measuring1,848
- F01D 21/04Responsive to undesired position of rotor relative to stator or to breaking-off1,180
- F01D 21/14Responsive to other specific conditions367
- F01D 21/12Responsive to temperature233
- F01D 21/02Shutting-down responsive to overspeed185
- F01D 21/16Trip gear77
- F01D 21/006Arrangements of brakes75
- F01D 21/10Responsive to unwanted deposits on blades, in working-fluid conduits or the like66
All 9 subgroupsShow fewer
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