F04D 27/02
Surge control
Official title: Surge control {(surge detection F04D27/001)}
F04D27/02 (Surge control) appears on 1,993 US grants and 1,881 published applications in this corpus.
Search patents in F04D- Granted patents
- 1,993
- Published applications
- 1,881
- Assignees
- 580
- Inventors
- 3,833
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 5 | 0 |
| 1978 | 10 | 0 |
| 1979 | 14 | 0 |
| 1980 | 13 | 0 |
| 1981 | 13 | 0 |
| 1982 | 7 | 0 |
| 1983 | 13 | 0 |
| 1984 | 14 | 0 |
| 1985 | 15 | 0 |
| 1986 | 17 | 0 |
| 1987 | 18 | 0 |
| 1988 | 7 | 0 |
| 1989 | 17 | 0 |
| 1990 | 24 | 0 |
| 1991 | 18 | 0 |
| 1992 | 18 | 0 |
| 1993 | 19 | 0 |
| 1994 | 23 | 0 |
| 1995 | 13 | 0 |
| 1996 | 16 | 0 |
| 1997 | 12 | 0 |
| 1998 | 23 | 0 |
| 1999 | 21 | 0 |
| 2000 | 26 | 0 |
| 2001 | 27 | 6 |
| 2002 | 36 | 41 |
| 2003 | 34 | 32 |
| 2004 | 36 | 32 |
| 2005 | 18 | 38 |
| 2006 | 34 | 37 |
| 2007 | 22 | 48 |
| 2008 | 22 | 61 |
| 2009 | 30 | 68 |
| 2010 | 35 | 67 |
| 2011 | 35 | 66 |
| 2012 | 66 | 74 |
| 2013 | 57 | 107 |
| 2014 | 57 | 96 |
| 2015 | 65 | 86 |
| 2016 | 68 | 109 |
| 2017 | 89 | 131 |
| 2018 | 84 | 100 |
| 2019 | 140 | 107 |
| 2020 | 120 | 123 |
| 2021 | 99 | 103 |
| 2022 | 105 | 85 |
| 2023 | 99 | 96 |
| 2024 | 100 | 73 |
| 2025 | 83 | 59 |
| 2026 | 36 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F04D 27/0207By bleeding, bypassing or recycling fluids940
- F04D 27/0246By varying geometry within the pumps391
- F04D 27/0261By varying driving speed314
- F04D 27/0292Stop safety or alarm devices211
- F04D 27/0253By throttling153
- F04D 27/0269By changing flow path between different stages or between a plurality of100
- F04D 27/0284Conjoint control of two or more different functions94
- F04D 27/0276By influencing fluid temperature25
Recent patents
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- Throttle valve for coolant circulation system18 Aug 2026US 12,710,056 B2Ingersoll-Rand Industrial U.S., Inc.
- Aircraft component additively having thermally adaptive material and a thermoelectric junction4 Aug 2026US 12,698,783 B2Hamilton Sundstrand Corporation
- Centrifugal compressor with energy recovery from a recycle line7 Jul 2026US 12,674,460 B2Nuovo Pignone Tecnologie Srl
- Variable bleed valve assemblies8 Oct 2026US 2026/0309077 A1General Electric Company
- Aero-acoustically dampened bleed valve24 Sep 2026US 2026/0286904 A1General Electric Company
- Centrifugal compressor and turbocharger13 Aug 2026US 2026/0235140 A1Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- Anti-surge control in a centrifugal compressor working with co2 in supercritical conditions based on flow measurement at discharge6 Aug 2026US 2026/0226906 A1Nuovo Pignone Tecnologie Srl
- Ported shroud centrifugal compressor6 Aug 2026US 2026/0226917 A1Ohio State Innovation Foundation
Most cited
By later US patents
- Compressor stall and surge control using airflow asymmetry measurement414US 5,915,917 AUnited Technologies Corporation · 1999
- Respirator system for use with a hood or face mask265US 4,899,740 AE. D. Bullard Company · 1990
- Surge detector for turbine engines246US 3,935,558 AUnited Technologies Corporation · 1976
- Apparatus and method for regulating a pressure in a chamber203US 5,944,049 AAPPLIED Materials.Inc. · 1999
- Variable geometry guide vane for a gas turbine engine199US 7,632,064 B2United Technologies Corporation · 2009