F04D 27/0207
By bleeding, bypassing or recycling fluids
Official title: {by bleeding, bypassing or recycling fluids (influencing the boundary layer by an uncontrolled bleeding of the working fluid F04D29/681)}
F04D27/0207 (By bleeding, bypassing or recycling fluids) appears on 940 US grants and 843 published applications in this corpus.
Search patents in F04D- Granted patents
- 940
- Published applications
- 843
- Assignees
- 314
- Inventors
- 1,902
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 8 | 0 |
| 1980 | 7 | 0 |
| 1981 | 6 | 0 |
| 1982 | 4 | 0 |
| 1983 | 8 | 0 |
| 1984 | 7 | 0 |
| 1985 | 8 | 0 |
| 1986 | 7 | 0 |
| 1987 | 13 | 0 |
| 1988 | 4 | 0 |
| 1989 | 14 | 0 |
| 1990 | 16 | 0 |
| 1991 | 9 | 0 |
| 1992 | 7 | 0 |
| 1993 | 10 | 0 |
| 1994 | 11 | 0 |
| 1995 | 7 | 0 |
| 1996 | 6 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 7 | 0 |
| 2000 | 9 | 0 |
| 2001 | 11 | 4 |
| 2002 | 14 | 18 |
| 2003 | 16 | 12 |
| 2004 | 15 | 11 |
| 2005 | 8 | 18 |
| 2006 | 13 | 17 |
| 2007 | 10 | 17 |
| 2008 | 9 | 27 |
| 2009 | 15 | 28 |
| 2010 | 8 | 22 |
| 2011 | 13 | 34 |
| 2012 | 38 | 29 |
| 2013 | 18 | 43 |
| 2014 | 29 | 45 |
| 2015 | 33 | 38 |
| 2016 | 34 | 43 |
| 2017 | 44 | 61 |
| 2018 | 34 | 50 |
| 2019 | 65 | 53 |
| 2020 | 60 | 62 |
| 2021 | 50 | 39 |
| 2022 | 54 | 39 |
| 2023 | 52 | 48 |
| 2024 | 48 | 36 |
| 2025 | 37 | 30 |
| 2026 | 13 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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
- Methods and systems of compressor control with surge avoidance and response7 Jul 2026US 12,674,487 B2
- Control device that detects surging30 Jun 2026US 12,669,130 B2Mitsubishi Heavy Industries, Ltd.
- 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
- Gas turbine engine variable bleed pivotal flow splitter132US 5,279,109 AGeneral Electric Company · 1994
- Heat exchange system100US 4,546,605 AUnited Technologies Corporation · 1985
- Active clearance control system for a turbomachine92US 4,329,114 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1982
- Cooling system for a gas turbine engine compressor89US 5,297,386 ASociete Nationale d'Etude et de Construction de Moteurs D'Aviation "S.N.E.C.M A." · 1994
- Surge prevention control system for dynamic compressors87US 5,798,941 AWoodward Governor Company · 1998