F04D 29/66
Combating cavitation, whirls, noise, vibration or the like
Official title: Combating cavitation, whirls, noise, vibration or the like (gas-flow silencers for machines or engines in general F01N); Balancing (surge control F04D27/02)
F04D29/66 (Combating cavitation, whirls, noise, vibration or the like) appears on 3,824 US grants and 4,125 published applications in this corpus.
Search patents in F04D- Granted patents
- 3,824
- Published applications
- 4,125
- Assignees
- 1,285
- Inventors
- 7,988
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 10 | 0 |
| 1978 | 10 | 0 |
| 1979 | 11 | 0 |
| 1980 | 11 | 0 |
| 1981 | 5 | 0 |
| 1982 | 7 | 0 |
| 1983 | 9 | 0 |
| 1984 | 10 | 0 |
| 1985 | 9 | 0 |
| 1986 | 9 | 0 |
| 1987 | 11 | 0 |
| 1988 | 13 | 0 |
| 1989 | 19 | 0 |
| 1990 | 21 | 0 |
| 1991 | 22 | 0 |
| 1992 | 32 | 0 |
| 1993 | 28 | 0 |
| 1994 | 34 | 0 |
| 1995 | 35 | 0 |
| 1996 | 38 | 0 |
| 1997 | 35 | 0 |
| 1998 | 36 | 0 |
| 1999 | 31 | 0 |
| 2000 | 54 | 0 |
| 2001 | 56 | 21 |
| 2002 | 53 | 57 |
| 2003 | 69 | 58 |
| 2004 | 36 | 73 |
| 2005 | 49 | 98 |
| 2006 | 51 | 88 |
| 2007 | 48 | 93 |
| 2008 | 39 | 117 |
| 2009 | 48 | 114 |
| 2010 | 68 | 136 |
| 2011 | 69 | 121 |
| 2012 | 130 | 130 |
| 2013 | 86 | 159 |
| 2014 | 105 | 209 |
| 2015 | 129 | 236 |
| 2016 | 124 | 241 |
| 2017 | 197 | 248 |
| 2018 | 199 | 272 |
| 2019 | 290 | 313 |
| 2020 | 300 | 235 |
| 2021 | 230 | 208 |
| 2022 | 252 | 185 |
| 2023 | 185 | 192 |
| 2024 | 203 | 190 |
| 2025 | 195 | 186 |
| 2026 | 99 | 145 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- CPAP device6 Oct 2026US 12,752,066 B2Murata Manufacturing Co., Ltd.
- Axial fan assembly including an intermediate shroud6 Oct 2026US 12,753,773 B2Regal Beloit America, Inc.
- Side-channel machine (compressor, vacuum pump or blower) having an extraction duct in the stripper29 Sep 2026US 12,747,732 B2Gardner Denver Deutschland GmbH
- Torso aerator22 Sep 2026US 12,742,458 B2
- Compressor shroud with swept grooves22 Sep 2026US 12,742,459 B2Pratt & Whitney Canada Corp.
- Variable bleed valve assemblies8 Oct 2026US 2026/0309077 A1General Electric Company
- Noise reduction air inlet bypass recirculation structure of compressor8 Oct 2026US 2026/0309167 A1Harbin Engineering University
- Rotor for a turbomachine, turbomachine, and method for balancing a rotor of a turbomachine1 Oct 2026US 2026/0298094 A1Accelleron Switzerland Ltd.
- Techniques for Using Floodlight LEDs When Imaging Sensors Have an Insufficient Level of Detail for Identifying Hand Gestures, and Mixed-Reality Systems and Methods of Using These Techniques24 Sep 2026US 2026/0292120 A1Meta Platforms Technologies, LLC
- Gas turbine engine with acoustic spacing of the fan blades and outlet guide vanes17 Sep 2026US 2026/0275938 A1General Electric Company
Most cited
By later US patents
- Compact low noise efficient blower for CPAP devices351US 7,866,944 B2ResMed Motor Technologies Inc. · 2011
- Automatic pump protection system333US 4,913,625 AWestinghouse Electric Corp. · 1990
- Blower with bearing tube333US 8,636,479 B2ResMed Motor Technologies Inc. · 2014
- System for reducing noise in a hydraulic fracturing fleet263US 9,587,649 B2U.S. Well Services, LLC · 2017
- Motorized system integrated control and diagnostics using vibration, pressure, temperature, speed, and/or current analysis245US 7,539,549 B1Rockwell Automation Technologies, Inc. · 2009