F04D 29/442
Rotating diffusers
Official title: {rotating diffusers}
F04D29/442 (Rotating diffusers) appears on 41 US grants and 37 published applications in this corpus.
Search patents in F04D- Granted patents
- 41
- Published applications
- 37
- Assignees
- 36
- Inventors
- 90
- Latest grant
- 24 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 2 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 2 | 2 |
| 2016 | 1 | 4 |
| 2017 | 0 | 3 |
| 2018 | 2 | 5 |
| 2019 | 4 | 2 |
| 2020 | 5 | 3 |
| 2021 | 1 | 1 |
| 2022 | 5 | 5 |
| 2023 | 5 | 3 |
| 2024 | 2 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- System and method for operation of variable geometry diffuser as check valve24 Jun 2025US 12,339,047 B2Tyco Fire & Security GmbH
- Axially nested compressors29 Oct 2024US 12,129,859 B1Honeywell International Inc.
- Variable geometry shrouded compressor/blower rotor design30 Apr 2024US 11,971,050 B2Hamilton Sundstrand Corporation
- Blowing device and combustion device including same24 Oct 2023US 11,795,966 B2Noritz Corporation
- Straddled vehicle4 Jul 2023US 11,692,558 B2Yamaha Hatsudoki Kabushiki Kaisha
- System and method for operation of variable geometry diffuser as check valve16 Oct 2025US 2025/0321034 A1Tyco Fire & Security GmbH
- Variable geometry shrouded compressor/blower rotor design28 Dec 2023US 2023/0417256 A1Hamilton Sundstrand Corporation
- System and method for operation of variable geometry diffuser as check valve11 May 2023US 2023/0147950 A1Johnson Controls Tyco IP Holdings LLP
- Centrifugal compressor16 Mar 2023US 2023/0079172 A1ROLLS-ROYCE plc
- Straddled vehicle30 Jun 2022US 2022/0205454 A1Yamaha Hatsudoki Kabushiki Kaisha
Most cited
By later US patents
- Medical ventilator268US 6,543,449 B1Respironics, Inc. · 2003
- Rotating turbine stator27US 4,455,121 AAvco Corporation · 1984
- Drag reduction system in shrouded turbo machine24US 3,966,351 A1976
- Apparatus for the dynamic control of rotating stall and surge in turbo machines and the like17US 5,437,539 AMassachusetts Institute of Technology · 1995
- Diffuser including a rotary stage11US 3,941,501 AAvco Corporation · 1976