F04D 29/286
Multi-stage rotors
Official title: {multi-stage rotors}
F04D29/286 (Multi-stage rotors) appears on 96 US grants and 133 published applications in this corpus.
Search patents in F04D- Granted patents
- 96
- Published applications
- 133
- Assignees
- 72
- Inventors
- 310
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 1 | 2 |
| 2011 | 1 | 2 |
| 2012 | 1 | 3 |
| 2013 | 2 | 1 |
| 2014 | 1 | 2 |
| 2015 | 3 | 5 |
| 2016 | 1 | 13 |
| 2017 | 0 | 10 |
| 2018 | 5 | 17 |
| 2019 | 10 | 12 |
| 2020 | 16 | 2 |
| 2021 | 6 | 10 |
| 2022 | 7 | 7 |
| 2023 | 6 | 10 |
| 2024 | 9 | 9 |
| 2025 | 10 | 12 |
| 2026 | 1 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Turbo compressor8 Sep 2026US 12,729,691 B2LG Electronics Inc.
- Coupling joints to interconnect and transmit rotational torque between adjacent impeller bodies in a turbomachine30 Dec 2025US 12,510,094 B1Siemens Energy Global GmbH & Co. KG
- Compressor with bypass for interstage passage23 Dec 2025US 12,504,021 B2
- Method for efficient part load compressor operation4 Nov 2025US 12,460,651 B2Next Gen Compression LLC
- Electric turbo compressor21 Oct 2025US 12,448,979 B2Kabushiki Kaisha Toyota Jidoshokki
- Two-stage radial compressor with compensating bodies for compensating a change in length occurring upon a change in temperature1 Oct 2026US 2026/0298261 A1ebm-papst Mulfingen GmbH & Co. KGaA & Co. KG
- Impeller17 Sep 2026US 2026/0276000 A1Honeywell International Inc.
- Turbocharger for road vehicles6 Aug 2026US 2026/0226912 A1Ferrari S.P. A.
- Compressor for hvac&r system23 Jul 2026US 2026/0210595 A1Tyco Fire & Security GmbH
- Ported shroud on radially nested dual state compressor28 May 2026US 2026/0146613 A1Honeywell International Inc.
Most cited
By later US patents
- Dual-pressure blower for positive air pressure device333US 6,349,724 B1Compumedics Sleep Pty Ltd · 2002
- Gas separation with split stream centrifugal turbomachinery76US 6,398,853 B1Quest Air Gases Inc. · 2002
- Centrifugal compressor assembly and method48US 7,856,834 B2Trane International Inc. · 2010
- Low speed high pressure ratio turbocharger45US 6,062,028 AAllied-Signal Inc. · 2000
- By-pass jet engine with centrifugal flow compressor34US 3,937,013 AGeneral Motors Corporation · 1976