B04C 5/02
Construction of inlets by which the vortex flow is generated
Official title: Construction of inlets by which the vortex flow is generated {, e.g. tangential admission, the fluid flow being forced to follow a downward path by spirally wound bulkheads, or with slightly downwardly-directed tangential admission}(fluid dynamics in general F15D)
B04C5/02 (Construction of inlets by which the vortex flow is generated) appears on 530 US grants and 486 published applications in this corpus.
Search patents in B04C- Granted patents
- 530
- Published applications
- 486
- Assignees
- 421
- Inventors
- 1,115
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 6 | 0 |
| 1978 | 7 | 0 |
| 1979 | 13 | 0 |
| 1980 | 8 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 6 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 6 | 0 |
| 1987 | 8 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 13 | 0 |
| 1994 | 7 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 6 | 0 |
| 1998 | 7 | 0 |
| 1999 | 7 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 0 |
| 2002 | 5 | 4 |
| 2003 | 9 | 7 |
| 2004 | 6 | 11 |
| 2005 | 7 | 13 |
| 2006 | 6 | 10 |
| 2007 | 3 | 12 |
| 2008 | 8 | 7 |
| 2009 | 8 | 22 |
| 2010 | 11 | 20 |
| 2011 | 18 | 12 |
| 2012 | 15 | 14 |
| 2013 | 13 | 14 |
| 2014 | 16 | 21 |
| 2015 | 22 | 25 |
| 2016 | 13 | 23 |
| 2017 | 19 | 24 |
| 2018 | 13 | 21 |
| 2019 | 22 | 40 |
| 2020 | 30 | 35 |
| 2021 | 40 | 29 |
| 2022 | 23 | 28 |
| 2023 | 23 | 31 |
| 2024 | 16 | 26 |
| 2025 | 19 | 18 |
| 2026 | 16 | 19 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Purification method for anhydrous aluminum chloride, and gas-phase nano-alumina preparation device and method therefor17 Sep 2026US 2026/0274702 A1Guangzhou Huifu Research Institute Co., Ltd.
- Hydrocyclone separator20 Aug 2026US 2026/0241394 A1Metso Sweden AB
- Compact disc stack cyclone separator20 Aug 2026US 2026/0241395 A1
- Multi-use vacuum cleaner6 Aug 2026US 2026/0224077 A1Senur Elektrik Motorlari San. Ve Tic. A.S.
- Method and system for treating fluid30 Jul 2026US 2026/0216738 A1Vortex Corporation
Most cited
By later US patents
- Upright vacuum cleaner with cyclonic air flow295US 6,782,585 B1Fantom Technologies Inc. · 2004
- Device for separating impurities from gases212US 3,988,132 AStamicarbon B. V. · 1976
- Cyclone dust collecting apparatus for a vacuum cleaner185US 6,623,539 B2Samsung Gwangju Electronics Co., Ltd. · 2003
- Vacuum cleaner and cyclone module therefor170US 8,062,398 B2BISSELL Homecare, Inc. · 2011
- Cleaner head for a vacuum cleaner162US 6,334,234 B12002