B04C 1/00
Apparatus in which the main direction of flow follows a flat spiral
Official title: Apparatus in which the main direction of flow follows a flat spiral {; so-called flat cyclones or vortex chambers}
B04C1/00 (Apparatus in which the main direction of flow follows a flat spiral) appears on 75 US grants and 50 published applications in this corpus.
Search patents in B04C- Granted patents
- 75
- Published applications
- 50
- Assignees
- 48
- Inventors
- 123
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 4 |
| 2010 | 0 | 2 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 1 | 10 |
| 2015 | 1 | 1 |
| 2016 | 7 | 1 |
| 2017 | 2 | 1 |
| 2018 | 3 | 2 |
| 2019 | 1 | 5 |
| 2020 | 3 | 3 |
| 2021 | 4 | 7 |
| 2022 | 4 | 1 |
| 2023 | 2 | 2 |
| 2024 | 3 | 1 |
| 2025 | 2 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Low profile dust separator23 Jun 2026US 12,661,663 B2
- Dust separator4 Nov 2025US D1,101,327 S1Faster Better Easier, LLC · Design
- Vortex flow device for removing foreign matter from a liquid14 Oct 2025US 12,440,783 B2BUNRI Incorporation
- Dust separator22 Oct 2024US D1,048,618 S1Faster Better Easier, LLC · Design
- Adjustable abrasive and dust separator24 Sep 2024US 12,097,457 B2Media Blast & Abrasive, Inc.
- Treatment device8 Oct 2026US 2026/0307095 A1Toyota Shatai Kabushiki Kaisha
- Low profile dust separator13 Nov 2025US 2025/0345809 A1Faster Better Easier, LLC
- Low Profile Dust Separator15 May 2025US 2025/0153195 A1
- Cyclonic particle separator24 Apr 2025US 2025/0129726 A1
- Deduster26 Dec 2024US 2024/0423431 A1
Most cited
By later US patents
- Vacuum loader with vaned and short tangential separator63US 5,180,407 A1993
- Method and apparatus for separating out solids suspended in flowing, pure water systems44US 4,343,707 AElectric Power Research Institute, Inc. · 1982
- Cyclone separator for an internal combustion engine44US 5,460,147 AKnecht Filterwerke GmbH · 1995
- Centrifugal treatment of fluids42US 4,001,121 AMesserschmitt-Bolkow-Blohm GmbH - Division Hamburger Flugzeugbau · 1977
- Apparatus for classifying airborne particulate matter38US 4,383,917 AUniversity of Utah · 1983