B21D 9/00
Bending tubes using mandrels or the like
Official title: Bending tubes using mandrels or the like (B21D11/02 - B21D11/18 take precedence)
B21D9/00 (Bending tubes using mandrels or the like) appears on 264 US grants and 178 published applications in this corpus.
Search patents in B21D- Granted patents
- 264
- Published applications
- 178
- Assignees
- 196
- Inventors
- 533
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 5 | 0 |
| 1984 | 6 | 0 |
| 1985 | 7 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 9 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 9 | 0 |
| 1997 | 7 | 0 |
| 1998 | 5 | 0 |
| 1999 | 7 | 0 |
| 2000 | 8 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 0 |
| 2003 | 3 | 3 |
| 2004 | 2 | 11 |
| 2005 | 1 | 8 |
| 2006 | 9 | 6 |
| 2007 | 8 | 2 |
| 2008 | 2 | 5 |
| 2009 | 3 | 7 |
| 2010 | 2 | 5 |
| 2011 | 1 | 4 |
| 2012 | 6 | 3 |
| 2013 | 2 | 8 |
| 2014 | 5 | 10 |
| 2015 | 6 | 9 |
| 2016 | 5 | 11 |
| 2017 | 5 | 13 |
| 2018 | 10 | 9 |
| 2019 | 13 | 9 |
| 2020 | 8 | 13 |
| 2021 | 9 | 10 |
| 2022 | 16 | 11 |
| 2023 | 4 | 4 |
| 2024 | 4 | 6 |
| 2025 | 11 | 9 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B21D 9/05Co-operating with forming members96
- B21D 9/01The mandrel being flexible and engaging the entire tube length82
- B21D 9/15Bending tubes using mandrels or the like: using filling material of indefinite31
- B21D 9/04The mandrel being rigid30
- B21D 9/12Bending tubes using mandrels or the like: by pushing over a curved30
- B21D 9/08In press brakes or between rams and anvils or abutments24
- B21D 9/16Auxiliary equipment23
- B21D 9/14Wrinkle-bending, i.e. bending by corrugating7
All 9 subgroupsShow fewer
Recent patents
- Coldwork holes with seamless sleeve and uniform expansion30 Dec 2025US 12,508,637 B1
- Bender9 Dec 2025US 12,491,552 B2
- Bending mandril comprising ultra high molecular weight material, related bending machines, systems, and methods25 Nov 2025US 12,479,019 B2Manufacturing Resources International, Inc.
- Device for the internal bending of pipes for pipelines28 Oct 2025US 12,453,998 B2Bendforce GmbH
- Helically wound tubular structures22 Jul 2025US 12,366,310 B2Techreo LLC
- Guiding device and method for filling a double-wall pipe with a granular material for the bending thereof17 Sep 2026US 2026/0273604 A1Airbus Atlantic
- Processing apparatus of trunk lid hinge arm, processing method of trunk lid hinge arm, and trunk lid hinge arm25 Dec 2025US 2025/0387824 A1Hyundai Motor Company
- Mandrel assembly for a tube bending machine27 Nov 2025US 2025/0360548 A1Blm S.P.A.
- Bending mandril comprising ultra high molecular weight material, related bending machines, systems, and methods2 Oct 2025US 2025/0303457 A1Manufacturing Resources International, Inc.
- Method and apparatus for expanding tube blanks31 Jul 2025US 2025/0242401 A1Hoffmann Neopac AG
Most cited
By later US patents
- Systems and methods for arc and node design and manufacture117US 10,173,255 B2Divergent Technologies, Inc. · 2019
- Vented bending sleeves for coaxial tubing systems60US 5,497,809 A1996
- Apparatus and method for forming a tubular member53US 5,481,892 A1996
- Apparatus and method for forming a tubular frame member38US 5,353,618 AArmco Steel Corporation · 1994
- Method and apparatus for continuous bending of elongated materials37US 4,061,005 ADaiichi Koshuha Kogyo Kabushiki Kaisha · 1977