B21D 11/06
Bending into helical or spiral form
Official title: Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form (making helically seamed tubing B21C37/12)
B21D11/06 (Bending into helical or spiral form) appears on 147 US grants and 91 published applications in this corpus.
Search patents in B21D- Granted patents
- 147
- Published applications
- 91
- Assignees
- 110
- Inventors
- 302
- Latest grant
- 18 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 7 | 0 |
| 1979 | 6 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 0 |
| 2002 | 4 | 0 |
| 2003 | 2 | 4 |
| 2004 | 2 | 4 |
| 2005 | 1 | 6 |
| 2006 | 4 | 3 |
| 2007 | 3 | 3 |
| 2008 | 1 | 3 |
| 2009 | 1 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 3 |
| 2012 | 2 | 1 |
| 2013 | 1 | 7 |
| 2014 | 3 | 5 |
| 2015 | 5 | 3 |
| 2016 | 3 | 7 |
| 2017 | 6 | 7 |
| 2018 | 3 | 7 |
| 2019 | 5 | 5 |
| 2020 | 5 | 1 |
| 2021 | 5 | 10 |
| 2022 | 4 | 4 |
| 2023 | 5 | 0 |
| 2024 | 2 | 2 |
| 2025 | 2 | 2 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cable bending system18 Nov 2025US 12,472,551 B2TE Connectivity Solutions GmbH
- Automotive bending tool and method of repairing automobile turbocharger system without removing or disassembling components of the turbocharger20 May 2025US 12,303,963 B2
- Roller molding method for producing a spiral structure30 Apr 2024US 11,973,383 B2Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
- Entwined tubular arrangements for heat exchangers and counterflow heat transfer systems13 Feb 2024US 11,897,015 B2Hs Marston Aerospace Limited
- Directed decoupling between bundle and core tube in wound heat exchangers12 Dec 2023US 11,841,194 B2Linde Aktiengesellschaft
- Bending machine27 Aug 2026US 2026/0249340 A1Odfjell Oceanwind AS
- Method of manufacture of a reinforced pipe15 Jan 2026US 2026/0014611 A1Odfjell Oceanwind AS
- Method of manufacturing armature10 Apr 2025US 2025/0119041 A1NHK Spring Co., Ltd.
- Tensioning device for winding metal tubes into a coil16 Jan 2025US 2025/0018452 A1Chastnoe Uchrezhdenie Po Obespecheniyu Nauchnogo Razvitiya Atomnoj Otrasli "Nauka I Innovacii"
- Automotive bending tool and method of repairing automobile turbocharger system without removing or disassembling components of the turbocharger25 Jul 2024US 2024/0246210 A1
Most cited
By later US patents
- Continuous, chaotic convection mixer, heat exchanger and reactor27US 6,331,072 B1Axiva GmbH · 2001
- Woven wire netting for protection against rock falls or for securing a top layer of soil, and method and device for producing same26US 6,279,858 B1Fatzer AG · 2001
- Roller mechanism for forming helical shapes25US 4,546,631 AFoster Wheeler Energy Corporation · 1985
- Spiral component for a baluster and method and machine for making same21US 5,676,013 A1997
- Method for bending tubes20US 5,142,895 AAmana Refrigeration, Inc. · 1992