B21C 3/16
Mandrels
Official title: Mandrels; Mounting or adjusting same
B21C3/16 (Mandrels) appears on 44 US grants and 38 published applications in this corpus.
Search patents in B21C- Granted patents
- 44
- Published applications
- 38
- Assignees
- 38
- Inventors
- 136
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 2 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 3 |
| 2011 | 1 | 2 |
| 2012 | 2 | 2 |
| 2013 | 0 | 2 |
| 2014 | 1 | 1 |
| 2015 | 1 | 5 |
| 2016 | 4 | 2 |
| 2017 | 3 | 2 |
| 2018 | 1 | 2 |
| 2019 | 0 | 1 |
| 2020 | 3 | 2 |
| 2021 | 1 | 1 |
| 2022 | 1 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 2 |
| 2025 | 1 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Devices and method for shaping a tubular hollow element29 Sep 2026US 12,746,587 B2FELSS Systems GmbH
- Apparatus and method for reducing the cross section of a tubular hollow body by shaping the hollow body16 Jun 2026US 12,654,212 B2FELSS Systems GmbH
- Drawing machine, drawing method and drawing mandrel18 Nov 2025US 12,472,546 B2SMS group GmbH
- Method of manufacturing variable wall thickness steel pipe and variable wall thickness steel pipe28 Feb 2023US 11,590,547 B2Nippon Steel Corporation
- Conduits for transporting fluids and methods of fabricating the same29 Nov 2022US 11,512,807 B2The Boeing Company
- Method and mechanical arrangement for producing a tubular hollow body from a tubular hollow body blank, in particular for producing a hollow shaft from a shaft blank13 Aug 2026US 2026/0233293 A1FELSS Systems GmbH
- Method and mechanical arrangement for producing a wall profile on a plastically deformable hollow body wall5 Mar 2026US 2026/0061470 A1FELSS Systems GmbH
- Devices and method for shaping a tubular hollow element27 Feb 2025US 2025/0065384 A1FELSS Systems GmbH
- Method for manufacturing multi-layered nuclear fuel cladding and multi-layered nuclear fuel cladding produced thereby29 Aug 2024US 2024/0290508 A1Gachon University of Industry-Academic Cooperation Foundation
- Apparatus and method for reducing the cross section of a tubular hollow body by shaping the hollow body22 Aug 2024US 2024/0278304 A1FELSS Systems GmbH
Most cited
By later US patents
- Locking wedge assembly for two-piece mechanically connected mandrels31US 5,263,351 AItalimpianti of America, Inc. · 1993
- Enhanced heat exchange tube25US 6,164,370 AOlin Corporation · 2000
- Tube drawing technique22US 4,161,112 AThe Babcock & Wilcox Company · 1979
- Method of manufacturing a heating exchange tube20US 5,388,329 AOlin Corporation · 1995
- Manufacture of metal tubes15US 6,799,357 B2Memry Corporation · 2004