B21C 37/298
Forming collars by flow-drilling
Official title: {Forming collars by flow-drilling}
B21C37/298 (Forming collars by flow-drilling) appears on 31 US grants and 11 published applications in this corpus.
Search patents in B21C- Granted patents
- 31
- Published applications
- 11
- Assignees
- 25
- Inventors
- 68
- Latest grant
- 16 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 5 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 2 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Stainless steel spray boom for aerial spraying16 Sep 2025US 12,415,192 B2Texas Transland LLC
- Methods and machine tools for machine-cutting workpieces in plate form or bar form23 Nov 2021US 11,179,810 B2TRUMPF Werkzeugmaschinen GmbH + Co. KG
- Metal structure defining circular flanged hole and method for making the same3 May 2011US 7,934,409 B2Hon Hai Precision Industry Co., Ltd.
- Internal combustion engine exhaust device and method for making same1 Feb 2005US 6,848,438 B2Renault S. A. S.
- Automated collar-forming drill mechanism6 Aug 2002US 6,427,508 B1T-Drill Oy
- Friction drilled spray header16 Apr 2026US 2026/0102780 A1
- Stainless Steel Spray Boom for Aerial Spraying1 Jan 2026US 2026/0001089 A1Texas Transland LLC
- Workpiece processing method, machine tool, and non-transitory computer-readable recording medium25 Sep 2025US 2025/0296176 A1Yamazaki Mazak Corporation
- Stainless Steel Spray Boom for Aerial Spraying20 Oct 2022US 2022/0331820 A1Texas Transland LLC
- Methods and machine tools for machine-cutting workpieces in plate form or bar form31 Jan 2019US 2019/0030649 A1TRUMPF Werkzeugmaschinen GmbH + Co. KG
Most cited
By later US patents
- Method for boring a spoke rim and for providing an insert for the bored rim29US 6,216,344 B1Mavic S.A.S. · 2001
- Method and tool for forming a tapered hole in a cylindrical work by punching extruding25US 5,816,093 ANitto Kohki Co., Ltd. · 1998
- Flow drilling process and tool therefor21US 4,428,214 ADeere & Company · 1984
- Vehicle auxiliary assist step assembly20US 5,137,293 AWickes Manufacturing Company · 1992
- Rotatable piercing tools for forming bossed holes14US 4,185,486 ATechnisch Handels- en Adviesbureau van Geffen B.V. · 1980