B21B 25/06
Interchanging mandrels , fixing plugs on mandrel rods or cooling during interchanging
Official title: Interchanging mandrels {, fixing plugs on mandrel rods or cooling during interchanging mandrels (separating tubes from mandrels B21C45/00)}
B21B25/06 (Interchanging mandrels , fixing plugs on mandrel rods or cooling during interchanging) appears on 28 US grants and 10 published applications in this corpus.
Search patents in B21B- Granted patents
- 28
- Published applications
- 10
- Assignees
- 17
- Inventors
- 74
- Latest grant
- 26 Oct 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 3 |
| 2016 | 3 | 0 |
| 2017 | 1 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 2 |
| 2021 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Rolling mill for rolling concave, rod-shaped bodies26 Oct 2021US 11,154,920 B2Danieli & C. Officine Meccaniche SpA
- Manufacturing method of seamless metal pipe, mandrel mill, and auxiliary tool6 Feb 2018US 9,884,355 B2Nippon Steel & Sumitomo Metal Corporation
- Manufacturing method and manufacturing apparatus of seamless metal pipe21 Mar 2017US 9,597,718 B2Nippon Steel & Sumitomo Metal Corporation
- Inner surface regulation tool, plug, mandrel, hot rolling mill, press piercing machine, and drawing machine8 Nov 2016US 9,486,845 B2Nippon Steel & Sumitomo Metal Corporation
- Mandrel holder head with release device20 Sep 2016US 9,446,438 B2Danieli & C. Officine Meccaniche SpA
- Continuous tube rolling method and mandrel assembly for the implementation thereof21 May 2020US 2020/0156127 A1Pubiichnoe aktsionernoe obshchestvo “trubnaya metallurgicheskaya kompaniya”
- Rolling mill for rolling hollow or, in all cases, concave rod-shaped bodies9 Jan 2020US 2020/0009625 A1Danieli & C. Officine Meccaniche SpA
- Inner surface regulation tool, plug, mandrel, hot rolling mill, press piercing machine, and drawing machine5 Nov 2015US 2015/0314346 A1Nippon Steel & Sumitomo Metal Corporation
- Manufacturing method and manufacturing apparatus of seamless metal pipe29 Oct 2015US 2015/0306646 A1Nippon Steel & Sumitomo Metal Corporation
- Manufacturing method of seamless metal pipe, mandrel mill, and auxiliary tool7 May 2015US 2015/0121982 A1Nippon Steel & Sumitomo Metal Corporation
Most cited
By later US patents
- Apparatus for the lateral transfer of mandrels in a tube rolling mill10US 4,585,114 AInnse Innocenti Santeustacchio S.p.A. · 1986
- Plug changing mechanism for use in piercing mills9US 4,022,043 AValti Societe Anonyme pour la Fabrication de Tubes Roulements · 1977
- Continuous flow plug mill system9US 4,037,449 AAetna-Standard Engineering Company · 1977
- Piercing and rolling plug, method of regenerating such piercing and rolling plug, and equipment line for regenerating such piercing and rolling plug8US 8,082,768 B2Sumitomo Metal Industries, Ltd. · 2011
- Seamless tube piercing/rolling apparatus, and seamless tube producing therewith5US 7,383,710 B2Sumitomo Metal Industries, Ltd. · 2008