B21B 21/04
Pilgrim-step feeding mechanisms
Official title: Pilgrim-step feeding mechanisms (B21B21/06 takes precedence)
B21B21/04 (Pilgrim-step feeding mechanisms) appears on 32 US grants and 11 published applications in this corpus.
Search patents in B21B- Granted patents
- 32
- Published applications
- 11
- Assignees
- 15
- Inventors
- 33
- Latest grant
- 13 Apr 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 3 |
| 2013 | 1 | 2 |
| 2014 | 0 | 0 |
| 2015 | 2 | 1 |
| 2016 | 1 | 2 |
| 2017 | 2 | 0 |
| 2018 | 1 | 0 |
| 2019 | 1 | 2 |
| 2020 | 0 | 0 |
| 2021 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Cold pilger rolling mill and method for producing a pipe13 Apr 2021US 10,974,295 B2Sandvik Materials Technology Deutschland GmbH
- Cold pilger rolling mill and method for producing a pipe16 Mar 2021US 10,946,424 B2Sandvik Materials Technology Deutschland GmbH
- Cold pilger rolling mill and method for forming a tube shell to a tube12 Mar 2019US 10,226,802 B2Sandvik Materials Technology Deutschland GmbH
- Feed drive for a cold pilgering mill18 Dec 2018US 10,155,257 B2Sandvik Materials Technology Deutschland GmbH
- Cold pilger rolling mill and method for forming a hollow shell into a tube24 Oct 2017US 9,796,007 B2Sandvik Materials Technology Deutschland GmbH
- Cold pilger rolling mill and method for producing a pipe30 May 2019US 2019/0160501 A1Sandvik Materials Technology Deutschland GmbH
- Cold pilger rolling mill and method for producing a pipe23 May 2019US 2019/0151916 A1Sandvik Materials Technology Deutschland GmbH
- Cold pilger rolling mill and method for forming a hollow shell into a tube6 Oct 2016US 2016/0288180 A1Sandvik Materials Technology Deutschland GmbH
- Cold pilger rolling mill and method for forming a tube shell to a tube14 Jul 2016US 2016/0199893 A1Sandvik Materials Technology Deutschland GmbH
- Pilger rolling train17 Sep 2015US 2015/0258590 A1Sandvik Materials Technology Deutschland GmbH
Most cited
By later US patents
- Hydraulic shock absorber25US 4,044,865 AAB Mecman · 1977
- Shell feed system for a cold pilger mill12US 4,037,444 AWean United, Inc. · 1977
- System for the continuous operation of a cold pilger rolling mill10US 4,577,483 AMannesmann Demag Wean · 1986
- Method permitting the increase of operations of cold pilger mills and an apparatus for the embodiment of this method10US 4,658,617 AVallourec · 1987
- Motion control for the feed mechanism in pilger rolling mills9US 3,948,070 AMannesmannrohren-Werke AG · 1976