B21D 25/02
Working sheet metal of limited length by stretching: by pulling over a
Official title: by pulling over a die
B21D25/02 (Working sheet metal of limited length by stretching: by pulling over a) appears on 61 US grants and 43 published applications in this corpus.
Search patents in B21D- Granted patents
- 61
- Published applications
- 43
- Assignees
- 43
- Inventors
- 143
- Latest grant
- 3 May 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 0 | 5 |
| 2003 | 4 | 0 |
| 2004 | 4 | 3 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 1 | 3 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 4 |
| 2011 | 2 | 3 |
| 2012 | 0 | 0 |
| 2013 | 0 | 4 |
| 2014 | 1 | 0 |
| 2015 | 3 | 3 |
| 2016 | 1 | 5 |
| 2017 | 2 | 1 |
| 2018 | 1 | 4 |
| 2019 | 3 | 1 |
| 2020 | 3 | 4 |
| 2021 | 3 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Stretch forming method for a sheet metal skin with convex and concave curvatures3 May 2022US 11,318,520 B2
- Method and apparatus for forming a nacelle leading edge20 Jul 2021US 11,065,668 B2Rohr, Inc.
- Method and apparatus for forming double curvature corrugated and surface textured panels15 Jun 2021US 11,033,947 B2Tirnaform Limited
- Stretch forming die2 Mar 2021US 10,933,458 B2Fca US LLC
- Lip skin sector and a method and apparatus for forming a lip skin sector29 Dec 2020US 10,875,079 B2Rohr, Inc.
- Modular Stretch Block Using Additive Manufacturing5 Sep 2024US 2024/0293859 A1Textron Aviation Inc.
- Methods and assemblies for forming an annular object5 Aug 2021US 2021/0237139 A1Rohr, Inc.
- Method and apparatus for forming a nacelle leading edge6 Aug 2020US 2020/0246859 A1Rohr, Inc.
- Stretch Forming Method for a Sheet Metal Skin with Convex and Concave Curvatures2 Jul 2020US 2020/0206799 A1
- Stretch forming die25 Jun 2020US 2020/0197997 A1Fca US LLC
Most cited
By later US patents
- Method and apparatus for forming a metal sheet under elevated temperature and air pressure69US 6,619,094 B2Airbus Deutschland GmbH · 2003
- Working of a metallic strip37US 6,063,216 ATrico Products Corporation · 2000
- Block-set form die assembly32US 6,053,026 ANorthrop Grumman Corporation · 2000
- Titanium stretch forming apparatus and method30US 8,037,730 B2Cyril Bath Company · 2011
- Stretch-forming process29US 4,704,886 AAluminum Company of America · 1987