B21D 9/15
Bending tubes using mandrels or the like: using filling material of indefinite
Official title: using filling material of indefinite shape, e.g. sand, plastic material (filling of tubes with such material B21D9/16)
B21D9/15 (Bending tubes using mandrels or the like: using filling material of indefinite) appears on 31 US grants and 23 published applications in this corpus.
Search patents in B21D- Granted patents
- 31
- Published applications
- 23
- Assignees
- 29
- Inventors
- 78
- Latest grant
- 6 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 1 | 4 |
| 2007 | 1 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 2 |
| 2010 | 1 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 3 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 2 |
| 2020 | 0 | 0 |
| 2021 | 1 | 2 |
| 2022 | 2 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Electrically assisted forming process and device for high-strength metal alloy thin-walled pipe6 May 2025US 12,290,851 B2Central Iron and Steel Research Institute
- Apparatus and method for forming large-scale thin-walled ring shell by hot-press bending with internal gas pressure16 Aug 2022US 11,413,672 B2Dalian University of Technology
- Centrifugal air separator coil manufacturing methods1 Feb 2022US 11,235,279 B2The Boeing Company
- Differential temperature push bending method and device for tube with small bending radius30 Nov 2021US 11,185,904 B2Nanchang Hangkong University (NCHU)
- Centrifugal air separator coil manufacturing tools and methods18 Jun 2019US 10,322,368 B2The Boeing Company
- Integral forming method for large-size thin-walled ring shell31 Oct 2024US 2024/0359225 A1Dalian University of Technology
- Electrically assisted forming process and device for high-strength metal alloy thin-walled pipe3 Nov 2022US 2022/0347733 A1Central Iron and Steel Research Institute
- Apparatus and method for forming large-scale thin-walled ring shell by hot-press bending with internal gas pressure25 Nov 2021US 2021/0362209 A1Dalian University of Technology
- Method for bending hydroformed cooling devices and bent hydroformed cooling devices27 May 2021US 2021/0154722 A1
- Centrifugal air separator coil manufacturing methods15 Aug 2019US 2019/0247786 A1The Boeing Company
Most cited
By later US patents
- Apparatus and method for forming a tubular member53US 5,481,892 A1996
- Apparatus and method for forming a tubular frame member38US 5,353,618 AArmco Steel Corporation · 1994
- Apparatus and method for forming a tubular frame member35US 5,239,852 AArmco Steel Corporation · 1993
- Process of hydroforming tubular suspension and frame components for vehicles34US 5,673,929 AMascotech Tublular Products, Inc. · 1997
- Suspension arm, and process for producing the same29US 5,662,349 AHonda Giken Kogyo Kabushiki Kaisha · 1997