B23K 9/326
Purge gas rings, i.e. devices for supplying or evacuating shielding gas inside
Official title: {Purge gas rings, i.e. devices for supplying or evacuating shielding gas inside of hollow or tubular articles, e.g. pipes, vessels}
B23K9/326 (Purge gas rings, i.e. devices for supplying or evacuating shielding gas inside) appears on 57 US grants and 48 published applications in this corpus.
Search patents in B23K- Granted patents
- 57
- Published applications
- 48
- Assignees
- 28
- Inventors
- 84
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 4 | 2 |
| 2014 | 0 | 4 |
| 2015 | 1 | 2 |
| 2016 | 3 | 5 |
| 2017 | 2 | 2 |
| 2018 | 3 | 4 |
| 2019 | 5 | 2 |
| 2020 | 2 | 4 |
| 2021 | 1 | 4 |
| 2022 | 3 | 5 |
| 2023 | 2 | 1 |
| 2024 | 2 | 1 |
| 2025 | 2 | 2 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Apparatus for pipe purging26 May 2026US 12,636,726 B2Airgas, Inc.
- Orbital welding device with improved residual oxygen measurement31 Mar 2026US 12,589,453 B2Illinois Tool Works Inc.
- Back purging robotic crawler24 Feb 2026US 12,558,737 B2Saudi Arabian Oil Company
- Orbital welding device with simpler handling of the measurement of residual oxygen20 May 2025US 12,304,012 B2Illinois Tool Works Inc.
- Method for pipe purging25 Mar 2025US 12,257,656 B2Airgas, Inc.
- Portable Purge Chamber for Controlled Atmosphere Welding of Readily Contaminated Metals Like Titanium or Zirconium27 Aug 2026US 2026/0249377 A1
- Mobile close proximity orbital welding system having a shielded weld zone7 May 2026US 2026/0124692 A1Valex, Inc.
- Orbital welding device with improved residual oxygen measurement24 Apr 2025US 2025/0128363 A1Illinois Tool Works Inc.
- Back purging robotic crawler27 Mar 2025US 2025/0100067 A1Saudi Arabian Oil Company
- System and methods of smart welding operations5 Dec 2024US 2024/0399483 A1Rotorweld, LLC
Most cited
By later US patents
- Welding apparatus and method45US 5,435,478 A1995
- Purge block for pipe welding34US 5,187,343 A1993
- Vapor plug for temporarily sealing or plugging a pipeline31US 4,875,615 AInterprovincial Pipe Line Company · 1989
- Welding gas purging apparatus and method23US 5,390,846 A1995
- Welding apparatus23US 5,601,225 AJ. A. Jones Applied Research Company · 1997