H01H 33/04
Means for extinguishing or preventing arc between current-carrying parts
H01H33/04 (Means for extinguishing or preventing arc between current-carrying parts) appears on 1,092 US grants and 814 published applications in this corpus.
Search patents in H01H- Granted patents
- 1,092
- Published applications
- 814
- Assignees
- 312
- Inventors
- 2,099
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 18 | 0 |
| 1978 | 27 | 0 |
| 1979 | 7 | 0 |
| 1980 | 11 | 0 |
| 1981 | 33 | 0 |
| 1982 | 17 | 0 |
| 1983 | 20 | 0 |
| 1984 | 28 | 0 |
| 1985 | 28 | 0 |
| 1986 | 18 | 0 |
| 1987 | 11 | 0 |
| 1988 | 9 | 0 |
| 1989 | 12 | 0 |
| 1990 | 8 | 0 |
| 1991 | 12 | 0 |
| 1992 | 10 | 0 |
| 1993 | 21 | 0 |
| 1994 | 19 | 0 |
| 1995 | 10 | 0 |
| 1996 | 10 | 0 |
| 1997 | 16 | 0 |
| 1998 | 18 | 0 |
| 1999 | 11 | 0 |
| 2000 | 10 | 0 |
| 2001 | 13 | 5 |
| 2002 | 12 | 7 |
| 2003 | 7 | 6 |
| 2004 | 9 | 9 |
| 2005 | 8 | 11 |
| 2006 | 7 | 6 |
| 2007 | 7 | 9 |
| 2008 | 2 | 13 |
| 2009 | 7 | 21 |
| 2010 | 8 | 10 |
| 2011 | 8 | 8 |
| 2012 | 14 | 21 |
| 2013 | 17 | 51 |
| 2014 | 30 | 73 |
| 2015 | 47 | 66 |
| 2016 | 70 | 49 |
| 2017 | 53 | 47 |
| 2018 | 42 | 49 |
| 2019 | 63 | 50 |
| 2020 | 50 | 53 |
| 2021 | 53 | 49 |
| 2022 | 38 | 48 |
| 2023 | 42 | 50 |
| 2024 | 36 | 42 |
| 2025 | 32 | 25 |
| 2026 | 22 | 36 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01H 33/12Auxiliary contacts on to which the arc is transferred from the main334
- H01H 33/16Impedances connected with contacts249
- H01H 33/18Using blow-out magnet178
- H01H 33/08Stationary parts for restricting or subdividing the arc136
- H01H 33/14Multiple main contacts for the purpose of dividing the current through, or136
- H01H 33/22Selection of fluids for arc-extinguishing85
- H01H 33/06Insulating body insertable between contacts41
- H01H 33/045For arcs formed during closing27
All 9 subgroupsShow fewer
Recent patents
- Arc extinguishing unit and air circuit breaker comprising same25 Aug 2026US 12,718,996 B2Ls Electric Co., Ltd.
- Vacuum circuit breaker25 Aug 2026US 12,718,997 B2Mitsubishi Electric Corporation
- Electrical switching arrangement11 Aug 2026US 12,706,257 B2Eaton Intelligent Power Limited
- Electric switch4 Aug 2026US 12,700,552 B2ABB Schweiz AG
- Multi-contact miniature circuit breaker with reduced arcing28 Jul 2026US 12,695,036 B2Eaton Intelligent Power Limited
- Switching system of an electrical device8 Oct 2026US 2026/0311943 A1Schneider Electric Industries SAS
- Capacitor harvester24 Sep 2026US 2026/0290728 A1
- Hybrid switch assembly and circuit interrupter including the same17 Sep 2026US 2026/0279700 A1Eaton Intelligent Power Limited
- Earth switching device17 Sep 2026US 2026/0279704 A1Hyosung Heavy Industries Corporation
- Capacitor harvester17 Sep 2026US 2026/0279705 A1
Most cited
By later US patents
- Current limiting device117US 5,614,881 AGeneral Electric Company · 1997
- Medium tension circuit-breaker for indoor or outdoor use101US 5,350,892 AGEC Alsthom SA · 1994
- Hybrid medium voltage circuit breaker98US 5,155,315 AMerlin Gerin · 1992
- Electrical circuit breaker with two vacuum cartridges in series98US 5,347,096 AMerlin Gerin · 1994
- Sulfur hexafluoride isolating circuit-breaker and use thereof in prefabricated stations, substations, and bays94US 5,357,068 AGEC Alsthom SA · 1994