H01H 33/12
Auxiliary contacts on to which the arc is transferred from the main
Official title: Auxiliary contacts on to which the arc is transferred from the main contacts (using arcing horns H01H33/20)
H01H33/12 (Auxiliary contacts on to which the arc is transferred from the main) appears on 334 US grants and 240 published applications in this corpus.
Search patents in H01H- Granted patents
- 334
- Published applications
- 240
- Assignees
- 129
- Inventors
- 679
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 7 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 10 | 0 |
| 1982 | 5 | 0 |
| 1983 | 6 | 0 |
| 1984 | 6 | 0 |
| 1985 | 11 | 0 |
| 1986 | 6 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 6 | 0 |
| 1992 | 3 | 0 |
| 1993 | 10 | 0 |
| 1994 | 9 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 9 | 0 |
| 2002 | 2 | 4 |
| 2003 | 1 | 2 |
| 2004 | 6 | 3 |
| 2005 | 3 | 5 |
| 2006 | 4 | 1 |
| 2007 | 3 | 7 |
| 2008 | 0 | 5 |
| 2009 | 3 | 11 |
| 2010 | 3 | 3 |
| 2011 | 8 | 2 |
| 2012 | 5 | 5 |
| 2013 | 5 | 12 |
| 2014 | 3 | 17 |
| 2015 | 9 | 17 |
| 2016 | 18 | 9 |
| 2017 | 12 | 15 |
| 2018 | 10 | 11 |
| 2019 | 15 | 14 |
| 2020 | 19 | 21 |
| 2021 | 21 | 16 |
| 2022 | 15 | 15 |
| 2023 | 10 | 15 |
| 2024 | 11 | 14 |
| 2025 | 13 | 9 |
| 2026 | 4 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Automatic drop-out and reset of a vacuum interrupter device in a cutout mounting21 Apr 2026US 12,609,257 B2S&C Electric Company
- Loadbreak assembly24 Feb 2026US 12,562,525 B2Hubbell Incorporated
- Arc chute and load switch comprising same17 Feb 2026US 12,555,727 B2Ls Electric Co., Ltd.
- Arc chute and load break switch including same17 Feb 2026US 12,555,728 B2Ls Electric Co., Ltd.
- Electrical switching device25 Nov 2025US 12,482,618 B2Hitachi Energy Ltd
- Earth switching device17 Sep 2026US 2026/0279704 A1Hyosung Heavy Industries Corporation
- Loadbreak assembly9 Jul 2026US 2026/0196765 A1
- Hybrid circuit breaker and methods for opening and closing such a circuit breaker4 Jun 2026US 2026/0155323 A1Schneider Electric Industries SAS
- Disconnector contact system with controlled discharge30 Apr 2026US 2026/0120967 A1Hitachi Energy Ltd
- Method for determining an estimated travel curve of an interrupter unit, and interrupter unit for a gas-insulated high or medium voltage device30 Apr 2026US 2026/0120972 A1Hitachi Energy Ltd
Most cited
By later US patents
- 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
- Hybrid circuit breaker with axial blowout coil87US 5,280,144 AMerlin Gerin · 1994