H01H 33/70
Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing
Official title: Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
H01H33/70 (Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing) appears on 745 US grants and 372 published applications in this corpus.
Search patents in H01H- Granted patents
- 745
- Published applications
- 372
- Assignees
- 175
- Inventors
- 1,111
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 28 | 0 |
| 1977 | 20 | 0 |
| 1978 | 20 | 0 |
| 1979 | 12 | 0 |
| 1980 | 33 | 0 |
| 1981 | 30 | 0 |
| 1982 | 20 | 0 |
| 1983 | 23 | 0 |
| 1984 | 33 | 0 |
| 1985 | 15 | 0 |
| 1986 | 13 | 0 |
| 1987 | 20 | 0 |
| 1988 | 11 | 0 |
| 1989 | 10 | 0 |
| 1990 | 15 | 0 |
| 1991 | 14 | 0 |
| 1992 | 17 | 0 |
| 1993 | 15 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 10 | 0 |
| 1997 | 3 | 0 |
| 1998 | 18 | 0 |
| 1999 | 12 | 0 |
| 2000 | 9 | 0 |
| 2001 | 7 | 4 |
| 2002 | 10 | 5 |
| 2003 | 7 | 6 |
| 2004 | 11 | 5 |
| 2005 | 2 | 6 |
| 2006 | 4 | 6 |
| 2007 | 4 | 12 |
| 2008 | 2 | 18 |
| 2009 | 4 | 14 |
| 2010 | 9 | 11 |
| 2011 | 13 | 12 |
| 2012 | 12 | 8 |
| 2013 | 10 | 19 |
| 2014 | 15 | 23 |
| 2015 | 24 | 32 |
| 2016 | 30 | 24 |
| 2017 | 22 | 17 |
| 2018 | 23 | 19 |
| 2019 | 16 | 20 |
| 2020 | 25 | 21 |
| 2021 | 21 | 28 |
| 2022 | 21 | 16 |
| 2023 | 12 | 12 |
| 2024 | 12 | 12 |
| 2025 | 14 | 10 |
| 2026 | 1 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01H 33/88The flow of arc-extinguishing fluid being produced or increased by movement of465
- H01H 33/7015Characterised by flow directing elements associated with contacts238
- H01H 33/72Having stationary parts for directing the flow of arc-extinguishing fluid79
- H01H 33/76Wherein arc-extinguishing gas is evolved from stationary parts75
- H01H 33/98The flow of arc-extinguishing fluid being initiated by an auxiliary arc or68
- H01H 33/80Flow of arc-extinguishing fluid from a pressure source being controlled by a26
- H01H 33/7007Wherein the flow is a function of the current being interrupted12
- H01H 33/86The flow of arc-extinguishing fluid under pressure from the contact space being9
Recent patents
- Circuit breaker comprising an improved gas flow management9 Jun 2026US 12,651,716 B2GE Vernova Infrastructure Technology LLC
- Contactor and general switching device comprised thereof9 Dec 2025US 12,494,332 B2
- Electrical switching device25 Nov 2025US 12,482,618 B2Hitachi Energy Ltd
- Earthing switch18 Nov 2025US 12,476,055 B2Hyundai Electric & Energy Systems Co., Ltd.
- High voltage circuit-breaker26 Aug 2025US 12,400,816 B2Hitachi Energy Ltd
- Medium or high voltage circuit breaker1 Oct 2026US 2026/0302108 A1GE Vernova Infrastructure Technology LLC
- Linear puffer switch24 Sep 2026US 2026/0290731 A1
- Electric arc blast nozzel20 Aug 2026US 2026/0245817 A1GE Vernova Infrastructure Technology LLC
- Power contactor having an electric arc clarification screen, and aircraft comprising such a power contactor13 Aug 2026US 2026/0237579 A1Safran Electrical & Power
- Electric switch and electric switch assembly30 Jul 2026US 2026/0221358 A1
Most cited
By later US patents
- Primary circuit breaker101US 4,435,690 ARTE Corporation · 1984
- Gas-blast circuit breaker90US 4,935,590 AMerlin Gerin · 1990
- Rotating arc and expansion circuit breaker87US 4,900,882 A1990
- Rotating arc circuit breaker with centrifugal extinguishing gas effect87US 5,001,313 AMerlin Gerin · 1991
- Electrical circuit breaker with rotating arc and self-extinguishing expansion87US 5,166,483 AMerlin Gerin · 1992