H01H 33/88
The flow of arc-extinguishing fluid being produced or increased by movement of
Official title: the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
H01H33/88 (The flow of arc-extinguishing fluid being produced or increased by movement of) appears on 465 US grants and 231 published applications in this corpus.
Search patents in H01H- Granted patents
- 465
- Published applications
- 231
- Assignees
- 116
- Inventors
- 701
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 10 | 0 |
| 1978 | 15 | 0 |
| 1979 | 10 | 0 |
| 1980 | 17 | 0 |
| 1981 | 16 | 0 |
| 1982 | 13 | 0 |
| 1983 | 12 | 0 |
| 1984 | 21 | 0 |
| 1985 | 13 | 0 |
| 1986 | 7 | 0 |
| 1987 | 10 | 0 |
| 1988 | 6 | 0 |
| 1989 | 3 | 0 |
| 1990 | 9 | 0 |
| 1991 | 10 | 0 |
| 1992 | 14 | 0 |
| 1993 | 8 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 10 | 0 |
| 1997 | 2 | 0 |
| 1998 | 13 | 0 |
| 1999 | 10 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 2 |
| 2002 | 5 | 3 |
| 2003 | 6 | 4 |
| 2004 | 5 | 3 |
| 2005 | 1 | 5 |
| 2006 | 2 | 2 |
| 2007 | 2 | 9 |
| 2008 | 2 | 13 |
| 2009 | 2 | 7 |
| 2010 | 7 | 10 |
| 2011 | 11 | 12 |
| 2012 | 10 | 3 |
| 2013 | 8 | 13 |
| 2014 | 11 | 12 |
| 2015 | 15 | 20 |
| 2016 | 19 | 13 |
| 2017 | 14 | 13 |
| 2018 | 14 | 12 |
| 2019 | 11 | 12 |
| 2020 | 12 | 11 |
| 2021 | 11 | 13 |
| 2022 | 7 | 9 |
| 2023 | 6 | 7 |
| 2024 | 8 | 7 |
| 2025 | 10 | 7 |
| 2026 | 1 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01H 33/90This movement being effected by or in conjunction with the contact-operating mechanism391
- H01H 2033/888Deflection of hot gasses and arcing productsIndexing code70
- H01H 33/94This movement being effected solely due to the pressure caused by the13
- H01H 33/882The movement being assisted by accelerating coils12
- H01H 33/886By movement of rotating pistons5
- H01H 33/884With variable-area piston3
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
- Linear puffer switch24 Sep 2026US 2026/0290731 A1
- Electric arc blast nozzel20 Aug 2026US 2026/0245817 A1GE Vernova Infrastructure Technology LLC
- Switchgear16 Jul 2026US 2026/0204500 A1Mitsubishi Electric Corporation
- Self-blast circuit breaker and auxiliary nozzle therefor25 Jun 2026US 2026/0179865 A1Mitsubishi Electric Power Products, Inc.
- Circuit breaker device28 May 2026US 2026/0148916 A1Kabushiki Kaisha Toshiba
Most cited
By later US patents
- Self-expansion electrical circuit breaker with variable extinguishing chamber volume84US 4,950,855 AMerlin Gerin · 1990
- Gas-blast electrical circuit breaker82US 5,095,183 AMerlin Gerin · 1992
- Switch30US 5,514,844 AMitsubishi Denki Kabushiki Kaisha · 1996
- Energy efficient floating head puffer interrupter26US 4,445,018 AMcGraw-Edison Company · 1984
- Gas insulated switchgear23US 7,816,618 B2Kabushiki Kaisha Toshiba · 2010