H01H 33/75
Liquid-break switches
Official title: Liquid-break switches, e.g. oil-break
H01H33/75 (Liquid-break switches) appears on 11 US grants and 4 published applications in this corpus.
Search patents in H01H- Granted patents
- 11
- Published applications
- 4
- Assignees
- 8
- Inventors
- 24
- Latest grant
- 1 Feb 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 2 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Liquid arc voltage transfer based direct current breaker and use method thereof1 Feb 2022US 11,239,655 B2Xi' An Jiaotong University
- Disconnecting device with arc extinguishing14 Jul 2020US 10,714,276 B2Auto-Kabel Management GmbH
- Circuit arrangement and method for interrupting a current flow in a DC current path16 Sep 2014US 8,837,093 B2ABB Technology AG
- Oil-immersed and high-pressure tripping switch structure3 Apr 2007US 7,199,686 B1Jaker Electric Co., Ltd.
- Interrupt assembly for a primary circuit breaker29 Aug 2000US 6,111,212 ACooper Industries, Inc.
- Liquid arc voltage transfer based direct current breaker and use method thereof29 Oct 2020US 2020/0343719 A1Xi' An Jiaotong University
- Disconnecting Device with Arc Extinguishing27 Feb 2020US 2020/0066465 A1Auto-Kabel Management GmbH
- Self-blast circuit breaker using the two-phase state of a gas to improve the cut-off properties8 Jun 2017US 2017/0162349 A1ALSTOM Technology Ltd
- Circuit arrangement and method for interrupting a current flow in a dc current path24 Jan 2013US 2013/0020881 A1ABB Technology AG
Most cited
By later US patents
- Primary circuit breaker101US 4,435,690 ARTE Corporation · 1984
- Underoil primary circuit breaker17US 4,611,189 ARTE Corporation · 1986
- Circuit arrangement and method for interrupting a current flow in a DC current path14US 8,837,093 B2ABB Technology AG · 2014
- Oil-immersed and high-pressure tripping switch structure12US 7,199,686 B1Jaker Electric Co., Ltd. · 2007
- Disconnecting device with arc extinguishing5US 10,714,276 B2Auto-Kabel Management GmbH · 2020