H01H 2009/267
With interlocking of two out of three switches
Official title: {with interlocking of two out of three switches, e.g. two switches each connecting a power supply to a busbar and a bus coupling switch interlocked in such a way that the power supplies are never connected in parallel}
H01H2009/267 (With interlocking of two out of three switches) appears on 10 US grants and 3 published applications in this corpus.
Search patents in H01H- Granted patents
- 10
- Published applications
- 3
- Assignees
- 7
- Inventors
- 16
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Three-phase arc quenching device with two pistons21 Oct 2025US 12,451,302 B2ABB Schweiz AG
- Interlock apparatus for three circuit breakers7 Apr 2020US 10,614,973 B2Lsis Co., Ltd.
- Set of circuit breakers with interlock means7 Aug 2012US 8,237,070 B2Zhejiang Chint Electrics Co., Ltd.
- Four-way interlock system and bypass transfer switch employing the same7 Feb 2006US 6,995,327 B1Eaton Corporation
- Mechanical and gate for interlocking electric power switches and distribution system incorporating same14 May 2002US 6,388,214 B1Eaton Corporation
Most cited
By later US patents
- Four-way interlock system and bypass transfer switch employing the same30US 6,995,327 B1Eaton Corporation · 2006
- Five gear isolating mechanism for bypass isolation switches17US 5,200,586 AWestinghouse Electric Corp. · 1993
- Power switch mutually locking arrangement12US 5,847,340 ASiemens Aktiengesellschaft · 1998
- Mechanical and gate for interlocking electric power switches and distribution system incorporating same7US 6,388,214 B1Eaton Corporation · 2002
- Device for mutually locking the actuation of at least two power switches5US 5,895,898 ASiemens Aktiengesellschaft · 1999