H01H 47/005
Safety control circuits therefor
Official title: {Safety control circuits therefor, e.g. chain of relays mutually monitoring each other}
H01H47/005 (Safety control circuits therefor) appears on 61 US grants and 57 published applications in this corpus.
Search patents in H01H- Granted patents
- 61
- Published applications
- 57
- Assignees
- 49
- Inventors
- 126
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 2 |
| 2003 | 2 | 2 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 2 |
| 2009 | 1 | 3 |
| 2010 | 0 | 0 |
| 2011 | 3 | 1 |
| 2012 | 1 | 2 |
| 2013 | 0 | 3 |
| 2014 | 3 | 2 |
| 2015 | 1 | 4 |
| 2016 | 2 | 0 |
| 2017 | 2 | 1 |
| 2018 | 2 | 5 |
| 2019 | 2 | 5 |
| 2020 | 3 | 6 |
| 2021 | 10 | 4 |
| 2022 | 0 | 3 |
| 2023 | 5 | 5 |
| 2024 | 3 | 1 |
| 2025 | 4 | 1 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Relay apparatus and safety switching device with relay apparatus30 Sep 2025US 12,431,308 B2Pilz GmbH & Co.KG
- Fault detection and automatic switching of relays5 Aug 2025US 12,381,557 B1Forsyth Robotics LLC
- Relay control apparatus, battery pack and electric vehicle29 Jul 2025US 12,370,894 B2LG Energy Solution, Ltd.
- Systems and methods for detecting welded contacts in a switch system1 Jul 2025US 12,347,636 B2Rockwell Automation Technologies, Inc.
- Control circuit for contactor and its control method1 Oct 2024US 12,106,915 B2Schneider Electric Industries SAS
- Power supply device13 Aug 2026US 2026/0233616 A1Toyota Jidosha Kabushiki Kaisha
- Power supply switching device23 Jul 2026US 2026/0213101 A1OMRON Corporation
- Monitoring circuit for redundant relays14 May 2026US 2026/0133251 A1Pepperl + Fuchs GmbH
- Relay Control Apparatus, Battery Pack and Electric Vehicle8 Jan 2026US 2026/0008348 A1LG Energy Solution, Ltd.
- Fault detection and automatic switching of relays30 Oct 2025US 2025/0337413 A1Forsyth Robotics LLC
Most cited
By later US patents
- Fail-safe automatic sliding operation control apparatus for press17US 6,047,634 AThe Nippon Signal Co., Ltd. · 2000
- Redundant control relay circuits14US 5,689,398 AAllen-Bradley Company, Inc. · 1997
- Power switching system14US 6,297,569 B1Honeywell International Inc. · 2001
- Self-checking interlock control system9US 5,281,857 ASquare D Company · 1994
- Load drive circuit9US 6,034,449 AThe Nippon Signal Co., Ltd. · 2000