H01H 3/001
Means for preventing or breaking contact-welding
Official title: {Means for preventing or breaking contact-welding}
H01H3/001 (Means for preventing or breaking contact-welding) appears on 243 US grants and 116 published applications in this corpus.
Search patents in H01H- Granted patents
- 243
- Published applications
- 116
- Assignees
- 155
- Inventors
- 452
- Latest grant
- 30 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 5 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 10 | 0 |
| 1987 | 9 | 0 |
| 1988 | 6 | 0 |
| 1989 | 6 | 0 |
| 1990 | 11 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 8 | 0 |
| 1995 | 7 | 0 |
| 1996 | 7 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 10 | 0 |
| 2001 | 1 | 0 |
| 2002 | 8 | 5 |
| 2003 | 4 | 4 |
| 2004 | 4 | 1 |
| 2005 | 2 | 3 |
| 2006 | 3 | 6 |
| 2007 | 4 | 3 |
| 2008 | 5 | 8 |
| 2009 | 2 | 3 |
| 2010 | 3 | 8 |
| 2011 | 7 | 3 |
| 2012 | 3 | 4 |
| 2013 | 5 | 5 |
| 2014 | 6 | 4 |
| 2015 | 6 | 12 |
| 2016 | 6 | 8 |
| 2017 | 6 | 2 |
| 2018 | 4 | 7 |
| 2019 | 5 | 6 |
| 2020 | 5 | 4 |
| 2021 | 8 | 4 |
| 2022 | 3 | 4 |
| 2023 | 4 | 4 |
| 2024 | 3 | 5 |
| 2025 | 4 | 3 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Circuit breaker30 Dec 2025US 12,512,279 B2Siemens Aktiengesellschaft
- Detecting welded relay contacts using spanner voltage measurement4 Nov 2025US 12,461,156 B2Rockwell Automation Technologies, Inc.
- Relay control device and method of controlling relay control device17 Jun 2025US 12,334,289 B2Hitachi Astemo, Ltd.
- Solenoid driver for a circuit breaker13 May 2025US 12,300,452 B2Eaton Intelligent Power Limited
- Electrified vehicle high voltage contactor control29 Oct 2024US 12,128,774 B2Ford Global Technologies, LLC
- Direct current switch and power converter27 Nov 2025US 2025/0364195 A1Huawei Digital Power Technologies Co., Ltd.
- Monitoring Electrical Contactor Health5 Jun 2025US 2025/0180647 A1Caterpillar Inc.
- Switch incorporating equipotentially connected contacts and method for operating a switch15 May 2025US 2025/0157748 A1Gorlan Team, S. L. U
- Detecting welded relay contacts using spanner voltage measurement26 Dec 2024US 2024/0426915 A1Rockwell Automation Technologies, Inc.
- Circuit breaker21 Nov 2024US 2024/0387120 A1Siemens Aktiengesellschaft
Most cited
By later US patents
- Welded contact safety technique74US 4,698,978 AUHR Corporation · 1987
- Protection device with a contact breaker mechanism62US 6,958,895 B1Pass & Seymour, Inc. · 2005
- Motor protector device54US 5,995,351 ATexas Instruments Incorporated · 1999
- Weld-free contact system for electromagnetic contactors50US 6,377,143 B1Eaton Corporation · 2002
- Sealed relay device40US 5,519,370 AKilovac Corporation · 1996