H01H 3/3052
Linear spring motors
Official title: {Linear spring motors}
H01H3/3052 (Linear spring motors) appears on 56 US grants and 48 published applications in this corpus.
Search patents in H01H- Granted patents
- 56
- Published applications
- 48
- Assignees
- 31
- Inventors
- 151
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 2 |
| 2005 | 2 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 3 |
| 2010 | 4 | 1 |
| 2011 | 1 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 3 |
| 2014 | 3 | 4 |
| 2015 | 0 | 5 |
| 2016 | 6 | 3 |
| 2017 | 6 | 2 |
| 2018 | 1 | 4 |
| 2019 | 5 | 3 |
| 2020 | 3 | 2 |
| 2021 | 2 | 0 |
| 2022 | 1 | 2 |
| 2023 | 0 | 1 |
| 2024 | 1 | 4 |
| 2025 | 3 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rapid safety switch and rapid safety switch system14 Jul 2026US 12,683,103 B2Siemens Aktiengesellschaft
- Electric switching device with improved actuation mechanism2 Jun 2026US 12,646,674 B2Eaton Intelligent Power Limited
- Operating mechanism for circuit breakers16 Dec 2025US 12,500,052 B2Hitachi Energy Ltd
- Fault detection in spring-loaded drives of medium-voltage switchgear systems17 Jun 2025US 12,334,283 B2Siemens Aktiengesellschaft
- High energy spring drive20 May 2025US 12,308,186 B2Hitachi Energy Ltd
- Operating mechanism for a switchgear device8 Jan 2026US 2026/0011513 A1Hitachi Energy Ltd
- Process for detection of degradation of a switching device comprising an electromagnetic actuator16 Jan 2025US 2025/0020720 A1Schneider Electric Industries SAS
- Process for detecting degradation of a switching device16 Jan 2025US 2025/0022669 A1Schneider Electric Industries SAS
- High energy spring drive19 Dec 2024US 2024/0420900 A1Hitachi Energy Ltd
- Electric switching device with improved actuation mechanism19 Sep 2024US 2024/0312751 A1Eaton Intelligent Power Limited
Most cited
By later US patents
- Linear snap action operating mechanism and an electrical switch incorporating same28US 5,006,682 AWestinghouse Electric Corp. · 1991
- Spring-driven mechanism for rectilinear displacement circuit breaker14US 6,917,006 B2Areva T&D SA · 2005
- High voltage circuit interrupting device operating mechanism including trip latch assembly13US 5,508,487 AABB Power T&D Company Inc. · 1996
- Energy storage device with zero latching force10US 4,841,788 AAlsthom · 1989
- Operating mechanism for a circuit-breaker, and a circuit-breaker fitted with the mechanism9US 4,678,877 AAlsthom · 1987