H01H 9/28
For locking switch parts by a key or equivalent removable member
Official title: for locking switch parts by a key or equivalent removable member (switches operated by a key H01H27/00; locking by removable part of two-part coupling device H01R)
H01H9/28 (For locking switch parts by a key or equivalent removable member) appears on 583 US grants and 417 published applications in this corpus.
Search patents in H01H- Granted patents
- 583
- Published applications
- 417
- Assignees
- 244
- Inventors
- 1,019
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 8 | 0 |
| 1993 | 15 | 0 |
| 1994 | 15 | 0 |
| 1995 | 12 | 0 |
| 1996 | 9 | 0 |
| 1997 | 8 | 0 |
| 1998 | 24 | 0 |
| 1999 | 14 | 0 |
| 2000 | 5 | 0 |
| 2001 | 14 | 2 |
| 2002 | 14 | 9 |
| 2003 | 10 | 12 |
| 2004 | 15 | 11 |
| 2005 | 11 | 4 |
| 2006 | 8 | 14 |
| 2007 | 7 | 14 |
| 2008 | 23 | 13 |
| 2009 | 5 | 11 |
| 2010 | 3 | 9 |
| 2011 | 10 | 14 |
| 2012 | 8 | 11 |
| 2013 | 8 | 16 |
| 2014 | 14 | 25 |
| 2015 | 30 | 26 |
| 2016 | 15 | 24 |
| 2017 | 20 | 27 |
| 2018 | 31 | 20 |
| 2019 | 29 | 26 |
| 2020 | 18 | 26 |
| 2021 | 26 | 30 |
| 2022 | 30 | 13 |
| 2023 | 24 | 25 |
| 2024 | 18 | 15 |
| 2025 | 15 | 11 |
| 2026 | 11 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01H 9/281Making use of a padlock285
- H01H 9/287Wherein the operating part is made inaccessible or more difficult to access155
- H01H 9/286Making use of a removable locking part acting directly on the operating90
- H01H 9/285Locking mechanisms incorporated in the switch assembly and operable by a key47
- H01H 2009/288Provisions relating to welded contactsIndexing code20
Recent patents
- Retrofit remote control devices18 Aug 2026US 12,712,137 B2Lutron Technology Company LLC
- Handle lock device of circuit breaker21 Jul 2026US 12,688,982 B2Fuji Electric Fa Components & Systems Co., Ltd.
- Device for locking an assembly, and system for locking different assemblies14 Jul 2026US 12,683,096 B2Siemens Aktiengesellschaft
- Retrofit remote control device9 Jun 2026US 12,651,525 B2Lutron Technology Company LLC
- Handle lock device for circuit breaker2 Jun 2026US 12,646,663 B2Fuji Electric Fa Components & Systems Co., Ltd.
- Circuit breaker operation safety lockout device10 Sep 2026US 2026/0269148 A1
- Locking device for a rocker-type light switch13 Aug 2026US 2026/0237573 A1Toggle Shield LLC
- Hermetically sealed manual disconnect with integrated bellows actuator21 May 2026US 2026/0142095 A1Rincon Power, LLC
- Lockout/tagout system and method including multi-user lockout device with electronic locking and wireless control interface14 May 2026US 2026/0134730 A1Eaton Intelligent Power Limited
- Self-adjusting frame for mounting over a wall-mounted electrical device14 May 2026US 2026/0135047 A1Lutron Technology Company LLC
Most cited
By later US patents
- Lockout disabling mechanism1,030US 10,194,976 B2Ethicon, Inc. · 2019
- Adapter assemblies for interconnecting surgical loading units and handle assemblies848US 10,163,589 B2Covidien LP · 2018
- Switch cover and control for controllable lamp153US 9,208,965 B2Centralite Systems, Inc. · 2015
- Circuit breaker with remote control and disconnection function120US 5,477,016 AMerlin Gerin · 1995
- Electric switch in which the control lever travel is arrested if the contacts become welded together101US 4,546,224 ASACE S.p.A. Costruzioni Elettromeccaniche · 1985