H01H 33/30
Using fluid actuator
Official title: using fluid actuator
H01H33/30 (Using fluid actuator) appears on 127 US grants and 62 published applications in this corpus.
Search patents in H01H- Granted patents
- 127
- Published applications
- 62
- Assignees
- 54
- Inventors
- 218
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 7 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 6 |
| 2004 | 2 | 1 |
| 2005 | 5 | 1 |
| 2006 | 0 | 2 |
| 2007 | 1 | 0 |
| 2008 | 1 | 1 |
| 2009 | 2 | 1 |
| 2010 | 1 | 3 |
| 2011 | 0 | 2 |
| 2012 | 0 | 3 |
| 2013 | 2 | 5 |
| 2014 | 3 | 8 |
| 2015 | 6 | 7 |
| 2016 | 4 | 0 |
| 2017 | 7 | 0 |
| 2018 | 1 | 5 |
| 2019 | 4 | 4 |
| 2020 | 5 | 5 |
| 2021 | 4 | 0 |
| 2022 | 1 | 2 |
| 2023 | 2 | 2 |
| 2024 | 0 | 2 |
| 2025 | 2 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01H 33/34Hydraulic68
- H01H 33/32Pneumatic34
- H01H 2033/308Comprising control and pilot valvesIndexing code17
- H01H 2033/306Monitoring the pressure of the working fluidIndexing code14
- H01H 33/304Working fluid supplies8
- H01H 33/302For fluid insulated switchgear, wherein the insulating fluid is also the working6
Recent patents
- Actuating mechanism for operating a circuit breaker23 Sep 2025US 12,424,400 B2GE Vernova Infrastructure Technology LLC
- Switch assembly for valve actuator8 Apr 2025US 12,270,487 B2Automatic Switch Company
- Arc extinguishing systems5 Dec 2023US 11,837,420 B2Siemens Aktiengesellschaft
- Switch assembly for valve actuator3 Jan 2023US 11,543,047 B2Automatic Switch Company
- Accumulator module for hydromechanical spring-loaded drive29 Mar 2022US 11,286,959 B2Hitachi Energy Switzerland AG
- Alternating Current Disconnector for Subsea Operation26 Mar 2026US 2026/0088234 A1ABB Schweiz AG
- High voltage circuit breaker with particle trap5 Dec 2024US 2024/0404773 A1Hitachi Energy Ltd
- Manipulator for gas-insulated switchgear12 Sep 2024US 2024/0304405 A1Hyosung Heavy Industries Corporation
- Actuating mechanism for operating a circuit breaker21 Dec 2023US 2023/0411090 A1General Electric Technology GmbH
- Switch assembly for valve actuator8 Jun 2023US 2023/0175607 A1Automatic Switch Company
Most cited
By later US patents
- Gas insulated high-voltage circuit breaker with pneumatic operating mechanism84US 5,187,339 AMerlin Gerin · 1993
- Electrical switchgear18US 4,513,208 ATokyo Shibaura Denki Kabushiki Kaisha · 1985
- Poletop switch automation system16US 5,534,858 ASystem Analysis & Integration, Inc. · 1996
- High current high voltage switch structure with conductive piston15US 3,941,957 A1976
- Fluid actuating device for an electric circuit breaker15US 3,969,985 ASiemens Aktiengesellschaft · 1976