H01H 33/34
Hydraulic
Official title: hydraulic
H01H33/34 (Hydraulic) appears on 68 US grants and 27 published applications in this corpus.
Search patents in H01H- Granted patents
- 68
- Published applications
- 27
- Assignees
- 26
- Inventors
- 104
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 3 |
| 2011 | 0 | 2 |
| 2012 | 0 | 2 |
| 2013 | 2 | 2 |
| 2014 | 2 | 3 |
| 2015 | 0 | 5 |
| 2016 | 2 | 0 |
| 2017 | 6 | 0 |
| 2018 | 1 | 2 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 2 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Actuating mechanism for operating a circuit breaker23 Sep 2025US 12,424,400 B2GE Vernova Infrastructure Technology LLC
- Accumulator module for hydromechanical spring-loaded drive29 Mar 2022US 11,286,959 B2Hitachi Energy Switzerland AG
- Anomaly diagnosis device and anomaly diagnosis method for oil-hydraulic operating mechanism15 Jun 2021US 11,038,339 B2Mitsubishi Electric Corporation
- Compact pole unit for fast switches and circuit breakers16 Feb 2021US 10,923,298 B1Eaton Intelligent Power Limited
- Two-stage valve arrangement for hydraulic control of a piston- cylinder arrangement of a high- or medium-voltage power switch10 Nov 2020US 10,830,256 B2ABB Power Grids Switzerland AG
- Alternating Current Disconnector for Subsea Operation26 Mar 2026US 2026/0088234 A1ABB Schweiz AG
- Actuating mechanism for operating a circuit breaker21 Dec 2023US 2023/0411090 A1General Electric Technology GmbH
- Anomaly diagnosis device and anomaly diagnosis method for oil-hydraulic operating mechanism8 Oct 2020US 2020/0321771 A1Mitsubishi Electric Corporation
- Two-Stage Valve Arrangement for Hydraulic Control of a Piston-Cylinder Arrangement of a High- or Medium-Voltage Power Switch17 Jan 2019US 2019/0017521 A1ABB Schweiz AG
- Accumulator Module for Hydromechanical Spring-Loaded Drive27 Dec 2018US 2018/0372125 A1ABB Schweiz AG
Most cited
By later US patents
- Fluid actuating device for an electric circuit breaker15US 3,969,985 ASiemens Aktiengesellschaft · 1976
- Fluid actuating device for an electric circuit breaker14US 4,321,435 ASiemens Aktiengesellschaft · 1982
- Hydraulic drive11US 4,716,812 ABBC Aktiengesellschaft Brown, Boveri & Cie · 1988
- Electric switching device10US 5,296,662 AAsea Brown Boveri AG · 1994
- Hydraulically-activated operating system for an electric circuit breaker9US 4,166,937 AGeneral Electric Company · 1979