H01H 2033/907
Using tandem pistons
Official title: {using tandem pistons, e.g. several compression volumes being modified in conjunction or sequential}
H01H2033/907 (Using tandem pistons) appears on 12 US grants and 6 published applications in this corpus.
Search patents in H01H- Granted patents
- 12
- Published applications
- 6
- Assignees
- 10
- Inventors
- 20
- Latest grant
- 3 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 2 | 3 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Compressed gas switch3 Jun 2025US 12,322,935 B2Siemens Energy Global GmbH & Co. KG
- Arc extinguishing contact assembly for a circuit breaker assembly13 Jun 2017US 9,679,719 B2Eaton Corporation
- Arc extinguishing contact assembly for a circuit breaker assembly17 May 2016US 9,343,252 B2Eaton Corporation
- Arc extinguishing contact assembly for a circuit breaker assembly5 Apr 2016US 9,305,726 B2Eaton Corporation
- Interrupting chamber having two compression chambers21 Jun 2011US 7,964,816 B2Areva T&T SA
- High voltage circuit-breaker30 Apr 2026US 2026/0120986 A1Hitachi Energy Ltd
- Compressed gas switch29 Feb 2024US 2024/0072522 A1Siemens Energy Global GmbH & Co. KG
- Arc extinguishing contact assembly for a circuit breaker assembly2 Jun 2016US 2016/0155586 A1Eaton Corporation
- Arc extinguishing contact assembly for a circuit breaker assembly3 Mar 2016US 2016/0064169 A1Eaton Corporation
- Arc extinguishing contact assembly for a circuit breaker assembly3 Mar 2016US 2016/0064170 A1Eaton Corporation
Most cited
By later US patents
- Dual-compression gas-blast puffer-type interrupting device11US 4,163,131 AWestinghouse Electric Corp. · 1979
- Power circuit-breaker11US 5,898,149 AAsea Brown Boveri AG · 1999
- Dual compression puffer interrupter10US 3,991,292 AWestinghouse Electric Corp. · 1976
- Electric switch with two quenching nozzles having an improved quenching medium flow7US 4,450,330 ASiemens Aktiengesellschaft · 1984
- Circuit interrupter5US 4,445,020 AMitsubishi Denki Kabushiki Kaisha · 1984