H01H 35/32
Actuated by bellows
Official title: actuated by bellows
H01H35/32 (Actuated by bellows) appears on 33 US grants and 16 published applications in this corpus.
Search patents in H01H- Granted patents
- 33
- Published applications
- 16
- Assignees
- 24
- Inventors
- 62
- Latest grant
- 19 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 3 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 3 | 0 |
| 2017 | 0 | 1 |
| 2018 | 2 | 1 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 3 |
| 2023 | 0 | 3 |
| 2024 | 4 | 0 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Gas density relay with online self-checking function, and checking method therefor19 Aug 2025US 12,392,700 B2Shanghai Roye Electric Co., Ltd.
- Self-diagnostic gas density relay and use method thereof25 Mar 2025US 12,259,300 B2Shanghai Roye Electric Co., Ltd.
- Transformation method for gas density relay, and gas density relay having online self-check function and check method thereof5 Nov 2024US 12,136,530 B2Shanghai Roye Electric Co., Ltd.
- Gas density relay having simulation check function and simulation check method thereof1 Oct 2024US 12,105,148 B2Shanghai Roye Electric Co., Ltd.
- Electrical system with on-line sampling verification function and verification method thereof23 Jul 2024US 12,046,433 B2Shanghai Roye Electric Co., Ltd.
- Method, device, use and installation for gas density monitoring10 Apr 2025US 2025/0116588 A1Trafag AG
- Gas density relay having simulation check function and simulation check method thereof13 Jul 2023US 2023/0221370 A1Shanghai Roye Electric Co., Ltd.
- Self-diagnostic gas density relay and use method thereof1 Jun 2023US 2023/0168145 A1Shanghai Roye Electric Co., Ltd.
- Gas density relay with online self-checking function, and checking method therefor25 May 2023US 2023/0160800 A1Shanghai Roye Electric Co., Ltd.
- Transformation method for gas density relay, and gas density relay having online self-check function and check method thereof20 Oct 2022US 2022/0336170 A1Shanghai Roye Electric Co., Ltd.
Most cited
By later US patents
- Switch for sensing a selected ratio between two different pressures19US 4,006,329 AWestport Development & Mfg. Co. Inc. · 1977
- Pressure switch9US 5,069,759 ABridgestone Corporation · 1991
- Pressure switch8US 5,028,749 ABridgestone Corporation · 1991
- Circuit breaker for disconnecting an electrical apparatus from electrical network8US 6,479,780 B2ABB AB · 2002
- Pressure responsive switch7US 4,540,860 AKabushiki Kaisha Saginomiya Seisakusho · 1985