H01H 35/24
Switches operated by change of fluid pressure, by fluid pressure waves, or
Official title: Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow (wherein the change of pressure is caused by change of temperature H01H37/36)
H01H35/24 (Switches operated by change of fluid pressure, by fluid pressure waves, or) appears on 951 US grants and 309 published applications in this corpus.
Search patents in H01H- Granted patents
- 951
- Published applications
- 309
- Assignees
- 453
- Inventors
- 1,330
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 31 | 0 |
| 1977 | 21 | 0 |
| 1978 | 35 | 0 |
| 1979 | 17 | 0 |
| 1980 | 29 | 0 |
| 1981 | 34 | 0 |
| 1982 | 28 | 0 |
| 1983 | 13 | 0 |
| 1984 | 30 | 0 |
| 1985 | 31 | 0 |
| 1986 | 25 | 0 |
| 1987 | 30 | 0 |
| 1988 | 34 | 0 |
| 1989 | 30 | 0 |
| 1990 | 29 | 0 |
| 1991 | 25 | 0 |
| 1992 | 39 | 0 |
| 1993 | 22 | 0 |
| 1994 | 29 | 0 |
| 1995 | 15 | 0 |
| 1996 | 17 | 0 |
| 1997 | 14 | 0 |
| 1998 | 15 | 0 |
| 1999 | 17 | 0 |
| 2000 | 13 | 0 |
| 2001 | 13 | 0 |
| 2002 | 14 | 6 |
| 2003 | 17 | 6 |
| 2004 | 6 | 3 |
| 2005 | 4 | 9 |
| 2006 | 12 | 13 |
| 2007 | 10 | 12 |
| 2008 | 14 | 9 |
| 2009 | 7 | 21 |
| 2010 | 15 | 17 |
| 2011 | 11 | 20 |
| 2012 | 17 | 17 |
| 2013 | 14 | 15 |
| 2014 | 12 | 9 |
| 2015 | 14 | 16 |
| 2016 | 18 | 20 |
| 2017 | 15 | 16 |
| 2018 | 25 | 17 |
| 2019 | 16 | 13 |
| 2020 | 14 | 15 |
| 2021 | 14 | 10 |
| 2022 | 10 | 15 |
| 2023 | 8 | 12 |
| 2024 | 14 | 8 |
| 2025 | 12 | 6 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- H01H 35/26Details385
- H01H 35/34Actuated by diaphragm372
- H01H 35/40Actuated by devices allowing continual flow of fluid119
- H01H 35/38Actuated by piston and cylinder108
- H01H 35/32Actuated by bellows33
- H01H 35/245Actuated by the deformation of a body of elastic material22
- H01H 35/247The switch being of the reed switch type15
- H01H 35/36Actuated by curled flexible tube11
All 9 subgroupsShow fewer
Recent patents
- Multi-mode air compressor pressure power switch11 Aug 2026US 12,706,262 B2Transform Sr Brands LLC
- Sensor assemblies utilizing a one-piece thermal isolated fitting tube and methods of assembling the same16 Jun 2026US 12,658,388 B2Sensata Technologies, Inc.
- Pressure switch with two pressing members and a hermetic electric compressor arrangement therewith25 Nov 2025US 12,480,486 B2Ubukata Industries Co., Ltd.
- Two wire pressure indicating switch with all electronic architecture with millivolt operating supply25 Nov 2025US 12,482,619 B2Hydra-Electric Company
- Insulating fluid monitoring block and mounting method18 Nov 2025US 12,474,247 B2Siemens Energy Global GmbH & Co. KG
- Simulation verification method and apparatus for gas density relay27 Aug 2026US 2026/0251713 A1Shanghai Roye Electric Co., Ltd.
- Welding-type systems using fluid sensors with bond resisting substances27 Aug 2026US 2026/0255500 A1Illinois Tool Works Inc.
- Pneumatically-controlled rf switch5 Mar 2026US 2026/0066200 A1
- Safety pressure switch5 Mar 2026US 2026/0066201 A1ASM IP Holding B. V.
- Furnace Diagnostic By-Pass Apparatus27 Nov 2025US 2025/0364197 A1
Most cited
By later US patents
- Biomedical pressure transducer238US 4,869,265 AWestern Clinical Engineering Ltd. · 1989
- Micromachined threshold pressure switch and method of manufacture151US 5,164,558 AMassachusetts Institute of Technology · 1992
- Features of a condition responsive switch130US 4,581,509 ATexas Instruments Incorporated · 1986
- Tourniquet for sensing and regulation of applied pressure128US 5,181,522 AAbatis Medical Technologies Limited · 1993
- Fluid control valve and system with leak detection and containment119US 4,901,751 ASystems Chemistry, Inc. · 1990