F04D 15/0083
Protection against sudden pressure change
Official title: {Protection against sudden pressure change, e.g. check valves}
F04D15/0083 (Protection against sudden pressure change) appears on 47 US grants and 40 published applications in this corpus.
Search patents in F04D- Granted patents
- 47
- Published applications
- 40
- Assignees
- 39
- Inventors
- 92
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 3 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 3 | 1 |
| 2013 | 1 | 1 |
| 2014 | 1 | 2 |
| 2015 | 0 | 1 |
| 2016 | 1 | 2 |
| 2017 | 3 | 2 |
| 2018 | 1 | 4 |
| 2019 | 4 | 1 |
| 2020 | 2 | 3 |
| 2021 | 1 | 3 |
| 2022 | 4 | 4 |
| 2023 | 3 | 2 |
| 2024 | 3 | 6 |
| 2025 | 3 | 2 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for providing at least one item of information relating to a hydraulic system25 Aug 2026US 12,716,433 B2KSB SE & Co. KGaA
- Safety controls for electrical submersible pump systems28 Apr 2026US 12,612,917 B1Halliburton Energy Services.Inc.
- Gas seal column apparatus with sensor column28 Oct 2025US 12,454,956 B2Gscd Corp.
- Twin pump unit casing having motor mounted touchscreens29 Jul 2025US 12,372,091 B2S. A. Armstrong Limited
- Gas seal column apparatus with sensor column14 Jan 2025US 12,196,212 B2Gscd Corp.
- Safety controls for electrical submersible pump systems30 Apr 2026US 2026/0117778 A1Halliburton Energy Services.Inc.
- Water pump control device12 Feb 2026US 2026/0043407 A1Delta Electronics, Inc.
- Twin Pump Unit Casing Having Motor Mounted Touchscreens23 Oct 2025US 2025/0327456 A1S. A. Armstrong Limited
- Gas seal column apparatus with sensor column31 Jul 2025US 2025/0243866 A1Gscd Corp.
- Gas seal column apparatus with sensor column19 Dec 2024US 2024/0418173 A1Gscd Corp.
Most cited
By later US patents
- Oscillating centrifugal pump76US 5,405,251 A1995
- Electronic pumpcontrol system64US 5,190,442 A1993
- Systems and methods for balancing thrust loads in a heat engine system53US 10,495,098 B2Echogen Power Systems, LLC · 2019
- Instantaneous hot-water delivery system41US 5,983,922 A1999
- Apparatus with improved inlet and method for transporting and metering particulate material40US 5,485,909 AStamet, Inc. · 1996