F15B 21/12
Fluid oscillators or pulse generators
F15B21/12 (Fluid oscillators or pulse generators) appears on 117 US grants and 100 published applications in this corpus.
Search patents in F15B- Granted patents
- 117
- Published applications
- 100
- Assignees
- 86
- Inventors
- 210
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 2 |
| 2004 | 2 | 0 |
| 2005 | 4 | 2 |
| 2006 | 0 | 10 |
| 2007 | 8 | 1 |
| 2008 | 1 | 6 |
| 2009 | 2 | 4 |
| 2010 | 1 | 4 |
| 2011 | 4 | 3 |
| 2012 | 3 | 2 |
| 2013 | 0 | 5 |
| 2014 | 4 | 12 |
| 2015 | 8 | 6 |
| 2016 | 6 | 5 |
| 2017 | 5 | 6 |
| 2018 | 12 | 8 |
| 2019 | 6 | 3 |
| 2020 | 5 | 3 |
| 2021 | 4 | 4 |
| 2022 | 4 | 5 |
| 2023 | 1 | 2 |
| 2024 | 2 | 1 |
| 2025 | 3 | 2 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and system for transferring hydraulic power between a pump and an actuator15 Sep 2026US 12,736,071 B2Allu Innovation and Research Center Oy
- Fluid circuit for intermittent air discharge18 Nov 2025US 12,473,932 B2SMC Corporation
- Fluidic oscilators29 Jul 2025US 12,370,506 B2Perlemax Limited
- High-pressure fluid discharge device20 May 2025US 12,305,674 B2SMC Corporation
- Tail-rotor vibration dampener system29 Oct 2024US 12,129,021 B2The Boeing Company
- Wave amplifier for impact devices20 Aug 2026US 2026/0243282 A1Mississippi State University
- Method and system for transferring hydraulic power between a pump and an actuator6 Aug 2026US 2026/0226926 A1Allu Innovation and Research Center Oy
- Tail-rotor vibration dampener system23 Apr 2026US 2026/0109450 A1The Boeing Company
- Oscillating flow controller18 Sep 2025US 2025/0291369 A1
- Household appliance apparatus5 Jun 2025US 2025/0178002 A1LIXIL Corporation
Most cited
By later US patents
- Apparatus for creating pulsating fluid flow95US 6,976,507 B1Halliburton Energy Services.Inc. · 2005
- Pressure operated pulsatile fluid flow device48US 4,489,750 ADavol Inc. · 1984
- Cold-performance fluidic oscillator48US 7,267,290 B2Bowles Fluidics Corporation · 2007
- Valve assembly with low resistance pilot shifting34US 8,167,586 B2Ingersoll-Rand Company · 2012
- Low inertia servo valve31US 5,467,800 AAtlas Fluid Controls Inc. · 1995