F16K 31/383
The fluid acting on a piston
Official title: the fluid acting on a piston
F16K31/383 (The fluid acting on a piston) appears on 161 US grants and 136 published applications in this corpus.
Search patents in F16K- Granted patents
- 161
- Published applications
- 136
- Assignees
- 119
- Inventors
- 274
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 2 |
| 2003 | 4 | 8 |
| 2004 | 4 | 7 |
| 2005 | 8 | 7 |
| 2006 | 5 | 7 |
| 2007 | 4 | 6 |
| 2008 | 2 | 1 |
| 2009 | 2 | 4 |
| 2010 | 2 | 0 |
| 2011 | 2 | 4 |
| 2012 | 2 | 7 |
| 2013 | 2 | 8 |
| 2014 | 3 | 5 |
| 2015 | 4 | 6 |
| 2016 | 5 | 7 |
| 2017 | 9 | 6 |
| 2018 | 2 | 10 |
| 2019 | 8 | 10 |
| 2020 | 9 | 5 |
| 2021 | 10 | 4 |
| 2022 | 7 | 9 |
| 2023 | 7 | 3 |
| 2024 | 4 | 4 |
| 2025 | 6 | 6 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System for adjusting rate of spool centering in a pilot-controlled hydraulic spool valve2 Jun 2026US 12,644,535 B2Barko Hydraulics, LLC
- Circulation valve and air conditioner26 May 2026US 12,638,088 B2Carrier Corporation
- Instant on-off valves for high pressure fluids6 Jan 2026US 12,516,745 B2
- Valve system for air gun25 Nov 2025US 12,480,738 B2Umarex USA, Inc.
- Valve7 Oct 2025US 12,435,795 B2Eugen Seitz AG
- Fluid control valve with replaceable trim cartridge7 Aug 2025US 2025/0251054 A1Control Components, Inc.
- Frequency-sensitive shock absorber and valve assembly employed thereto24 Jul 2025US 2025/0237286 A1Hl Mando Corporation
- Circulation valve and air conditioner20 Mar 2025US 2025/0092955 A1Guangdong Carrier Hvac Co., Ltd.
- Hydraulic valve spool through which a fluid can flow, bidirectional control valve, and method27 Feb 2025US 2025/0067351 A1ETO Magnetic GmbH
- Instant on-off valves for high pressure fluids30 Jan 2025US 2025/0035233 A1
Most cited
By later US patents
- Method and apparatus for using a high-pressure fluid jet97US 5,524,821 AJetec Company · 1996
- Multi-operation discharge control device78US 6,019,343 A2000
- Flushometer piston77US 5,881,993 ASloan Valve Company · 1999
- Flush valve improvements for controlling flushing volume63US 5,415,374 ASloan Valve Company · 1995
- Instant on-off valve for high-pressure fluids61US 5,297,777 AJetec Company · 1994