F16K 31/122
The fluid acting on a piston
Official title: the fluid acting on a piston (F16K31/143, F16K31/163, F16K31/363, F16K31/383 take precedence)
F16K31/122 (The fluid acting on a piston) appears on 1,743 US grants and 1,733 published applications in this corpus.
Search patents in F16K- Granted patents
- 1,743
- Published applications
- 1,733
- Assignees
- 907
- Inventors
- 3,046
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 13 | 0 |
| 1978 | 13 | 0 |
| 1979 | 8 | 0 |
| 1980 | 19 | 0 |
| 1981 | 15 | 0 |
| 1982 | 7 | 0 |
| 1983 | 6 | 0 |
| 1984 | 13 | 0 |
| 1985 | 17 | 0 |
| 1986 | 14 | 0 |
| 1987 | 14 | 0 |
| 1988 | 11 | 0 |
| 1989 | 21 | 0 |
| 1990 | 10 | 0 |
| 1991 | 10 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 7 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 11 | 0 |
| 1999 | 21 | 0 |
| 2000 | 31 | 0 |
| 2001 | 27 | 16 |
| 2002 | 21 | 32 |
| 2003 | 33 | 23 |
| 2004 | 23 | 37 |
| 2005 | 18 | 26 |
| 2006 | 28 | 32 |
| 2007 | 18 | 32 |
| 2008 | 16 | 28 |
| 2009 | 15 | 26 |
| 2010 | 20 | 42 |
| 2011 | 18 | 38 |
| 2012 | 30 | 32 |
| 2013 | 28 | 63 |
| 2014 | 46 | 73 |
| 2015 | 60 | 94 |
| 2016 | 77 | 118 |
| 2017 | 91 | 132 |
| 2018 | 99 | 130 |
| 2019 | 139 | 132 |
| 2020 | 117 | 141 |
| 2021 | 125 | 111 |
| 2022 | 105 | 88 |
| 2023 | 82 | 92 |
| 2024 | 103 | 80 |
| 2025 | 67 | 76 |
| 2026 | 44 | 39 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- High-pressure fluid on/off valve and components and method of use of same29 Sep 2026US 12,747,803 B2Flow International Corporation
- Pneumatic actuator assembly for reduced dead leg15 Sep 2026US 12,736,151 B2Repligen Corporation
- Air valve of tire bead seater8 Sep 2026US 12,728,677 B2Guangzhou Xiangwei Automotive Equipment Co., LTD
- Fluid device8 Sep 2026US 12,729,770 B2Surpass Industry Co., Ltd.
- Modular system and method of manufacturing valves, assembly, and valve8 Sep 2026US 12,729,775 B2Buerkert Werke GmbH
- Electric bleed off valve assembly8 Oct 2026US 2026/0309251 A1FMC Technologies, Inc.
- Improvements in, or relating to valves and methods therefor24 Sep 2026US 2026/0287081 A1
- Malfunction prevention valve and nuclear equipment comprising same24 Sep 2026US 2026/0290634 A1Korea Atomic Energy Research Institute
- Pneumatic drain valve driving device17 Sep 2026US 2026/0275694 A1Kohler (China) Investment Co., Ltd.
- Fail-safe hydraulic linear actuator3 Sep 2026US 2026/0258881 A1Sayatva, LLC
Most cited
By later US patents
- Bellows driver slot valve587US 5,975,492 A1999
- Film processing system434US 6,296,711 B1CVD Systems, Inc. · 2001
- Integrated process control valve106US 5,251,148 AValtek, Inc. · 1993
- Safety shut-off valve98US 3,958,592 AWillis Oil Tool Co. · 1976
- Rotatable ball valve apparatus and method98US 4,681,133 AHydril Company · 1987