F16K 31/0693
Pressure equilibration of the armature
Official title: {Pressure equilibration of the armature}
F16K31/0693 (Pressure equilibration of the armature) appears on 314 US grants and 291 published applications in this corpus.
Search patents in F16K- Granted patents
- 314
- Published applications
- 291
- Assignees
- 193
- Inventors
- 748
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 8 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 6 | 0 |
| 2001 | 6 | 1 |
| 2002 | 5 | 4 |
| 2003 | 6 | 5 |
| 2004 | 5 | 18 |
| 2005 | 10 | 9 |
| 2006 | 9 | 9 |
| 2007 | 6 | 9 |
| 2008 | 3 | 7 |
| 2009 | 4 | 12 |
| 2010 | 5 | 9 |
| 2011 | 4 | 9 |
| 2012 | 7 | 14 |
| 2013 | 14 | 12 |
| 2014 | 10 | 6 |
| 2015 | 14 | 14 |
| 2016 | 9 | 17 |
| 2017 | 9 | 10 |
| 2018 | 17 | 18 |
| 2019 | 12 | 20 |
| 2020 | 16 | 19 |
| 2021 | 21 | 22 |
| 2022 | 18 | 20 |
| 2023 | 10 | 20 |
| 2024 | 15 | 2 |
| 2025 | 12 | 3 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Hydraulic system for working machine, working machine, and method of controlling working machine26 Mar 2026US 2026/0085496 A1Kubota Corporation
- Valve assembly27 Nov 2025US 2025/0361942 A1Jtekt Corporation
- Valve5 Jun 2025US 2025/0180141 A1Weir Minerals Netherlands B.V.
- Improved double safety valve2 Jan 2025US 2025/0003502 A1ESA, Inc.
Most cited
By later US patents
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- Automotive air conditioning system including electrically operated expansion valve77US 4,632,358 AEaton Corporation · 1986
- Proportional flow valve67US 4,921,208 AAutomatic Switch Company · 1990
- Control valve for a hydraulic control unit of vehicular brake systems44US 6,065,734 AKelsey-Hayes Company · 2000