F16K 17/044
With more than one spring
Official title: {with more than one spring}
F16K17/044 (With more than one spring) appears on 138 US grants and 121 published applications in this corpus.
Search patents in F16K- Granted patents
- 138
- Published applications
- 121
- Assignees
- 121
- Inventors
- 285
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 4 |
| 2006 | 3 | 1 |
| 2007 | 4 | 2 |
| 2008 | 1 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 2 |
| 2011 | 0 | 6 |
| 2012 | 3 | 3 |
| 2013 | 3 | 6 |
| 2014 | 2 | 7 |
| 2015 | 5 | 4 |
| 2016 | 10 | 7 |
| 2017 | 14 | 9 |
| 2018 | 6 | 9 |
| 2019 | 12 | 15 |
| 2020 | 9 | 13 |
| 2021 | 12 | 5 |
| 2022 | 8 | 3 |
| 2023 | 5 | 5 |
| 2024 | 5 | 8 |
| 2025 | 5 | 5 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Electromagnetically actuated pressure relief valve for fracturing systems9 Jun 2026US 12,650,179 B2
- Pressure relief valve assembly including series coupled valves and related methods25 Nov 2025US 12,480,589 B2PREVCO Subsea LLC
- Multi-function valve assemblies19 Aug 2025US 12,392,417 B2Ford Global Technologies, LLC
- Fluid control valve15 Apr 2025US 12,276,346 B2Eagle Industry Co., Ltd.
- Pressure regulator14 May 2026US 2026/0132860 A1Eaton Intelligent Power Limited
- Spring assemblies for pressure relief valves26 Mar 2026US 2026/0085764 A1
- Overpressure relief device for switchgear5 Feb 2026US 2026/0039098 A1GE Vernova Infrastructure Technology LLC
- Pressure equalization apparatus27 Nov 2025US 2025/0361945 A1Carl Freudenberg KG
- Multi-function valve assemblies6 Nov 2025US 2025/0341260 A1Ford Global Technologies, LLC
Most cited
By later US patents
- Flexured shaft poppet37US 5,577,533 A1996
- Fluid controller with diaphragm and piston32US 4,424,738 AAir-Dry Corporation · 1984
- Differential pressure valve with parallel biasing springs and method for reducing spring surge27US 9,297,373 B2Nuovo Pignone S.p.A. · 2016
- Pressure relief device for vessels23US 4,674,530 AAnderson, Greenwood & Co. · 1987
- Valve apparatus for deep drilling21US 4,072,166 A1978