F16N 2280/04
Variable-flow or proportional valves
F16N2280/04 (Variable-flow or proportional valves) appears on 15 US grants and 12 published applications in this corpus.
Search patents in F16N- Granted patents
- 15
- Published applications
- 12
- Assignees
- 14
- Inventors
- 36
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 4 |
| 2019 | 0 | 2 |
| 2020 | 5 | 2 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 2 | 1 |
| 2025 | 2 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Lubricant filter system, aircraft engine, and method of operating a lubricant system19 May 2026US 12,631,133 B2Pratt & Whitney Canada Corp.
- Lubricant flow control management for saw guides11 Nov 2025US 12,465,984 B2Precision Guide Machinery and Repair Limited
- Gas turbine engine oil flow control system8 Apr 2025US 12,270,337 B1General Electric Company
- Oil delivery system architecture24 Sep 2024US 12,098,674 B2GE Avio S. r. l.
- Device and method for dispensing a friction-coefficient-optimizing mixture12 Mar 2024US 11,926,350 B2Nowe GmbH
- Lubricant filter system, aircraft engine, and method of operating a lubricant system3 Apr 2025US 2025/0109701 A1Pratt & Whitney Candada Corp.
- Cartridge injector and manifold2 Jan 2025US 2025/0003550 A1Graco Minnesota Inc.
- Oil delivery system architecture11 Jul 2024US 2024/0229716 A1GE Avio S. r. l.
- Lubricant flow control management for saw guides16 Jun 2022US 2022/0184720 A1Precision Guide Machinery and Repair Limited
- Device and method for dispensing a friction-coefficient-optimizing mixture19 Nov 2020US 2020/0361499 A1Nowe GmbH
Most cited
By later US patents
- Flow control arrangement in a circulation lubrication system29US 6,217,004 B1Safematic Oy · 2001
- Constant depth reservoir16US 5,197,569 ATrico Mfg. Corp. · 1993
- Control valve13US 4,303,197 ARobert Bosch GmbH · 1981
- Reservoir overfill protection3US 10,527,228 B2Graco Minnesota Inc. · 2020
- Lubrication circuit, particularly in an aircraft engine3US 10,961,880 B2Safran Aircraft Engines · 2021