F16K 15/12
Springs for ring valves
F16K15/12 (Springs for ring valves) appears on 28 US grants and 19 published applications in this corpus.
Search patents in F16K- Granted patents
- 28
- Published applications
- 19
- Assignees
- 22
- Inventors
- 49
- Latest grant
- 13 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 2 |
| 2015 | 0 | 2 |
| 2016 | 3 | 1 |
| 2017 | 1 | 0 |
| 2018 | 3 | 2 |
| 2019 | 0 | 3 |
| 2020 | 3 | 3 |
| 2021 | 2 | 1 |
| 2022 | 2 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Flow control device13 May 2025US 12,296,307 B2Ozone 1 Pty Ltd
- Gas purge port20 Sep 2022US 11,448,330 B2Miraial Co., Ltd.
- Dual disc non-slam nozzle check valve1 Feb 2022US 11,236,837 B2Oceaneering International, Inc.
- Check valve assembly6 Jul 2021US 11,054,048 B2Ohlins Racing AB
- Annular valve and valve body for annular valve22 Jun 2021US 11,041,572 B2
- Flow control device7 Aug 2025US 2025/0249414 A1Ozone 1 Pty Ltd
- Flow control device10 Mar 2022US 2022/0072488 A1Ozone 1 Pty Ltd
- Compressor valve9 Sep 2021US 2021/0277879 A1
- Gas purge port10 Dec 2020US 2020/0386334 A1Miraial Co., Ltd.
- Annular valve and valve body for annular valve26 Nov 2020US 2020/0370668 A1Mitsui E&S Machinery Co., Ltd.
Most cited
By later US patents
- Linear flow turn down valve44US 5,009,393 AHarper-Wyman Company · 1991
- Compressor inlet valve35US 5,785,081 AWestinghouse Air Brake Company · 1998
- Differential pressure valve with parallel biasing springs and method for reducing spring surge27US 9,297,373 B2Nuovo Pignone S.p.A. · 2016
- Valve structure of hydraulic buffer23US 4,721,130 AToyota Jidosha Kabushiki Kaisha · 1988
- Differential pressure valve with reduced spring-surge and method for reducing spring surge23US 9,874,286 B22018