F16K 15/033
Spring-loaded
Official title: {spring-loaded}
F16K15/033 (Spring-loaded) appears on 329 US grants and 222 published applications in this corpus.
Search patents in F16K- Granted patents
- 329
- Published applications
- 222
- Assignees
- 180
- Inventors
- 487
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 4 | 0 |
| 1978 | 8 | 0 |
| 1979 | 0 | 0 |
| 1980 | 8 | 0 |
| 1981 | 6 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 11 | 0 |
| 1990 | 3 | 0 |
| 1991 | 6 | 0 |
| 1992 | 5 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 7 | 0 |
| 1999 | 5 | 0 |
| 2000 | 9 | 0 |
| 2001 | 14 | 2 |
| 2002 | 5 | 7 |
| 2003 | 10 | 7 |
| 2004 | 5 | 7 |
| 2005 | 5 | 9 |
| 2006 | 4 | 6 |
| 2007 | 5 | 5 |
| 2008 | 4 | 9 |
| 2009 | 3 | 3 |
| 2010 | 3 | 5 |
| 2011 | 3 | 8 |
| 2012 | 6 | 6 |
| 2013 | 11 | 11 |
| 2014 | 7 | 8 |
| 2015 | 6 | 4 |
| 2016 | 9 | 15 |
| 2017 | 12 | 16 |
| 2018 | 12 | 14 |
| 2019 | 12 | 10 |
| 2020 | 14 | 13 |
| 2021 | 13 | 12 |
| 2022 | 10 | 12 |
| 2023 | 14 | 15 |
| 2024 | 11 | 7 |
| 2025 | 10 | 9 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Check valve having pivoting link29 Sep 2026US 12,747,799 B2Zurn Water, LLC
- Check valve for backflow preventer8 Sep 2026US 12,729,774 B2Zurn Water, LLC
- Swinging door check valve21 Apr 2026US 12,607,270 B2Improved Racing Products, LLC
- Check cover assemblies for backflow prevention assemblies with integrated test cock protection shroud31 Mar 2026US 12,590,641 B2Watts Regulator Co.
- Valve device with ball locks30 Dec 2025US 12,510,197 B2Aerojet Rocketdyne, Inc.
- Flapper valve for aircraft engine18 Jun 2026US 2026/0168445 A1Pratt & Whitney Canada Corp.
- Calibrated Flow Rate Sensing and Flow Control Device18 Jun 2026US 2026/0168826 A1Victaulic Company
- Check valve25 Dec 2025US 2025/0389339 A1Forum US, Inc.
- Water chilling unit18 Dec 2025US 2025/0383134 A1Carrier Corporation
- Connector and movable object including the same11 Sep 2025US 2025/0282192 A1Hyundai Motor Company
Most cited
By later US patents
- Check valve including means to permit selective back flow122US 5,819,791 AGulf Valve Company · 1998
- Check valve assembly and method for mounting and installing check valves within a housing73US 5,584,315 AAmes Company, Inc. · 1996
- Backflow preventer and relief valve assembly72US 3,996,962 ARockwell International Corporation · 1976
- Swing check valve70US 6,679,290 B2Dixon Bayco Limited · 2004
- Check valve and backflow preventer64US 5,947,152 AGrinnell Corporation · 1999