F04B 53/1015
Combinations of ball valves working in parallel
Official title: {Combinations of ball valves working in parallel}
F04B53/1015 (Combinations of ball valves working in parallel) appears on 11 US grants and 7 published applications in this corpus.
Search patents in F04B- Granted patents
- 11
- Published applications
- 7
- Assignees
- 8
- Inventors
- 20
- Latest grant
- 21 Oct 2025
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 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 1 |
| 2020 | 2 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Check valve for RAT restow pump21 Oct 2025US 12,449,049 B2Hamilton Sundstrand Corporation
- Coupling unit for fluid element24 Dec 2024US 12,173,815 B2Woodster Capital, Ltd.
- Check valve9 Jun 2020US 10,677,389 B2
- Double-membrane pump and method for operation of such a double-membrane pump26 May 2020US 10,662,937 B2Lutz Holding GmbH
- Check valve29 Jan 2019US 10,190,726 B2
- Check valve for rat restow pump29 Aug 2024US 2024/0287951 A1Hamilton Sundstrand Corporation
- Coupling unit for fluid element5 Oct 2023US 2023/0313918 A1Woodster Capital, Ltd.
- Check valve22 Aug 2019US 2019/0257470 A1
- Double-membrane pump and method for operation of such a double-membrane pump10 May 2018US 2018/0128255 A1Lutz Holding GmbH
- Check Valve23 Nov 2017US 2017/0336023 A1
Most cited
By later US patents
- Standing valve assembly for an oil well pump7US 4,243,361 AOil Extractors, Inc. · 1981
- Check valve7US 9,611,980 B22017
- Pneumatic pump having radial ball check valve array3US 5,971,715 AClean Environment Engineers · 1999
- Fuel pump2US 6,098,519 AHitachi Car Engineering Co., Ltd. · 2000
- Fuel pump2US 6,361,286 B1Hitachi Car Engineering Co., Ltd. · 2002