F15B 2211/47
Flow control in one direction only
F15B2211/47 (Flow control in one direction only) appears on 111 US grants and 63 published applications in this corpus.
Search patents in F15B- Granted patents
- 111
- Published applications
- 63
- Assignees
- 82
- Inventors
- 231
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 6 | 2 |
| 2002 | 5 | 3 |
| 2003 | 2 | 6 |
| 2004 | 5 | 7 |
| 2005 | 6 | 7 |
| 2006 | 6 | 4 |
| 2007 | 2 | 4 |
| 2008 | 3 | 3 |
| 2009 | 2 | 3 |
| 2010 | 1 | 1 |
| 2011 | 3 | 2 |
| 2012 | 2 | 0 |
| 2013 | 1 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 2 |
| 2016 | 0 | 2 |
| 2017 | 0 | 0 |
| 2018 | 1 | 2 |
| 2019 | 1 | 3 |
| 2020 | 2 | 0 |
| 2021 | 2 | 0 |
| 2022 | 2 | 5 |
| 2023 | 3 | 2 |
| 2024 | 6 | 2 |
| 2025 | 1 | 3 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Regulator having check valve manifold for use in subsea control circuit9 Jun 2026US 12,650,052 B2National Coupling Company, Inc.
- Oil drain valve, energy accumulation device, hydraulic system and working machine5 May 2026US 12,618,423 B2Sany Autmobile Manufacturing Co. Ltd
- Two-stage speed controller15 Apr 2025US 12,276,288 B1Taiwan Chelic Co., Ltd.
- Regulator having check valve manifold for use in subsea control circuit24 Dec 2024US 12,173,576 B2National Coupling Company, Inc.
- Flow control block for use with a vacuum material handler10 Sep 2024US 12,085,099 B1Vacuworx Global, LLC
- Hydraulic Circuit for Construction Machine1 May 2025US 2025/0137232 A1Caterpillar SARL
- Two-stage speed controller17 Apr 2025US 2025/0122893 A1Taiwan Chelic Co., Ltd.
- Regulator having check valve manifold for use in subsea control circuit20 Mar 2025US 2025/0092753 A1National Coupling Company, Inc.
- Oil drain valve, energy accumulation device, hydraulic system and working machine27 Jun 2024US 2024/0209874 A1Sany Automobile Manufacturing Co., Ltd.
- Regulator Having Check Valve Manifold for Use in Subsea Control Circuit18 Apr 2024US 2024/0125192 A1National Coupling Company, Inc.
Most cited
By later US patents
- Cartridge valve having solenoid bypass and integral relief valve94US 5,992,450 AEaton Corporation · 1999
- Shovel64US 6,789,335 B1Kobelco Construction Machinery Co., Ltd. · 2004
- Hydraulic valve module63US 4,170,214 ADouble A Products Company · 1979
- Multiple utilization of blow-mold air54US 5,648,026 AKrupp Corpoplast Maschinenbau GmbH · 1997
- Pressure oil energy recover/regenation apparatus54US 6,460,332 B1Komatsu Ltd. · 2002