F16K 15/14
Check valves: with flexible valve members
Official title: with flexible valve members
F16K15/14 (Check valves: with flexible valve members) appears on 2,203 US grants and 1,625 published applications in this corpus.
Search patents in F16K- Granted patents
- 2,203
- Published applications
- 1,625
- Assignees
- 1,316
- Inventors
- 3,918
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 36 | 0 |
| 1977 | 32 | 0 |
| 1978 | 27 | 0 |
| 1979 | 13 | 0 |
| 1980 | 40 | 0 |
| 1981 | 26 | 0 |
| 1982 | 26 | 0 |
| 1983 | 20 | 0 |
| 1984 | 23 | 0 |
| 1985 | 50 | 0 |
| 1986 | 34 | 0 |
| 1987 | 44 | 0 |
| 1988 | 34 | 0 |
| 1989 | 30 | 0 |
| 1990 | 43 | 0 |
| 1991 | 29 | 0 |
| 1992 | 44 | 0 |
| 1993 | 47 | 0 |
| 1994 | 46 | 0 |
| 1995 | 36 | 0 |
| 1996 | 26 | 0 |
| 1997 | 33 | 0 |
| 1998 | 39 | 0 |
| 1999 | 36 | 0 |
| 2000 | 56 | 0 |
| 2001 | 48 | 15 |
| 2002 | 38 | 44 |
| 2003 | 49 | 83 |
| 2004 | 56 | 70 |
| 2005 | 42 | 57 |
| 2006 | 32 | 66 |
| 2007 | 35 | 57 |
| 2008 | 27 | 43 |
| 2009 | 31 | 56 |
| 2010 | 32 | 41 |
| 2011 | 44 | 52 |
| 2012 | 43 | 54 |
| 2013 | 49 | 60 |
| 2014 | 57 | 50 |
| 2015 | 46 | 83 |
| 2016 | 47 | 72 |
| 2017 | 49 | 96 |
| 2018 | 78 | 91 |
| 2019 | 94 | 95 |
| 2020 | 72 | 80 |
| 2021 | 77 | 75 |
| 2022 | 72 | 72 |
| 2023 | 70 | 77 |
| 2024 | 59 | 52 |
| 2025 | 52 | 46 |
| 2026 | 34 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F16K 15/144The closure elements being fixed along all or a part of their1,178
- F16K 15/148The closure elements being fixed in their centre472
- F16K 15/16With tongue-shaped laminae423
- F16K 15/1402Having an integral flexible member cooperating with a plurality of seating surfaces260
- F16K 15/141The closure elements not being fixed to the valve body252
- F16K 15/1401Having a plurality of independent valve members81
Recent patents
- Variable flow vent assembly for a conduit mask29 Sep 2026US 12,746,362 B2ResMed Pty Ltd
- Vent with relief valve29 Sep 2026US 12,747,800 B2Donaldson Company, Inc.
- Mechanical cardiopulmonary resuscitation device suction cup22 Sep 2026US 12,740,918 B2Physio-Control, Inc.
- Head of a closed-circuit diving breathing apparatus (rebreather)22 Sep 2026US 12,741,726 B2Xdeep Sp. Z O. O. Sp. K.
- Dispensing valve15 Sep 2026US 12,735,232 B2AptarGroup, Inc.
- Valve apparatus with a domed valve disc24 Sep 2026US 2026/0287066 A1Wanner Engineering, Inc.
- Modified valve for use in a flow path10 Sep 2026US 2026/0263710 A1
- Valve and fluid control device10 Sep 2026US 2026/0266388 A1Murata Manufacturing Co., Ltd.
- Ultra-low flow limiting device3 Sep 2026US 2026/0258873 A1Canature Health Technology Group Co., Ltd.
- Urine collection device and anti-backflow assembly for a urine collection device27 Aug 2026US 2026/0248635 A1
Most cited
By later US patents
- Unitized three leaflet heart valve1,255US 4,222,126 AThe United States of America as represented by the Secretary of the Department of Health, Education and Welfare · 1980
- Dynamic annulus heart valve and reconstruction ring1,033US 4,339,831 AMedtronic, Inc. · 1982
- Method of making unitized three leaflet heart valve1,028US 4,265,694 AThe United States of America as represented by the Department of Health, Education and Welfare · 1981
- Valve for use with a catheter or the like575US 4,143,853 AMetatech Corporation · 1979
- Bronchial flow control devices and methods of use504US 7,011,094 B2Emphasys Medical, Inc. · 2006