F16N 23/00
Special adaptations of check valves
Official title: Special adaptations of check valves (check valves in general F16K)
F16N23/00 (Special adaptations of check valves) appears on 54 US grants and 45 published applications in this corpus.
Search patents in F16N- Granted patents
- 54
- Published applications
- 45
- Assignees
- 49
- Inventors
- 103
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 2 | 6 |
| 2017 | 3 | 2 |
| 2018 | 2 | 5 |
| 2019 | 2 | 5 |
| 2020 | 4 | 5 |
| 2021 | 4 | 3 |
| 2022 | 6 | 1 |
| 2023 | 3 | 4 |
| 2024 | 2 | 4 |
| 2025 | 3 | 4 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Grease filling apparatus for manual grease gun25 Aug 2026US 12,716,548 B2
- Arrangement and method for sealing a propeller shaft of a marine vessel18 Aug 2026US 12,709,372 B2ABB AB
- Lubrication system7 Apr 2026US 12,595,881 B2Kerr Machine Co.
- Lubricant distribution system with overfill protection29 Jul 2025US 12,372,202 B2Lincoln Industrial Corporation
- Blowdown valve with air-oil separation17 Jun 2025US 12,331,879 B2Pratt & Whitney Canada Corp.
- Lubrication system13 Aug 2026US 2026/0235254 A1Kerr Machine Co.
- Grease Filling Apparatus For Manual Grease Gun18 Jun 2026US 2026/0168618 A1
- Lubrication system17 Jul 2025US 2025/0230899 A1Kerr Machine Co.
- Grease discharging apparatus29 May 2025US 2025/0172240 A1Greenworks (Jiangsu) Co., Ltd.
- Lubricant distribution system with valve mount20 Mar 2025US 2025/0092989 A1
Most cited
By later US patents
- Plunger lubricant compensator for an earth boring drill bit51US 4,386,667 AHughes Tool Company · 1983
- Lubrication system with quick-change supply reservoir49US 3,972,387 AHoudaille Industries, Inc. · 1976
- Internal combustion engine lubricating oil filter valve35US 5,193,579 AFilterwerk Mann & Hummel GmbH · 1993
- Lubricant fitting22US 4,067,414 A1978
- Internal combustion engine lubricating oil filter valve21US 5,271,429 AFilterwerk Mann & Hummel GmbH · 1993