F15B 2201/50
Monitoring, detection and testing means for accumulators
F15B2201/50 (Monitoring, detection and testing means for accumulators) appears on 178 US grants and 187 published applications in this corpus.
Search patents in F15B- Granted patents
- 178
- Published applications
- 187
- Assignees
- 119
- Inventors
- 390
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 3 |
| 2003 | 1 | 3 |
| 2004 | 3 | 5 |
| 2005 | 1 | 2 |
| 2006 | 2 | 2 |
| 2007 | 1 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 2 |
| 2010 | 0 | 3 |
| 2011 | 1 | 2 |
| 2012 | 1 | 3 |
| 2013 | 4 | 10 |
| 2014 | 4 | 17 |
| 2015 | 6 | 13 |
| 2016 | 7 | 8 |
| 2017 | 14 | 19 |
| 2018 | 6 | 20 |
| 2019 | 20 | 10 |
| 2020 | 18 | 13 |
| 2021 | 17 | 15 |
| 2022 | 12 | 5 |
| 2023 | 8 | 10 |
| 2024 | 9 | 8 |
| 2025 | 9 | 6 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Work machine accessory motor load protection8 Sep 2026US 12,729,699 B2Caterpillar Inc.
- Pressure accumulator1 Sep 2026US 12,723,602 B2Hydac Technology GmbH
- Fluid circuit3 Mar 2026US 12,565,902 B2Eagle Industry Co., Ltd.
- Life determination device and life determination method30 Dec 2025US 12,510,394 B2Toyota Jidosha Kabushiki Kaisha
- Rolling assembly23 Dec 2025US 12,502,813 B2Carl Freudenberg KG
- Alarm system for detecting pressure tank failure24 Sep 2026US 2026/0290144 A1
- Load dampening system13 Aug 2026US 2026/0235142 A1J. C. Bamford Excavators Limited
- Intermediate hydraulic system and method of use30 Apr 2026US 2026/0117802 A1Country Mechanical Services
- Rolling assembly26 Feb 2026US 2026/0054432 A1Carl Freudenberg KG
- Energy Storage and Control System for Pipeline Flow Control12 Feb 2026US 2026/0043422 A1
Most cited
By later US patents
- Pressure vessel incorporating a sensor for detecting liquid in a gas chamber48US 4,788,851 AOlaer Industries · 1988
- Accumulator45US 4,799,048 AJidosha Kabushiki Kaisha · 1989
- Piston type accumulator for hydraulic system36US 5,024,250 ANakamura Koki Co., Ltd. · 1991
- Hydraulic hybrid accumulator shut-off valve32US 6,619,325 B2The United States of America as represented by the Administrator of the U. S. Environmental Protection Agency · 2003
- Hydropneumatic floating-piston accumulator26US 4,644,976 AGesellschaft fuer Hydraulik-Zubehoer mbH · 1987