F15B 2201/505
Testing of accumulators
Official title: Testing of accumulators, e.g. for testing tightness
F15B2201/505 (Testing of accumulators) appears on 21 US grants and 21 published applications in this corpus.
Search patents in F15B- Granted patents
- 21
- Published applications
- 21
- Assignees
- 17
- Inventors
- 51
- Latest grant
- 16 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 0 |
| 2017 | 2 | 4 |
| 2018 | 1 | 3 |
| 2019 | 2 | 1 |
| 2020 | 2 | 0 |
| 2021 | 4 | 3 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 2 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Prognostication and amelioration of gas ingress in hydraulic systems16 Sep 2025US 12,416,321 B2The Boeing Company
- Method and system for monitoring hydraulic accumulator pressure29 Apr 2025US 12,286,985 B2The Boeing Company
- Accumulator pre-charge monitoring using position sensor17 Oct 2023US 11,788,563 B2Deere & Company
- Hydraulic energy recovery apparatus for working machine19 Oct 2021US 11,149,753 B2Hitachi Construction Machinery Co., Ltd.
- Accumulator pre-charge determination14 Sep 2021US 11,118,605 B1Deere & Company
- Alarm system for detecting pressure tank failure24 Sep 2026US 2026/0290144 A1
- Method for checking the state of a hydraulic accumulator16 Oct 2025US 2025/0320882 A1Deere & Company
- Prognostication and amelioration of gas ingress in hydraulic systems1 Jun 2023US 2023/0167836 A1The Boeing Company
- Method and system for monitoring hydraulic accumulator pressure7 Jul 2022US 2022/0213907 A1The Boeing Company
- Hydraulic pumping system with piston displacement sensing and control4 Nov 2021US 2021/0340972 A1Amfields, LP
Most cited
By later US patents
- Pressure vessel incorporating a sensor for detecting liquid in a gas chamber48US 4,788,851 AOlaer Industries · 1988
- Failure sensing hydraulic accumulator and system22US 4,487,226 AVSI Corporation · 1984
- Failure sensing hydraulic accumulator and system16US 4,428,401 AVSI Corporation · 1984
- Apparatus for diagnosing accumulator based on fluid pressure in its fluid-tightly sealed state15US 6,494,545 B2NHK Spring Co., Ltd. · 2002
- Ultrasound testing device for gas pressure accumulators6US 5,520,053 AHydac Technology GmbH · 1996