F15B 2201/31
Having rigid separating means
Official title: having rigid separating means, e.g. pistons
F15B2201/31 (Having rigid separating means) appears on 314 US grants and 304 published applications in this corpus.
Search patents in F15B- Granted patents
- 314
- Published applications
- 304
- Assignees
- 198
- Inventors
- 601
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 6 | 0 |
| 1987 | 8 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 8 | 1 |
| 2002 | 3 | 6 |
| 2003 | 8 | 6 |
| 2004 | 7 | 8 |
| 2005 | 5 | 10 |
| 2006 | 11 | 9 |
| 2007 | 1 | 5 |
| 2008 | 3 | 9 |
| 2009 | 5 | 9 |
| 2010 | 3 | 8 |
| 2011 | 9 | 12 |
| 2012 | 6 | 16 |
| 2013 | 11 | 21 |
| 2014 | 16 | 17 |
| 2015 | 11 | 15 |
| 2016 | 9 | 9 |
| 2017 | 15 | 15 |
| 2018 | 10 | 20 |
| 2019 | 22 | 16 |
| 2020 | 22 | 12 |
| 2021 | 11 | 12 |
| 2022 | 7 | 15 |
| 2023 | 14 | 14 |
| 2024 | 10 | 12 |
| 2025 | 12 | 19 |
| 2026 | 6 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Overpressure compensation systems and assemblies for a subsea manifold11 Aug 2026US 12,704,862 B2FMC Technologies, Inc.
- Drop-in signal accumulator piston kit and method for replacing an original equipment signal accumulator piston30 Jun 2026US 12,669,175 B2Sonnax Transmission Company
- Adaptive repressurizer26 May 2026US 12,638,026 B2Saudi Arabian Oil Company
- Drop-in signal accumulator piston kit and method for replacing an original equipment signal accumulator piston28 Apr 2026US 12,612,929 B2Sonnax Transmission Company
- Modification of aircraft for parabolic flight17 Feb 2026US 12,552,518 B2MU-G Technologies, LLC
- Load dampening system13 Aug 2026US 2026/0235142 A1J. C. Bamford Excavators Limited
- Integrated Electrohydraulic Actuator30 Jul 2026US 2026/0218734 A1Parker-Hannifin Corporation
- Electro-Hydraulic Actuator Assembly with a Fluid Access Port11 Jun 2026US 2026/0160279 A1Parker-Hannifin Corporation
- Device4 Jun 2026US 2026/0153102 A1Hydac Technology GmbH
- Medium pressure accumulator with fast fill supply valve and brake system using same21 May 2026US 2026/0138577 A1ZF Active Safety US Inc.
Most cited
By later US patents
- Method for arranging a separating piston in a cavity and a device with such a separating piston69US 7,975,814 B2Ohlins Racing AB · 2011
- Subsea accumulator and method of operation of same64US 6,202,753 B12001
- Adaptive hydropneumatic pulsation damper52US 5,797,430 AMercedes-Benz AG · 1998
- Accumulator51US 6,789,576 B2NHK Spring Co., Ltd. · 2004
- Pressure vessel incorporating a sensor for detecting liquid in a gas chamber48US 4,788,851 AOlaer Industries · 1988