F15B 2211/7055
Having more than two chambers
Official title: having more than two chambers
F15B2211/7055 (Having more than two chambers) appears on 185 US grants and 153 published applications in this corpus.
Search patents in F15B- Granted patents
- 185
- Published applications
- 153
- Assignees
- 137
- Inventors
- 348
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 6 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 0 |
| 2002 | 3 | 4 |
| 2003 | 3 | 8 |
| 2004 | 10 | 9 |
| 2005 | 4 | 8 |
| 2006 | 4 | 7 |
| 2007 | 2 | 3 |
| 2008 | 5 | 2 |
| 2009 | 1 | 4 |
| 2010 | 3 | 2 |
| 2011 | 2 | 3 |
| 2012 | 0 | 1 |
| 2013 | 0 | 3 |
| 2014 | 3 | 7 |
| 2015 | 4 | 9 |
| 2016 | 6 | 7 |
| 2017 | 9 | 10 |
| 2018 | 5 | 10 |
| 2019 | 8 | 9 |
| 2020 | 10 | 8 |
| 2021 | 10 | 10 |
| 2022 | 9 | 9 |
| 2023 | 3 | 4 |
| 2024 | 8 | 4 |
| 2025 | 7 | 8 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Control method based on a four-chamber hydraulic cylinder6 Oct 2026US 12,753,780 B2Taiyuan University of Technology
- Actuator assembly for a heavy construction machine25 Aug 2026US 12,716,429 B2Wipro Enterprises Pvt Ltd
- Walking excavator2 Jun 2026US 12,644,249 B2Kaiser Aktiengesellschaft
- Pneumohydraulic pressure intensifier12 May 2026US 12,624,710 B2WS Wieländer + Schill Engineering GmbH & Co. KG
- Hydraulic actuator and method for operating5 May 2026US 12,618,420 B2Airbus Operations GmbH
- Two-way quick cylinder and wood splitter9 Jul 2026US 2026/0194080 A1
- Hydraulic or pneumatic actuator for trip valves of steam turbines or turbo-expanders7 May 2026US 2026/0126127 A1Nuovo Pignone Tecnologie Srl
- Open and closed circuit parallel drive system and control method based on a four-chamber hydraulic cylinder19 Feb 2026US 2026/0049622 A1Taiyuan University of Technology
- Pneumohydraulic pressure intensifier22 Jan 2026US 2026/0022711 A1WS Wieländer + Schill Engineering GmbH & Co. KG
- Actuator assembly for a heavy construction machine27 Nov 2025US 2025/0361889 A1Wipro Enterprises Pvt Ltd
Most cited
By later US patents
- Fail-safe actuation system926US 9,239,064 B2Moog Inc. · 2016
- Bi-fluid actuator60US 6,711,984 B22004
- Hydro or oleopneumatic devices58US 3,942,323 A1976
- Pneumatic actuator with hydraulic control53US 5,058,385 AThe United States of America as represented by the Secretary of the Navy · 1991
- Pneumatic cylinder with integral concentric hydraulic cylinder-type axially compact brake51US 4,907,495 A1990