F15B 11/0325
The fluid-pressure converter increasing the working force after an approach stroke
Official title: {the fluid-pressure converter increasing the working force after an approach stroke}
F15B11/0325 (The fluid-pressure converter increasing the working force after an approach stroke) appears on 73 US grants and 42 published applications in this corpus.
Search patents in F15B- Granted patents
- 73
- Published applications
- 42
- Assignees
- 44
- Inventors
- 108
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 4 |
| 2003 | 4 | 5 |
| 2004 | 3 | 4 |
| 2005 | 4 | 1 |
| 2006 | 0 | 2 |
| 2007 | 2 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 2 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 2 |
| 2015 | 2 | 1 |
| 2016 | 1 | 0 |
| 2017 | 1 | 2 |
| 2018 | 1 | 1 |
| 2019 | 2 | 4 |
| 2020 | 3 | 0 |
| 2021 | 2 | 1 |
| 2022 | 0 | 1 |
| 2023 | 2 | 2 |
| 2024 | 0 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pneumohydraulic pressure intensifier12 May 2026US 12,624,710 B2WS Wieländer + Schill Engineering GmbH & Co. KG
- Hydraulic cylinder and system with pressure intensification16 Sep 2025US 12,416,316 B2Doben Limited
- Actuator overpressurising assembly21 Nov 2023US 11,821,443 B2Goodrich Actuation Systems Limited
- Hydraulic power pack system18 Jul 2023US 11,703,066 B2FOI Group, LLC
- Hydraulic pressure amplifier arrangement22 Jun 2021US 11,041,510 B2Pistonpower Aps
- Displacement Power Controllers and Applications5 Mar 2026US 2026/0063150 A1Perisseuma Technologies LLC
- Pneumohydraulic pressure intensifier22 Jan 2026US 2026/0022711 A1WS Wieländer + Schill Engineering GmbH & Co. KG
- Hydraulic cylinder and system with pressure intensification27 Nov 2025US 2025/0361882 A1Doben Limited
- Hydraulic cylinder and system with pressure intensification27 Mar 2025US 2025/0101997 A1Doben Limited
- Fluid pressure driving device22 Feb 2024US 2024/0060515 A1Mori Kogyo Co., Ltd.
Most cited
By later US patents
- Hydraulic system for supplying hydraulic fluid to a hydraulically operated device alternately at pressures of different value71US 4,142,368 AWelko Industriale S.p.A. · 1979
- Oleopneumatic intensifier cylinder50US 5,107,681 ASavair Inc. · 1992
- Boosted hydro-pneumatic drive21US 4,300,351 A1981
- Two step pressure intensifier system18US 4,271,671 A1981
- Pneumo-hydraulic booster with rapid-traverse feature15US 4,288,987 A1981