F15B 11/072
Combined pneumatic-hydraulic systems
F15B11/072 (Combined pneumatic-hydraulic systems) appears on 139 US grants and 111 published applications in this corpus.
Search patents in F15B- Granted patents
- 139
- Published applications
- 111
- Assignees
- 107
- Inventors
- 277
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 4 | 3 |
| 2003 | 2 | 4 |
| 2004 | 3 | 4 |
| 2005 | 2 | 4 |
| 2006 | 2 | 4 |
| 2007 | 3 | 0 |
| 2008 | 1 | 2 |
| 2009 | 2 | 2 |
| 2010 | 1 | 3 |
| 2011 | 0 | 1 |
| 2012 | 2 | 3 |
| 2013 | 2 | 7 |
| 2014 | 4 | 2 |
| 2015 | 2 | 6 |
| 2016 | 3 | 4 |
| 2017 | 4 | 4 |
| 2018 | 1 | 8 |
| 2019 | 2 | 8 |
| 2020 | 14 | 5 |
| 2021 | 3 | 11 |
| 2022 | 5 | 7 |
| 2023 | 9 | 6 |
| 2024 | 6 | 4 |
| 2025 | 5 | 5 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Apparatus for operating a machine work tool23 Jun 2026US 12,662,798 B2Caterpillar Global Mining LLC
- Pneumohydraulic pressure intensifier12 May 2026US 12,624,710 B2WS Wieländer + Schill Engineering GmbH & Co. KG
- Hydraulic isolation cylinder-based system24 Feb 2026US 12,560,182 B1SRI Energy, Inc.
- Counterbalanced retract actuator for landing gear18 Nov 2025US 12,473,080 B2Goodrich Corporation
- Hydraulic actuator with dual pneumatic operation applied as hydraulic actuation for hydroelectric power plants30 Sep 2025US 12,429,075 B2Metal Tecnica Bovenau Ltda
- Hydraulic Isolation Cylinder-Based System6 Aug 2026US 2026/0226921 A1SRI Energy, Inc.
- Turbo engine including a system to control pitch of a propeller blade4 Jun 2026US 2026/0153033 A1General Electric Company
- Energy Storage and Control System for Pipeline Flow Control12 Feb 2026US 2026/0043422 A1
- 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
Most cited
By later US patents
- System and method for rapid isothermal gas expansion and compression for energy storage86US 7,802,426 B2SustainX, Inc. · 2010
- Pneumo-hydraulic converter for energy storage76US 6,145,311 A2000
- Pneumatic-hydraulic actuator system74US 4,335,867 A1982
- Bi-fluid actuator60US 6,711,984 B22004
- Hydro or oleopneumatic devices58US 3,942,323 A1976