F15B 9/12
In which both the controlling element and the servomotor control the same
Official title: in which both the controlling element and the servomotor control the same member influencing a fluid passage and are connected to that member by means of a differential gearing
F15B9/12 (In which both the controlling element and the servomotor control the same) appears on 65 US grants and 31 published applications in this corpus.
Search patents in F15B- Granted patents
- 65
- Published applications
- 31
- Assignees
- 54
- Inventors
- 111
- Latest grant
- 23 May 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 5 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 2 |
| 2005 | 2 | 1 |
| 2006 | 1 | 2 |
| 2007 | 0 | 1 |
| 2008 | 2 | 0 |
| 2009 | 0 | 2 |
| 2010 | 0 | 6 |
| 2011 | 1 | 4 |
| 2012 | 3 | 1 |
| 2013 | 3 | 1 |
| 2014 | 2 | 0 |
| 2015 | 2 | 2 |
| 2016 | 0 | 2 |
| 2017 | 2 | 0 |
| 2018 | 1 | 2 |
| 2019 | 3 | 2 |
| 2020 | 0 | 0 |
| 2021 | 2 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rotary servo for fixed fail actuators23 May 2023US 11,655,727 B1ROLLS-ROYCE plc
- Real-time capable control strategy for hydraulic systems while systematically taking into consideration control (rate) and state variable constraints29 Jun 2021US 11,048,281 B2Robert Bosch GmbH
- Hydraulic actuator and multi-cylinder hydraulic actuator system1 Jun 2021US 11,022,154 B2Goodrich Actuation Systems Limited
- System for actuating a control surface of an aircraft20 Aug 2019US 10,384,764 B2Airbus Operations GmbH
- Hydraulic rotary actuator with built-in mechanical position feedback11 Jun 2019US 10,316,867 B2Parker-Hannifin Corporation
- Servo valve11 Jun 2026US 2026/0160345 A1Microtecnica S.R.L.
- Actuator21 Dec 2023US 2023/0407890 A1Microtecnica S.R.L.
- Real-Time Capable Control Strategy for Hydraulic Systems While Systematically Taking into Consideration Control (Rate) and State Variable Constraints12 Dec 2019US 2019/0377371 A1Robert Bosch GmbH
- Hydraulic actuator and multi-cylinder hydraulic actuator system21 Feb 2019US 2019/0055965 A1Goodrich Actuation Systems Limited
- Hydraulic rotary actuator with built-in mechanical position feedback13 Sep 2018US 2018/0258963 A1Parker-Hannifin Corporation
Most cited
By later US patents
- Intermittent motion gear apparatus41US 4,352,299 AThe Bendix Corporation · 1982
- Hydraulic control system with tactile force and position feedback29US 6,508,058 B12003
- Hydraulic pressure booster having booster piston and valve mechanism associated with mechanically operated and electrically controlled pressure regulators22US 5,462,343 AToyota Jidosha Kabushiki Kaisha · 1995
- Electro-hydraulic proportional actuator21US 4,807,517 AAllied-Signal Inc. · 1989
- Electrohydraulic proportional actuator apparatus20US 4,044,652 AThe Garrett Corporation · 1977