F15B 13/021
Valves for interconnecting the fluid chambers of an actuator
Official title: {Valves for interconnecting the fluid chambers of an actuator}
F15B13/021 (Valves for interconnecting the fluid chambers of an actuator) appears on 139 US grants and 132 published applications in this corpus.
Search patents in F15B- Granted patents
- 139
- Published applications
- 132
- Assignees
- 99
- Inventors
- 314
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 3 |
| 2004 | 2 | 2 |
| 2005 | 3 | 4 |
| 2006 | 4 | 2 |
| 2007 | 0 | 2 |
| 2008 | 2 | 0 |
| 2009 | 1 | 3 |
| 2010 | 1 | 3 |
| 2011 | 2 | 1 |
| 2012 | 2 | 2 |
| 2013 | 0 | 1 |
| 2014 | 1 | 5 |
| 2015 | 2 | 14 |
| 2016 | 6 | 10 |
| 2017 | 11 | 9 |
| 2018 | 4 | 14 |
| 2019 | 12 | 15 |
| 2020 | 13 | 11 |
| 2021 | 15 | 12 |
| 2022 | 9 | 5 |
| 2023 | 6 | 3 |
| 2024 | 6 | 4 |
| 2025 | 5 | 4 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electro-hydraulic actuator with a pilot-actuated float mode16 Jun 2026US 12,655,918 B2Parker-Hannifin Corporation
- Hydraulic system and passenger restraint system10 Mar 2026US 12,570,235 B2HAWE Hydraulik SE
- Hydraulically actuated mechanical lock assembly5 Aug 2025US 12,378,931 B2Goodrich Actuation Systems Limited
- Active suspension for a vehicle20 May 2025US 12,304,268 B2Instituto Tecnologico Y De Estudios Superiores De Monterrey
- Hydraulic system for working machine15 Apr 2025US 12,276,086 B2Kubota Corporation
- Motion Driven Filtration System6 Aug 2026US 2026/0226923 A1
- Hydraulic valve and hydraulic circuit25 Jun 2026US 2026/0177081 A1Komatsu Ltd.
- Dual acting hydraulic system and related devices and methods25 Dec 2025US 2025/0388278 A1Behnke Enterprises, Inc.
- Hydraulic system and passenger restraint system24 Jul 2025US 2025/0236258 A1HAWE Hydraulik SE
- Active suspension for a vehicle13 Feb 2025US 2025/0050702 A1Instituto Tecnologico Y De Estudios Superiores De Monterrey
Most cited
By later US patents
- Electro-hydraulic power steering system98US 6,298,941 B12001
- Precision electro-hydraulic actuator positioning system57US 6,575,264 B2Dana Corporation · 2003
- Pressure sensing regenerative hydraulic system22US 4,216,702 AEaton Yale Ltd. · 1980
- Hydraulic active boom suspension for a telehandler21US 6,988,363 B2Deere & Company · 2006
- Control circuit for a cylinder allowing flow between an upper and a lower chamber19US 5,065,664 AKabushiki Kaisha Toyoda Jidoshokki Seisakusho · 1991