F15B 2211/513
The positions being continuously variable
Official title: the positions being continuously variable, e.g. as realised by proportional valves
F15B2211/513 (The positions being continuously variable) appears on 81 US grants and 89 published applications in this corpus.
Search patents in F15B- Granted patents
- 81
- Published applications
- 89
- Assignees
- 79
- Inventors
- 248
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 2 |
| 2002 | 5 | 2 |
| 2003 | 4 | 5 |
| 2004 | 1 | 1 |
| 2005 | 4 | 4 |
| 2006 | 0 | 3 |
| 2007 | 1 | 3 |
| 2008 | 0 | 4 |
| 2009 | 1 | 2 |
| 2010 | 1 | 2 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 1 |
| 2014 | 2 | 4 |
| 2015 | 2 | 4 |
| 2016 | 0 | 1 |
| 2017 | 3 | 2 |
| 2018 | 2 | 3 |
| 2019 | 2 | 5 |
| 2020 | 4 | 6 |
| 2021 | 4 | 6 |
| 2022 | 6 | 5 |
| 2023 | 6 | 7 |
| 2024 | 8 | 9 |
| 2025 | 6 | 6 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hydraulic power steering system25 Aug 2026US 12,715,501 B2Hydac New Technologies GmbH
- Variable relief circuit19 May 2026US 12,631,201 B2HUSCO International, Inc.
- Valve21 Apr 2026US 12,607,207 B2Hydac Fluidtechnik GmbH
- Electromagnetic pilot-operated proportional pressure control valve17 Mar 2026US 12,577,965 B2Hydac Fluidtechnik GmbH
- Fluid circuit7 Oct 2025US 12,435,738 B2Eagle Industry Co., Ltd.
- Method and system for hydraulic flow control of automation systems for work implements of work machines26 Mar 2026US 2026/0085494 A1Deere & Company
- Valve Assembly for Double-Acting Hoisting Mechanism29 Jan 2026US 2026/0029001 A1Robert Bosch GmbH
- Hydraulic drive device11 Dec 2025US 2025/0376993 A1
- Hydraulic System20 Nov 2025US 2025/0354570 A1Hydac Mobilhydraulik GmbH
- Valve26 Jun 2025US 2025/0207683 A1Hydac Fluidtechnik GmbH
Most cited
By later US patents
- Hydraulic system, manifold and volumetric compensator73US 6,519,939 B1M-Mac Actuators, Inc. · 2003
- Drive device48US 6,543,223 B2Festo AG & Co. · 2003
- Proportional pressure control valve41US 5,836,335 AFluid Power Industries, Inc. · 1998
- Hydraulic fluid supply system22US 6,170,261 B2Komatsu Ltd. · 2001
- Hydraulic device20US 6,082,106 ANachi-Fujikoshi Corp. · 2000