F15B 11/00
Servomotor systems without provision for follow-up action
Official title: Servomotor systems without provision for follow-up action {; Circuits therefor}(F15B3/00 takes precedence)
F15B11/00 (Servomotor systems without provision for follow-up action) appears on 4,709 US grants and 3,843 published applications in this corpus.
Search patents in F15B- Granted patents
- 4,709
- Published applications
- 3,843
- Assignees
- 1,595
- Inventors
- 6,916
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 87 | 0 |
| 1977 | 50 | 0 |
| 1978 | 48 | 0 |
| 1979 | 43 | 0 |
| 1980 | 49 | 0 |
| 1981 | 42 | 0 |
| 1982 | 47 | 0 |
| 1983 | 37 | 0 |
| 1984 | 34 | 0 |
| 1985 | 44 | 0 |
| 1986 | 39 | 0 |
| 1987 | 45 | 0 |
| 1988 | 53 | 0 |
| 1989 | 30 | 0 |
| 1990 | 25 | 0 |
| 1991 | 53 | 0 |
| 1992 | 44 | 0 |
| 1993 | 47 | 0 |
| 1994 | 53 | 0 |
| 1995 | 41 | 0 |
| 1996 | 45 | 0 |
| 1997 | 37 | 0 |
| 1998 | 65 | 0 |
| 1999 | 79 | 0 |
| 2000 | 75 | 0 |
| 2001 | 123 | 15 |
| 2002 | 95 | 88 |
| 2003 | 97 | 123 |
| 2004 | 107 | 110 |
| 2005 | 84 | 102 |
| 2006 | 77 | 99 |
| 2007 | 82 | 109 |
| 2008 | 66 | 94 |
| 2009 | 74 | 98 |
| 2010 | 62 | 99 |
| 2011 | 64 | 78 |
| 2012 | 56 | 116 |
| 2013 | 97 | 149 |
| 2014 | 96 | 136 |
| 2015 | 110 | 213 |
| 2016 | 132 | 224 |
| 2017 | 190 | 247 |
| 2018 | 207 | 251 |
| 2019 | 280 | 282 |
| 2020 | 301 | 256 |
| 2021 | 277 | 221 |
| 2022 | 195 | 189 |
| 2023 | 170 | 155 |
| 2024 | 165 | 163 |
| 2025 | 181 | 142 |
| 2026 | 109 | 84 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F15B 11/16Servomotor systems without provision for follow-up action: with two or more servomotors2,004
- F15B 11/02Systems essentially incorporating special features for controlling the speed or the actuating1,981
- F15B 11/08Servomotor systems without provision for follow-up action: with only one servomotor831
- F15B 11/06Involving features specific to the use of a compressible medium301
- F15B 11/003Systems with load-holding valves226
- F15B 11/006Hydraulic "wheatstone bridge" circuits, i.e. with four nodes, p-a-t-b, and on-off or172
Recent patents
- Jack with hydraulic lock6 Oct 2026US 12,753,053 B2Pacific Rim International, LLC
- Construction machine6 Oct 2026US 12,753,569 B2Hitachi Construction Machinery Co., Ltd.
- Control method based on a four-chamber hydraulic cylinder6 Oct 2026US 12,753,780 B2Taiyuan University of Technology
- Electrohydraulic control device and adjustable hydraulic pump system6 Oct 2026US 12,753,781 B2HAWE Hydraulik SE
- Hybrid electro-hydraulic load sensing system and control method thereof15 Sep 2026US 12,736,067 B2Chongqing University
- Work Machine8 Oct 2026US 2026/0308879 A1Hitachi Construction Machinery Co., Ltd.
- Hydraulic system for a vehicle1 Oct 2026US 2026/0296861 A1Oshkosh Corporation
- Hydraulic System with Reservoir Surge Energy Recovery and Inlet Flow Supplement for Surface Engaging Machinery17 Sep 2026US 2026/0271819 A1Parker-Hannifin Corporation
- Hauling Vehicle27 Aug 2026US 2026/0249901 A1Hitachi Construction Machinery Co., Ltd.
- Hydraulic mechanical pumping unit with a ventilation duct for electronic components and a damping filtration system27 Aug 2026US 2026/0251138 A1
Most cited
By later US patents
- Pneumatically operated mechanism1,103US 6,050,172 AEmhart Glass S. A. · 2000
- Enhanced computer optimized adaptive suspension system and method196US 6,502,837 B1Kenmar Company Trust · 2003
- Enhanced computer optimized adaptive suspension system and method172US 7,076,351 B2Great Northern Technologies, LLC · 2006
- Linear servoactuator with integrated transformer position sensor158US 4,628,499 AScientific-Atlanta, Inc. · 1986
- Force-controlled hydro-elastic actuator139US 6,494,039 B2Massachusetts Institute of Technology · 2002