F15B 11/08
Servomotor systems without provision for follow-up action: with only one servomotor
Official title: with only one servomotor
F15B11/08 (Servomotor systems without provision for follow-up action: with only one servomotor) appears on 831 US grants and 787 published applications in this corpus.
Search patents in F15B- Granted patents
- 831
- Published applications
- 787
- Assignees
- 462
- Inventors
- 1,630
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 9 | 0 |
| 1978 | 6 | 0 |
| 1979 | 0 | 0 |
| 1980 | 6 | 0 |
| 1981 | 6 | 0 |
| 1982 | 6 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 6 | 0 |
| 1987 | 7 | 0 |
| 1988 | 9 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 9 | 0 |
| 1992 | 3 | 0 |
| 1993 | 7 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 6 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 7 | 0 |
| 2000 | 5 | 0 |
| 2001 | 10 | 2 |
| 2002 | 9 | 9 |
| 2003 | 9 | 10 |
| 2004 | 8 | 8 |
| 2005 | 3 | 5 |
| 2006 | 6 | 9 |
| 2007 | 4 | 6 |
| 2008 | 2 | 5 |
| 2009 | 4 | 5 |
| 2010 | 7 | 18 |
| 2011 | 8 | 8 |
| 2012 | 12 | 15 |
| 2013 | 15 | 19 |
| 2014 | 13 | 19 |
| 2015 | 14 | 47 |
| 2016 | 21 | 86 |
| 2017 | 36 | 106 |
| 2018 | 81 | 79 |
| 2019 | 106 | 98 |
| 2020 | 91 | 65 |
| 2021 | 83 | 49 |
| 2022 | 41 | 35 |
| 2023 | 35 | 26 |
| 2024 | 33 | 26 |
| 2025 | 26 | 19 |
| 2026 | 21 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Control method based on a four-chamber hydraulic cylinder6 Oct 2026US 12,753,780 B2Taiyuan University of Technology
- Manifold for a hydraulic vibration generating device or hydraulic motor8 Sep 2026US 12,728,442 B2
- Hydraulic power steering system25 Aug 2026US 12,715,501 B2Hydac New Technologies GmbH
- Construction machine25 Aug 2026US 12,716,203 B2Kobelco Construction Machinery Co., Ltd.
- Systems and methods for reducing wear in a reciprocating piston pump11 Aug 2026US 12,704,135 B2Spotton Corp.
- Work vehicle13 Aug 2026US 2026/0234908 A1Kubota Corporation
- Hydraulic Isolation Cylinder-Based System6 Aug 2026US 2026/0226921 A1SRI Energy, Inc.
- Fluid control assembly and system16 Jul 2026US 2026/0201971 A9Precision Planting LLC
- Hydraulic System having a Conditioning Circuit25 Jun 2026US 2026/0177085 A1Robert Bosch GmbH
- Hydraulic system11 Jun 2026US 2026/0163513 A1Kawasaki Jukogyo Kabushiki Kaisha
Most cited
By later US patents
- Hydraulic digital stepper actuator135US 4,434,704 AHalliburton Company · 1984
- Digital positioner for remote actuation of a control valve103US 4,072,087 ACaterpillar Tractor Co. · 1978
- Radial piston pump assemblies and use thereof in hydraulic circuits95US 10,125,750 B2HUSCO International, Inc. · 2018
- Specialized actuators driven by oscillatory transducers85US 6,069,420 AOmnific International, Ltd. · 2000
- Hydraulically operated fluid metering apparatus for use in a subterranean well, and associated methods60US 6,585,051 B2Welldynamics, Inc. · 2003