F15B
Systems acting by means of fluids in general
Official title: Systems acting by means of fluids in general; fluid-pressure actuators, e.g. servomotors; details of fluid-pressure systems, not otherwise provided for
F15B (Systems acting by means of fluids in general) appears on 17,387 US grants and 13,851 published applications in this corpus.
Search patents in F15B- Granted patents
- 17,387
- Published applications
- 13,851
- Assignees
- 5,079
- Inventors
- 24,991
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 303 | 0 |
| 1977 | 190 | 0 |
| 1978 | 204 | 0 |
| 1979 | 141 | 0 |
| 1980 | 211 | 0 |
| 1981 | 193 | 0 |
| 1982 | 189 | 0 |
| 1983 | 135 | 0 |
| 1984 | 183 | 0 |
| 1985 | 244 | 0 |
| 1986 | 192 | 0 |
| 1987 | 223 | 0 |
| 1988 | 213 | 0 |
| 1989 | 221 | 0 |
| 1990 | 153 | 0 |
| 1991 | 222 | 0 |
| 1992 | 190 | 0 |
| 1993 | 191 | 0 |
| 1994 | 216 | 0 |
| 1995 | 195 | 0 |
| 1996 | 206 | 0 |
| 1997 | 208 | 0 |
| 1998 | 249 | 0 |
| 1999 | 307 | 0 |
| 2000 | 294 | 0 |
| 2001 | 383 | 89 |
| 2002 | 368 | 306 |
| 2003 | 355 | 385 |
| 2004 | 330 | 398 |
| 2005 | 319 | 372 |
| 2006 | 294 | 368 |
| 2007 | 272 | 371 |
| 2008 | 233 | 374 |
| 2009 | 225 | 406 |
| 2010 | 239 | 428 |
| 2011 | 259 | 375 |
| 2012 | 272 | 464 |
| 2013 | 379 | 646 |
| 2014 | 400 | 642 |
| 2015 | 517 | 736 |
| 2016 | 565 | 709 |
| 2017 | 663 | 736 |
| 2018 | 673 | 861 |
| 2019 | 838 | 817 |
| 2020 | 894 | 880 |
| 2021 | 791 | 748 |
| 2022 | 699 | 620 |
| 2023 | 565 | 611 |
| 2024 | 595 | 614 |
| 2025 | 607 | 527 |
| 2026 | 379 | 368 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F15B 2211/00Circuits for servomotor systemsIndexing code6,226
- F15B 15/00Fluid-actuated devices for displacing a member from one position to another5,669
- F15B 13/00Details of servomotor systems5,011
- F15B 11/00Servomotor systems without provision for follow-up action4,709
- F15B 21/00Common features of fluid actuator systems3,059
- F15B 1/00Installations or systems with accumulators2,266
- F15B 20/00Safety arrangements for fluid actuator systems922
- F15B 2201/00AccumulatorsIndexing code876
All 16 main groupsShow fewer
- F15B 19/00Testing788
- F15B 7/00Systems in which the movement produced is definitely related to the output690
- F15B 9/00Servomotors with follow-up action430
- F15B 3/00Intensifiers or fluid-pressure converters286
- F15B 5/00Transducers converting variations of physical quantities182
- F15B 2215/00Fluid-actuated devices for displacing a member from one position to anotherIndexing code139
- F15B 18/00Parallel arrangements of independent servomotor systems104
- F15B 17/00Combinations of telemotor and servomotor systems12
Recent patents
- Systems, devices, and methods for a hydraulic robotic arm6 Oct 2026US 12,752,419 B2Sanctuary Cognitive Systems Corporation
- Vehicle suspension system with roll moment distribution control6 Oct 2026US 12,752,583 B2Advanced Suspension Technology LLC
- 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.
- System for returning fluid from hydraulic devices of work machines6 Oct 2026US 12,753,579 B2Caterpillar Inc.
- Slewing drive for a loading and/or unloading apparatus, loading and/or unloading apparatus with a slewing drive, tire-heating press and method for handling tires8 Oct 2026US 2026/0307349 A1Harburg-Freudenberger Maschinenbau GmbH
- Work Machine8 Oct 2026US 2026/0308879 A1Hitachi Construction Machinery Co., Ltd.
- Reinforcement assembly for gas turbine bearing housing8 Oct 2026US 2026/0309049 A1
- Method for Detecting Cavitation and/or a Bubbling-in or Inflow of Air within a Hydraulic System8 Oct 2026US 2026/0309158 A1KSB SE & Co. KGaA
- Weld cap and plug welds for fluid delivery systems8 Oct 2026US 2026/0309168 A1Compart Systems Pte. Ltd.
Most cited
By later US patents
- Pneumatic telescoping cylinder and method1,499US 5,341,724 A1994
- Self-induction-type stroke sensor1,339US 6,512,360 B1Amiteq Co., Ltd. · 2003
- Magnetic position sensor for measuring linear displacement1,173US 6,670,806 B2Koninklijke Philips Electronics N. V. · 2003
- Pneumatically operated mechanism1,103US 6,050,172 AEmhart Glass S. A. · 2000
- Piston-cylinder assembly1,065US 4,896,584 A1990