F15B 15/14
Of the straight-cylinder type
Official title: of the straight-cylinder type
F15B15/14 (Of the straight-cylinder type) appears on 2,011 US grants and 1,908 published applications in this corpus.
Search patents in F15B- Granted patents
- 2,011
- Published applications
- 1,908
- Assignees
- 1,146
- Inventors
- 3,819
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 19 | 0 |
| 1977 | 11 | 0 |
| 1978 | 13 | 0 |
| 1979 | 4 | 0 |
| 1980 | 15 | 0 |
| 1981 | 12 | 0 |
| 1982 | 16 | 0 |
| 1983 | 3 | 0 |
| 1984 | 15 | 0 |
| 1985 | 13 | 0 |
| 1986 | 12 | 0 |
| 1987 | 17 | 0 |
| 1988 | 22 | 0 |
| 1989 | 20 | 0 |
| 1990 | 17 | 0 |
| 1991 | 14 | 0 |
| 1992 | 18 | 0 |
| 1993 | 11 | 0 |
| 1994 | 24 | 0 |
| 1995 | 23 | 0 |
| 1996 | 15 | 0 |
| 1997 | 17 | 0 |
| 1998 | 26 | 0 |
| 1999 | 33 | 0 |
| 2000 | 37 | 0 |
| 2001 | 42 | 12 |
| 2002 | 44 | 46 |
| 2003 | 42 | 35 |
| 2004 | 36 | 29 |
| 2005 | 22 | 35 |
| 2006 | 30 | 50 |
| 2007 | 20 | 34 |
| 2008 | 32 | 45 |
| 2009 | 24 | 29 |
| 2010 | 24 | 46 |
| 2011 | 16 | 54 |
| 2012 | 25 | 47 |
| 2013 | 30 | 55 |
| 2014 | 42 | 59 |
| 2015 | 48 | 100 |
| 2016 | 63 | 111 |
| 2017 | 86 | 133 |
| 2018 | 125 | 132 |
| 2019 | 127 | 136 |
| 2020 | 131 | 134 |
| 2021 | 133 | 102 |
| 2022 | 97 | 90 |
| 2023 | 70 | 110 |
| 2024 | 110 | 112 |
| 2025 | 107 | 95 |
| 2026 | 58 | 77 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F15B 15/1423Component parts1,293
- F15B 15/149Fluid interconnections377
- F15B 15/16Of the telescopic type191
- F15B 15/1409With two or more independently movable working pistons144
- F15B 15/1404In clusters100
- F15B 15/1414With non-rotatable piston79
- F15B 2015/1495With screw mechanism attached to the pistonIndexing code61
- F15B 15/17Of differential-piston type26
Recent patents
- Liquid cooled plunger system6 Oct 2026US 12,753,754 B2Kerr Machine Co.
- Control method based on a four-chamber hydraulic cylinder6 Oct 2026US 12,753,780 B2Taiyuan University of Technology
- Fluid pressure cylinder6 Oct 2026US 12,753,782 B2SMC Corporation
- Auto-compensation-type guide device for moving coil of large-scale vibration table and operation method thereof29 Sep 2026US 12,747,783 B2China University of Mining and Technology
- Small displacement hydraulic actuator22 Sep 2026US 12,742,464 B2Zhejiang Kc Mechanical & Electrical Co., Ltd.
- Actuator unit, system and operating method8 Oct 2026US 2026/0309170 A1Knorr-Bremse Systeme fur Nutzfahrzeuge GmbH
- Method for operating a hydrodynamic compression tool and hydrodynamic compression tool24 Sep 2026US 2026/0284848 A1Cembre S.p.A.
- Two-speed epicyclic gearbox with clutch for aircraft propulsion system24 Sep 2026US 2026/0286903 A1Pratt & Whitney Canada Corp.
- Constant pressure generating system24 Sep 2026US 2026/0287034 A1White's Welding, LLC
- Slave cylinder with stop ring, method for mounting the slave cylinder and drive train with the slave cylinder24 Sep 2026US 2026/0287057 A1Schaeffler Technologies AG & Co. KG
Most cited
By later US patents