F15B 15/1447
Pistons
Official title: {Pistons; Piston to piston rod assemblies}
F15B15/1447 (Pistons) appears on 450 US grants and 466 published applications in this corpus.
Search patents in F15B- Granted patents
- 450
- Published applications
- 466
- Assignees
- 342
- Inventors
- 973
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 7 | 0 |
| 2002 | 8 | 13 |
| 2003 | 10 | 6 |
| 2004 | 8 | 7 |
| 2005 | 7 | 5 |
| 2006 | 6 | 7 |
| 2007 | 3 | 5 |
| 2008 | 7 | 16 |
| 2009 | 3 | 5 |
| 2010 | 7 | 12 |
| 2011 | 2 | 13 |
| 2012 | 4 | 8 |
| 2013 | 8 | 8 |
| 2014 | 7 | 15 |
| 2015 | 7 | 22 |
| 2016 | 9 | 29 |
| 2017 | 20 | 39 |
| 2018 | 42 | 33 |
| 2019 | 33 | 32 |
| 2020 | 33 | 31 |
| 2021 | 34 | 22 |
| 2022 | 21 | 21 |
| 2023 | 16 | 27 |
| 2024 | 22 | 37 |
| 2025 | 39 | 23 |
| 2026 | 17 | 30 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Actuator assembly for a heavy construction machine25 Aug 2026US 12,716,429 B2Wipro Enterprises Pvt Ltd
- Single acting hydraulic cylinder with head end cushioning25 Aug 2026US 12,716,430 B2Wipro Enterprises Pvt Ltd
- Reciprocating piston pump18 Aug 2026US 12,710,033 B1Oshkosh Corporation
- Piston ring seal with reduced stiction18 Aug 2026US 12,710,063 B2
- Energy delivery system for supplying hydraulic pressure for severing an intervention medium11 Aug 2026US 12,704,042 B2Halliburton Energy Services.Inc.
- Method for operating a hydrodynamic compression tool and hydrodynamic compression tool24 Sep 2026US 2026/0284848 A1Cembre S.p.A.
- 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
- Electric cylinder device and brake fluid pressure control device17 Sep 2026US 2026/0274232 A1Advics Co., Ltd.
- Drive mechanism and tilt-trim device27 Aug 2026US 2026/0249968 A1Astemo, Ltd.
Most cited
By later US patents
- Fluid pressure cylinder apparatus86US 6,568,313 B2Sakagami Seisakusho Ltd. · 2003
- Hydraulic cylinder65US 4,003,297 ADu-Al Manufacturing Company · 1977
- Fluid servo and applications57US 8,863,641 B2Isentropic Limited · 2014
- Pneumatic pop-up units for material handling equipment52US 6,516,934 B22003
- Hydraulic tensioner50US 6,383,103 B1Tsubakimoto Chain Co. · 2002