F01B 3/0085
Pistons
Official title: {Pistons}
F01B3/0085 (Pistons) appears on 79 US grants and 52 published applications in this corpus.
Search patents in F01B- Granted patents
- 79
- Published applications
- 52
- Assignees
- 50
- Inventors
- 136
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 1 | 3 |
| 2006 | 0 | 1 |
| 2007 | 1 | 5 |
| 2008 | 2 | 1 |
| 2009 | 0 | 2 |
| 2010 | 4 | 1 |
| 2011 | 1 | 3 |
| 2012 | 2 | 1 |
| 2013 | 1 | 1 |
| 2014 | 1 | 1 |
| 2015 | 1 | 4 |
| 2016 | 2 | 11 |
| 2017 | 7 | 3 |
| 2018 | 3 | 3 |
| 2019 | 6 | 4 |
| 2020 | 5 | 1 |
| 2021 | 2 | 0 |
| 2022 | 2 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydraulic piston pump/motor with non-cantilevered pistons17 Feb 2026US 12,553,344 B2Goodrich Corporation
- Variable displacement hydraulic motor10 Jun 2025US 12,326,088 B2Dana Motion Systems Italia S.R.L.
- Opposed piston engine2 Aug 2022US 11,401,812 B2Hts LLC
- Rotatable piston assembly29 Mar 2022US 11,286,775 B2Poisedon Fluid Power, LLC
- Hydraulic device20 Jul 2021US 11,067,067 B2Innas B.V.
- Piston assembly for hydraulic pump13 Nov 2025US 2025/0347276 A1Goodrich Actuation Systems Limited
- Hydraulic piston pump/motor with non-cantilevered pistons18 Sep 2025US 2025/0290418 A1Goodrich Corporation
- Axial Piston Machine with Retraction Plate for High Rotational Speeds2 Jan 2025US 2025/0003338 A1Robert Bosch GmbH
- Hydraulic machine with a threaded central pin for setting machine preload12 Dec 2024US 2024/0410282 A1Dana Motion Systems Italia S.R.L.
- Variable displacement hydraulic motor22 Aug 2024US 2024/0280020 A1Dana Motion Systems Italia S.R.L.
Most cited
By later US patents
- Variable displacement and/or variable compression ratio piston engine45US 4,077,269 ALang Research Corporation · 1978
- Piston for hydrostatic axial and radial piston machines and method for the manufacture thereof35US 5,216,943 AHydromatik GmbH · 1993
- Axial piston rotary engine25US 5,813,372 AAdvanced Engine Technology Pty Ltd. · 1998
- Valving system for compressors, engines and the like19US 4,060,060 ATurner Research, Inc. · 1977
- Hollow piston for hydrostatic machines18US 4,191,095 ALinde Aktiengesellschaft · 1980