F04B 27/0878
Pistons
Official title: {Pistons}
F04B27/0878 (Pistons) appears on 302 US grants and 217 published applications in this corpus.
Search patents in F04B- Granted patents
- 302
- Published applications
- 217
- Assignees
- 98
- Inventors
- 493
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 6 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 9 | 0 |
| 1999 | 23 | 0 |
| 2000 | 8 | 0 |
| 2001 | 22 | 14 |
| 2002 | 30 | 29 |
| 2003 | 24 | 26 |
| 2004 | 16 | 11 |
| 2005 | 8 | 10 |
| 2006 | 11 | 5 |
| 2007 | 8 | 7 |
| 2008 | 3 | 5 |
| 2009 | 1 | 6 |
| 2010 | 4 | 7 |
| 2011 | 3 | 4 |
| 2012 | 4 | 4 |
| 2013 | 2 | 9 |
| 2014 | 4 | 5 |
| 2015 | 7 | 16 |
| 2016 | 6 | 18 |
| 2017 | 14 | 17 |
| 2018 | 8 | 5 |
| 2019 | 5 | 5 |
| 2020 | 6 | 3 |
| 2021 | 4 | 2 |
| 2022 | 3 | 0 |
| 2023 | 4 | 5 |
| 2024 | 3 | 1 |
| 2025 | 2 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydraulic pump with swash plate tilt control3 Feb 2026US 12,540,605 B2Nabtesco Corporation
- Hydrostatic shoe with face seal9 Dec 2025US 12,492,637 B2Goodrich Corporation
- Compressor having bulged bushings25 Mar 2025US 12,258,965 B2Daikin Industries, Ltd.
- Pump body assembly and fluid machine3 Dec 2024US 12,158,139 B2Gree Electric Appliances, Inc. of Zhuhai
- Axial piston pump17 Sep 2024US 12,092,091 B2Contelec AG
- Piston assembly for hydraulic pump13 Nov 2025US 2025/0347276 A1Goodrich Actuation Systems Limited
- Hydrostatic shoe with face seal31 Jul 2025US 2025/0243758 A1Goodrich Corporation
- Ball support arrangement for axial piston machines26 Jun 2025US 2025/0207664 A1
- Compression mechanism1 Aug 2024US 2024/0254989 A1Daikin Industries, Ltd.
- Piston of a hydraulic piston machine7 Sep 2023US 2023/0279947 A1Danfoss A/S
Most cited
By later US patents
- Reciprocating pistons of piston-type compressor121US 6,038,960 ASanden Corporation · 2000
- Variable capacity swash plate type compressor49US 5,174,728 AKabushiki Kaisha Toyoda Jidoshokki Seisakusho · 1992
- Guiding mechanism for reciprocating piston of piston type compressor45US 5,382,139 AKabushiki Kaisha Toyoda Jodoshokki Seisakusho · 1995
- Swash plate type compressor37US 4,285,640 AKabushiki Kaisha Toyoda Jidoshokki Seisakusho · 1981
- Lubricating mechanism and method for a piston assembly of a slant plate type compressor37US 5,137,431 ASanden Corporation · 1992