F04B 27/0409
Pistons
Official title: {Pistons}
F04B27/0409 (Pistons) appears on 26 US grants and 38 published applications in this corpus.
Search patents in F04B- Granted patents
- 26
- Published applications
- 38
- Assignees
- 27
- Inventors
- 72
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 3 |
| 2012 | 0 | 3 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 3 |
| 2017 | 2 | 3 |
| 2018 | 0 | 2 |
| 2019 | 3 | 3 |
| 2020 | 3 | 4 |
| 2021 | 4 | 4 |
| 2022 | 1 | 2 |
| 2023 | 3 | 2 |
| 2024 | 2 | 1 |
| 2025 | 0 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Thermo-magnetic motor10 Mar 2026US 12,571,357 B1
- Connecting rod guide13 Jan 2026US 12,523,295 B2Advanced Flow Solutions Inc.
- Unified air compressor12 Nov 2024US 12,140,128 B2
- Reciprocating-piston machine, compressed air supply system, vehicle and method for producing a reciprocating-piston machine6 Aug 2024US 12,055,134 B2Zf Cv Systems Europe BV
- Systems and methods for a tangent drive high pressure pump18 Jul 2023US 11,703,048 B2Enfield Engine Company, LLC
- Piston pump with pistons, crank rods, and ball joints17 Sep 2026US 2026/0275975 A1Lear Corporation
- Connecting rod guide5 Jun 2025US 2025/0180116 A1Advanced Flow Solutions Inc.
- Radial piston rotary machine15 Aug 2024US 2024/0271624 A1Up-Steel, S.R.O.
- Unified air compressor14 Sep 2023US 2023/0287889 A1
- Reciprocating compressor for use with an economizer9 Feb 2023US 2023/0039145 A1Carrier Corporation
Most cited
By later US patents
- Method and equipment for improving the efficiency of compressors and refrigerators94US 10,961,995 B22021
- Cam driven compressor20US 4,105,371 AGeneral Motors Corporation · 1978
- System for piston rod monitoring5US 10,225,026 B2General Electric Company · 2019
- Fluid compressor4US 4,352,640 AHonda Giken Kogyo Kabushiki Kaisha · 1982
- Gas delivery system4US 6,792,846 B2Universal Oxygen, Inc. · 2004