F04B 39/0005
Adaptations of pistons
Official title: {adaptations of pistons}
F04B39/0005 (Adaptations of pistons) appears on 794 US grants and 835 published applications in this corpus.
Search patents in F04B- Granted patents
- 794
- Published applications
- 835
- Assignees
- 427
- Inventors
- 1,533
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 14 | 0 |
| 1978 | 10 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 7 | 0 |
| 1990 | 7 | 0 |
| 1991 | 8 | 0 |
| 1992 | 10 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 11 | 0 |
| 1996 | 11 | 0 |
| 1997 | 13 | 0 |
| 1998 | 16 | 0 |
| 1999 | 11 | 0 |
| 2000 | 16 | 0 |
| 2001 | 15 | 3 |
| 2002 | 10 | 13 |
| 2003 | 18 | 25 |
| 2004 | 11 | 16 |
| 2005 | 13 | 21 |
| 2006 | 7 | 14 |
| 2007 | 11 | 24 |
| 2008 | 12 | 26 |
| 2009 | 6 | 9 |
| 2010 | 6 | 32 |
| 2011 | 13 | 15 |
| 2012 | 12 | 22 |
| 2013 | 13 | 26 |
| 2014 | 15 | 33 |
| 2015 | 13 | 51 |
| 2016 | 31 | 48 |
| 2017 | 26 | 64 |
| 2018 | 45 | 60 |
| 2019 | 58 | 41 |
| 2020 | 52 | 44 |
| 2021 | 42 | 60 |
| 2022 | 38 | 54 |
| 2023 | 32 | 34 |
| 2024 | 39 | 36 |
| 2025 | 34 | 41 |
| 2026 | 39 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Liquid cooled plunger system6 Oct 2026US 12,753,754 B2Kerr Machine Co.
- Pressure relief system for a portable air pump and inflator system22 Sep 2026US 12,742,444 B2The Noco Company
- Greenhouse gas reduction with externally pressurized gas seal and gas lubrication for a reciprocating compressor22 Sep 2026US 12,742,445 B2
- Piston compressor valve arrangement and method of use22 Sep 2026US 12,742,448 B2Heaten AS
- Air compressor structure8 Sep 2026US 12,729,671 B2Unik World Industrial Co., Ltd.
- Portable Air Pump and Inflator System with a Vibration Damping Base24 Sep 2026US 2026/0286946 A1The Noco Company
- Hydrogen store having a liquid piston10 Sep 2026US 2026/0266279 A1Maximator GmbH
- Double-piston assembly, two-stage compressor, and vehicle3 Sep 2026US 2026/0258796 A1Zhejiang Yaoming Technology Co., Ltd.
- Fracturing pump arrangement using a plunger with an internal fluid passage3 Sep 2026US 2026/0258797 A1Kerr Machine Co.
- Fuel compressor20 Aug 2026US 2026/0243241 A1Phinia Delphi Luxembourg Sarl
Most cited
By later US patents
- Reciprocating pump assembly188US 8,707,853 B1S,P.M. Flow Control, Inc. · 2014
- Gas compressor95US 5,771,693 ANational Power PLC · 1998
- Method and equipment for improving the efficiency of compressors and refrigerators94US 10,961,995 B22021
- Tubing pump system for pumping well fluids94US 5,765,639 AMuth Pump LLC · 1998
- Isothermal compressor apparatus and method92US 4,242,878 ASplit Cycle Energy Systems, Inc. · 1981