F04B 39/0022
Piston rods
Official title: {piston rods}
F04B39/0022 (Piston rods) appears on 188 US grants and 227 published applications in this corpus.
Search patents in F04B- Granted patents
- 188
- Published applications
- 227
- Assignees
- 135
- Inventors
- 439
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 3 |
| 2002 | 2 | 5 |
| 2003 | 5 | 8 |
| 2004 | 4 | 4 |
| 2005 | 5 | 8 |
| 2006 | 4 | 3 |
| 2007 | 6 | 3 |
| 2008 | 3 | 10 |
| 2009 | 1 | 2 |
| 2010 | 1 | 10 |
| 2011 | 4 | 5 |
| 2012 | 3 | 5 |
| 2013 | 2 | 4 |
| 2014 | 3 | 10 |
| 2015 | 3 | 15 |
| 2016 | 8 | 15 |
| 2017 | 5 | 12 |
| 2018 | 13 | 12 |
| 2019 | 14 | 9 |
| 2020 | 14 | 9 |
| 2021 | 10 | 12 |
| 2022 | 5 | 20 |
| 2023 | 7 | 11 |
| 2024 | 12 | 13 |
| 2025 | 15 | 11 |
| 2026 | 12 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- Air pulse generator11 Aug 2026US 12,702,616 B2Hill-Rom Services Pte. Ltd.
- Portable air pump and inflator system with a vibration damping base28 Jul 2026US 12,692,850 B2The Noco Company
- Wiper ring for reciprocating compressor rod packing7 Jul 2026US 12,674,444 B2Compressor Products International LLC (Cpi)
- Portable Air Pump and Inflator System with a Vibration Damping Base24 Sep 2026US 2026/0286946 A1The Noco Company
- Double-piston assembly, two-stage compressor, and vehicle3 Sep 2026US 2026/0258796 A1Zhejiang Yaoming Technology Co., Ltd.
- Hydrogen gas transport device and purging method for compressor30 Jul 2026US 2026/0218857 A1Kawasaki Jukogyo Kabushiki Kaisha
- Air compressor cylinder16 Jul 2026US 2026/0201879 A1Mastery Investment LLC
- Compressor and sensor cleaning system including the same9 Jul 2026US 2026/0192781 A1Hyundai Motor Company
Most cited
By later US patents
- Reciprocating pump assembly188US 8,707,853 B1S,P.M. Flow Control, Inc. · 2014
- Method and equipment for improving the efficiency of compressors and refrigerators94US 10,961,995 B22021
- Valved Piston arrangement for an electric motor driven air compressor46US 5,655,887 A1997
- Reciprocating pump assembly32US 9,695,812 B2S,P.M. Flow Control, Inc. · 2017
- Two-piece connecting rod for a reciprocating hermetic compressor28US 5,671,655 AEmpresa Brasileira de Compressores S.A. - Embraco · 1997