F04B 39/0094
Crankshaft
Official title: {crankshaft}
F04B39/0094 (Crankshaft) appears on 244 US grants and 316 published applications in this corpus.
Search patents in F04B- Granted patents
- 244
- Published applications
- 316
- Assignees
- 159
- Inventors
- 575
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 6 | 0 |
| 2001 | 8 | 1 |
| 2002 | 9 | 9 |
| 2003 | 8 | 8 |
| 2004 | 6 | 7 |
| 2005 | 3 | 8 |
| 2006 | 5 | 6 |
| 2007 | 4 | 8 |
| 2008 | 2 | 11 |
| 2009 | 2 | 5 |
| 2010 | 2 | 6 |
| 2011 | 3 | 9 |
| 2012 | 1 | 15 |
| 2013 | 4 | 6 |
| 2014 | 8 | 15 |
| 2015 | 6 | 30 |
| 2016 | 8 | 28 |
| 2017 | 11 | 18 |
| 2018 | 20 | 17 |
| 2019 | 15 | 17 |
| 2020 | 18 | 16 |
| 2021 | 25 | 17 |
| 2022 | 9 | 22 |
| 2023 | 7 | 12 |
| 2024 | 13 | 7 |
| 2025 | 9 | 8 |
| 2026 | 11 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Greenhouse gas reduction with externally pressurized gas seal and gas lubrication for a reciprocating compressor22 Sep 2026US 12,742,445 B2
- Refrigerant compressor15 Sep 2026US 12,736,041 B2Secop GmbH
- Dry-sump reciprocating piston compressor with lubricant circuit1 Sep 2026US 12,723,579 B2Officine Mario Dorin S.P.A.
- Head module for air compressor and air compressor including same2 Jun 2026US 12,644,446 B2MDX Co., Ltd.
- Reciprocating compressor19 May 2026US 12,631,169 B2LG Electronics Inc.
- Modular power end10 Sep 2026US 2026/0266280 A1Kerr Machine Co.
- Oil-free air compressor transmission structure, oil-free air compressor and vehicle6 Aug 2026US 2026/0226892 A1Zhejiang Ruili Air Compressor Equipment Co., Ltd.
- Near-isothermal gas compressor and/or /expander system30 Jul 2026US 2026/0218693 A1University of Virginia Patent Foundation
- Radial piston compressor23 Jul 2026US 2026/0210344 A1thyssenkrupp AG
- Modular Pump and Pump Modules for Modular Pumps16 Jul 2026US 2026/0201874 A1Oxus America, Inc.
Most cited
By later US patents
- Piston mounting and balancing system115US 6,832,900 B2Thomas Industries, Inc. · 2004
- Direct crankshaft of air compressor95US 8,388,317 B2Kohands. Co., Ltd · 2013
- Compression unit for a volumetric compressor without lubrification94US 10,830,225 B2Mgf S.R.L. · 2020
- Method and equipment for improving the efficiency of compressors and refrigerators94US 10,961,995 B22021
- Boosted air source heat pump55US 6,276,148 B12001