F04C 29/02
Lubrication
Official title: Lubrication (of machines or engines in general F01M); Lubricant separation (separation in general B01D)
F04C29/02 (Lubrication) appears on 1,812 US grants and 1,591 published applications in this corpus.
Search patents in F04C- Granted patents
- 1,812
- Published applications
- 1,591
- Assignees
- 467
- Inventors
- 3,091
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 7 | 0 |
| 1979 | 5 | 0 |
| 1980 | 5 | 0 |
| 1981 | 9 | 0 |
| 1982 | 8 | 0 |
| 1983 | 13 | 0 |
| 1984 | 22 | 0 |
| 1985 | 21 | 0 |
| 1986 | 16 | 0 |
| 1987 | 13 | 0 |
| 1988 | 20 | 0 |
| 1989 | 22 | 0 |
| 1990 | 13 | 0 |
| 1991 | 28 | 0 |
| 1992 | 19 | 0 |
| 1993 | 28 | 0 |
| 1994 | 25 | 0 |
| 1995 | 26 | 0 |
| 1996 | 31 | 0 |
| 1997 | 24 | 0 |
| 1998 | 22 | 0 |
| 1999 | 18 | 0 |
| 2000 | 42 | 0 |
| 2001 | 45 | 8 |
| 2002 | 33 | 39 |
| 2003 | 32 | 38 |
| 2004 | 29 | 57 |
| 2005 | 22 | 35 |
| 2006 | 33 | 52 |
| 2007 | 25 | 36 |
| 2008 | 29 | 50 |
| 2009 | 40 | 49 |
| 2010 | 32 | 56 |
| 2011 | 26 | 47 |
| 2012 | 45 | 51 |
| 2013 | 34 | 48 |
| 2014 | 39 | 60 |
| 2015 | 45 | 66 |
| 2016 | 59 | 70 |
| 2017 | 61 | 79 |
| 2018 | 60 | 94 |
| 2019 | 63 | 95 |
| 2020 | 100 | 110 |
| 2021 | 76 | 88 |
| 2022 | 108 | 82 |
| 2023 | 87 | 97 |
| 2024 | 128 | 63 |
| 2025 | 75 | 60 |
| 2026 | 41 | 61 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Adaptive lubricator box6 Oct 2026US 12,753,763 B2
- Air compressor29 Sep 2026US 12,747,730 B2Hitachi Industrial Equipment Systems Co., Ltd.
- Supercharger22 Sep 2026US 12,742,412 B2Eaton Intelligent Power Limited
- Compressor22 Sep 2026US 12,742,455 B2Samsung Electronics Co., Ltd.
- Scroll compressor15 Sep 2026US 12,736,050 B2Kabushiki Kaisha Toyota Jidoshokki
- Vacuum pump1 Oct 2026US 2026/0298238 A1Pfeiffer Vacuum GmbH
- Co-rotating scroll compressor24 Sep 2026US 2026/0286960 A1Hillyer Associates, LLC
- Oil storage device for compressor and compressor having the same24 Sep 2026US 2026/0286962 A1BITZER Refrigeration Technology (China) Co., Ltd.
- Pump body assembly, compressor and air conditioner17 Sep 2026US 2026/0275987 A1Gree Electric Appliances, Inc. of Zhuhai
- Scroll compressor and air conditioner comprising same10 Sep 2026US 2026/0266291 A1Samsung Electronics Co., Ltd.
Most cited
By later US patents
- Compressor unit and separator therefor245US 5,158,585 AHitachi, Ltd. · 1992
- Scroll-type machine with axially compliant mounting226US 4,877,382 ACopeland Corporation · 1989
- Oil level control system129US 6,125,642 ASporlan Valve Company · 2000
- Scroll-type machine with axially compliant mounting122US 4,767,293 ACopeland Corporation · 1988
- Non-orbiting scroll mounting arrangements for a scroll machine115US 5,102,316 ACopeland Corporation · 1992