F04B 27/109
Lubrication
Official title: {Lubrication}
F04B27/109 (Lubrication) appears on 200 US grants and 144 published applications in this corpus.
Search patents in F04B- Granted patents
- 200
- Published applications
- 144
- Assignees
- 65
- Inventors
- 391
- Latest grant
- 23 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 14 | 0 |
| 1999 | 7 | 0 |
| 2000 | 10 | 0 |
| 2001 | 8 | 4 |
| 2002 | 11 | 11 |
| 2003 | 10 | 13 |
| 2004 | 6 | 14 |
| 2005 | 3 | 6 |
| 2006 | 7 | 8 |
| 2007 | 6 | 9 |
| 2008 | 2 | 14 |
| 2009 | 3 | 13 |
| 2010 | 4 | 9 |
| 2011 | 5 | 3 |
| 2012 | 9 | 3 |
| 2013 | 4 | 4 |
| 2014 | 2 | 5 |
| 2015 | 7 | 10 |
| 2016 | 3 | 1 |
| 2017 | 3 | 1 |
| 2018 | 3 | 3 |
| 2019 | 2 | 4 |
| 2020 | 1 | 1 |
| 2021 | 3 | 5 |
| 2022 | 1 | 1 |
| 2023 | 2 | 1 |
| 2024 | 2 | 1 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Variable displacement swash plate type compressor23 Sep 2025US 12,421,948 B2Hanon Systems
- Variable-displacement swash plate type compressor1 Jul 2025US 12,345,246 B2Valeo Japan Co., Ltd.
- Compressor28 May 2024US 11,994,119 B2Hanon Systems
- 3D-printed oil separation for reciprocating compressors2 Jan 2024US 11,859,603 B2Copeland Industrial LP
- Scroll compressor of lower compression type enabling active oil supply1 Aug 2023US 11,713,752 B2LG Electronics Inc.
- Variable-displacement swash plate type compressor11 Jan 2024US 2024/0011480 A1Valeo Japan Co., Ltd.
- Variable displacement swash plate type compressor7 Dec 2023US 2023/0392588 A1Hanon Systems
- Compressor27 Jan 2022US 2022/0025875 A1Hanon Systems
- 3D-Printed Oil Separation for Reciprocating Compressors30 Dec 2021US 2021/0404456 A1Vilter Manufacturing Corporation
- Pump with symmetrical mounting holes for asymmetrical mounting arrangement27 May 2021US 2021/0156377 A1FNA Group, Inc.
Most cited
By later US patents
- Refrigerant compressor lubrication system58US 4,480,964 AGeneral Motors Corporation · 1984
- Lubricating mechanism and method for a piston assembly of a slant plate type compressor37US 5,137,431 ASanden Corporation · 1992
- Direct suction radial compressor33US 4,470,772 ATecumseh Products Company · 1984
- Oil separator for a fluid displacement apparatus30US 7,520,210 B2Visteon Global Technologies, Inc. · 2009
- Lubrication system for compressor unit29US 4,005,948 ASankyo Electric Company Limited · 1977