F04B 39/0261
With an auxiliary oil pump
Official title: {with an auxiliary oil pump}
F04B39/0261 (With an auxiliary oil pump) appears on 69 US grants and 72 published applications in this corpus.
Search patents in F04B- Granted patents
- 69
- Published applications
- 72
- Assignees
- 40
- Inventors
- 190
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 4 | 4 |
| 2003 | 1 | 0 |
| 2004 | 2 | 9 |
| 2005 | 3 | 0 |
| 2006 | 3 | 2 |
| 2007 | 1 | 1 |
| 2008 | 1 | 0 |
| 2009 | 1 | 2 |
| 2010 | 0 | 4 |
| 2011 | 2 | 2 |
| 2012 | 2 | 3 |
| 2013 | 1 | 3 |
| 2014 | 4 | 5 |
| 2015 | 1 | 3 |
| 2016 | 3 | 1 |
| 2017 | 4 | 2 |
| 2018 | 1 | 5 |
| 2019 | 1 | 5 |
| 2020 | 4 | 1 |
| 2021 | 2 | 5 |
| 2022 | 4 | 6 |
| 2023 | 2 | 4 |
| 2024 | 3 | 1 |
| 2025 | 3 | 1 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Refrigerant compressor15 Sep 2026US 12,736,041 B2Secop GmbH
- Reciprocating compressor with dual oil pump28 Jul 2026US 12,692,852 B2Samsung Electronics Co., Ltd.
- Hermetic compressor23 Sep 2025US 12,421,949 B2LG Electronics Inc.
- Compressor18 Mar 2025US 12,253,085 B2Daikin Industries, Ltd.
- Noise reduction media for a reciprocating compressor18 Feb 2025US 12,228,119 B2Haier US Appliance Solutions, Inc.
- Dry-sump reciprocating piston compressor with lubricant circuit14 May 2026US 2026/0132776 A1Officine Mario Dorin S.P.A.
- Compressor and refrigeration apparatus30 Apr 2026US 2026/0117773 A1Daikin Industries, Ltd.
- Refrigerant compressor23 Apr 2026US 2026/0110293 A1Secop GmbH
- Reciprocating compressor with dual oil pump6 Mar 2025US 2025/0075692 A1Samsung Electronics Co., Ltd.
- Noise reduction media for a reciprocating compressor30 May 2024US 2024/0175434 A1Haier US Appliance Solutions, Inc.
Most cited
By later US patents
- Vented compressor lubrication system47US 5,176,506 ACopeland Corporation · 1993
- Horizontal two stage rotary compressor22US 6,929,455 B2Tecumseh Products Company · 2005
- Oil pump for a hermetic compressor20US 6,450,785 B1Zanussi Elettromeccanica S.p.A. · 2002
- Compressor having a lubricant pick-up tube guard14US 6,171,090 B2Tecumseh Products Company · 2001
- Scroll compressor oil pumping system12US 5,380,170 ACopeland Corporation · 1995