F04C 29/025
Using a lubricant pump
Official title: {using a lubricant pump}
F04C29/025 (Using a lubricant pump) appears on 238 US grants and 199 published applications in this corpus.
Search patents in F04C- Granted patents
- 238
- Published applications
- 199
- Assignees
- 101
- Inventors
- 538
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 6 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 8 | 0 |
| 1994 | 7 | 0 |
| 1995 | 5 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 9 | 0 |
| 2001 | 9 | 0 |
| 2002 | 5 | 5 |
| 2003 | 1 | 2 |
| 2004 | 1 | 5 |
| 2005 | 3 | 4 |
| 2006 | 4 | 5 |
| 2007 | 1 | 12 |
| 2008 | 7 | 3 |
| 2009 | 5 | 9 |
| 2010 | 5 | 9 |
| 2011 | 3 | 9 |
| 2012 | 6 | 7 |
| 2013 | 4 | 7 |
| 2014 | 6 | 7 |
| 2015 | 7 | 8 |
| 2016 | 10 | 15 |
| 2017 | 8 | 5 |
| 2018 | 8 | 12 |
| 2019 | 8 | 15 |
| 2020 | 11 | 12 |
| 2021 | 10 | 6 |
| 2022 | 10 | 13 |
| 2023 | 10 | 10 |
| 2024 | 19 | 5 |
| 2025 | 5 | 9 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rotary compressor for rapid freezing appliances9 Jun 2026US 12,650,128 B2Rechi Precision Co., Ltd.
- Vacuum pump with oil drip shutoff2 Jun 2026US 12,644,453 B2
- Compressor and additional oil injection system having same5 May 2026US 12,618,408 B2Atlas Copco (Wuxi) Compressor Co., Ltd.
- Compressor assembly comprising a motor driving one or more compressor rotors and method for fabricating a housing part of such a compressor assembly31 Mar 2026US 12,590,586 B2Atlas Copco Airpower, Naamloze Vennootschap
- Multifunctional vacuum pump3 Feb 2026US 12,540,619 B2Jinhua Weike Industrial & Trading Co., Ltd
- Compressor with multiple lubricant sumps2 Jul 2026US 2026/0185526 A1Thermo King Corporation
- Centrifugal oil pump device for a vacuum pump11 Jun 2026US 2026/0160252 A1Edwards Limited
- Rotary compressor for rapid freezing appliances4 Jun 2026US 2026/0153088 A1Rechi Precision Co., Ltd.
- Scroll compressor28 May 2026US 2026/0146604 A1Kabushiki Kaisha Toyota Jidoshokki
- Vacuum Pump With Oil Drip Shutoff26 Mar 2026US 2026/0085686 A1
Most cited
By later US patents
- Scroll compressor with lubrication passages to the main bearing, revolving bearing, back-pressure chamber and compression chambers63US 5,263,822 AMatsushita Electric Industrial Co., Ltd. · 1993
- Scroll compressor for refrigerant57US 7,112,046 B2BITZER Kuehlmaschinenbau GmbH · 2006
- Rotary compressor with fluid diode check value for lubricating pump53US 4,385,875 ATokyo Shibaura Denki Kabushiki Kaisha · 1983
- Compressor49US 6,960,070 B2BITZER Kuehlmaschinenbau GmbH · 2005
- Vented compressor lubrication system47US 5,176,506 ACopeland Corporation · 1993