F01M 1/04
Pressure lubrication: using pressure in working cylinder or crankcase to operate lubricant
Official title: using pressure in working cylinder or crankcase to operate lubricant feeding devices
F01M1/04 (Pressure lubrication: using pressure in working cylinder or crankcase to operate lubricant) appears on 129 US grants and 102 published applications in this corpus.
Search patents in F01M- Granted patents
- 129
- Published applications
- 102
- Assignees
- 62
- Inventors
- 219
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 5 | 0 |
| 2001 | 9 | 9 |
| 2002 | 5 | 5 |
| 2003 | 8 | 3 |
| 2004 | 6 | 7 |
| 2005 | 4 | 7 |
| 2006 | 6 | 1 |
| 2007 | 4 | 2 |
| 2008 | 2 | 1 |
| 2009 | 1 | 7 |
| 2010 | 0 | 1 |
| 2011 | 1 | 4 |
| 2012 | 3 | 5 |
| 2013 | 2 | 6 |
| 2014 | 7 | 5 |
| 2015 | 5 | 9 |
| 2016 | 1 | 6 |
| 2017 | 6 | 3 |
| 2018 | 3 | 6 |
| 2019 | 7 | 5 |
| 2020 | 5 | 3 |
| 2021 | 4 | 3 |
| 2022 | 3 | 0 |
| 2023 | 1 | 2 |
| 2024 | 1 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Engine27 Jan 2026US 12,535,031 B2Zhejiang CFMOTO Power Co., Ltd.
- Lubricating method of lubrication system of engine14 May 2024US 11,982,213 B2Yongkang Puyuan Tools Co., Ltd.
- Internal combustion engine and oil treatment apparatus for use with the same7 Nov 2023US 11,808,182 B2Kohler Co.
- Internal combustion engine and oil treatment apparatus for use with the same15 Nov 2022US 11,499,452 B2Kohler Co.
- Engine assembly4 Oct 2022US 11,459,918 B2Perkins Engines Company Limited
- Active control of gearbox case pressure30 Oct 2025US 2025/0334078 A1Hamilton Sundstrand Corporation
- Engine14 Nov 2024US 2024/0376842 A1Zhejiang CFMOTO Power Co., Ltd.
- Lubricating method of lubrication system of engine6 Jul 2023US 2023/0212966 A1Yongkang Puyuan Tools Co., Ltd.
- Internal combustion engine and oil treatment apparatus for use with the same2 Feb 2023US 2023/0036530 A1Kohler Co.
- Engine assembly23 Sep 2021US 2021/0293163 A1Perkins Engines Company Limited
Most cited
By later US patents
- Overhead cam engine with dry sump lubrication system57US 5,755,194 ATecumseh Products Company · 1998
- Lubricating system in a 4-cycle engine47US 5,947,075 AHonda Giken Kogyo Kabushiki Kaisha · 1999
- Lubricating system for four-stroke-cycle engine46US 5,709,185 AIshikawajima-Shibaura Machinery Co., Ltd. · 1998
- Operator carried power tool having a four-cycle engine42US 5,738,062 ARyobi Outdoor Products · 1998
- Lubricating system in a 4-cycle engine40US 6,213,081 B1Honda Giken Kogyo Kabushiki Kaisha · 2001