F16H 57/0447
Control of lubricant levels
Official title: {Control of lubricant levels, e.g. lubricant level control dependent on temperature}
F16H57/0447 (Control of lubricant levels) appears on 266 US grants and 251 published applications in this corpus.
Search patents in F16H- Granted patents
- 266
- Published applications
- 251
- Assignees
- 137
- Inventors
- 684
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 1 |
| 2003 | 2 | 1 |
| 2004 | 1 | 4 |
| 2005 | 3 | 4 |
| 2006 | 3 | 9 |
| 2007 | 5 | 4 |
| 2008 | 2 | 8 |
| 2009 | 3 | 10 |
| 2010 | 5 | 6 |
| 2011 | 4 | 10 |
| 2012 | 5 | 13 |
| 2013 | 11 | 13 |
| 2014 | 13 | 17 |
| 2015 | 15 | 7 |
| 2016 | 13 | 11 |
| 2017 | 9 | 13 |
| 2018 | 12 | 15 |
| 2019 | 13 | 16 |
| 2020 | 12 | 16 |
| 2021 | 13 | 17 |
| 2022 | 19 | 17 |
| 2023 | 16 | 10 |
| 2024 | 13 | 12 |
| 2025 | 14 | 14 |
| 2026 | 9 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Remote gearbox lubricant level gauge system for rotorcraft23 Jun 2026US 12,663,071 B2Textron Innovations Inc.
- Discharged liquid circulation system, an electric drive power assembly and an automobile2 Jun 2026US 12,646,998 B2Jing-Jin Electric Technologies Co., Ltd.
- Lubricant drip pan for a transmission housing of a vehicle transmission19 May 2026US 12,631,248 B2ZF Friedrichshafen AG
- Transmission arrangement with a shielding shell and motor vehicle with the transmission arrangement21 Apr 2026US 12,607,257 B2ZF Friedrichshafen AG
- Electric drive for a vehicle7 Apr 2026US 12,595,843 B2GKN Automotive AG
- Method for determining at least one volume flow rate in an apparatus for a hydraulic system, computer program product, and computer device2 Jul 2026US 2026/0185603 A1Audi AG
- Differential Gearing for a Vehicle and Drive Unit with an Electrical Machine and a Differential Gearing11 Jun 2026US 2026/0160327 A1ZF Friedrichshafen AG
- Power transmission device5 Feb 2026US 2026/0036197 A1JATCO Ltd
- Discharged liquid circulation system, an electric drive power assembly and an automobile20 Nov 2025US 2025/0357824 A1Jing-Jin Electric Technologies Co., Ltd.
- Gearbox assembly with lubricant extraction volume ratio25 Sep 2025US 2025/0297572 A1GE Avio S. r. l.
Most cited
By later US patents
- Drive apparatus for electric vehicle67US 5,821,653 AAisin Aw Co., Ltd. · 1998
- Axle driving apparatus with variable volume reservoir chamber58US 5,259,194 AKanzaki Kokyukoki Mfg.Co., Ltd. · 1993
- Churning loss reduction means for gear type devices55US 5,505,112 AEaton Corporation · 1996
- Device for controlling level of gear lubricant as a function of speed54US 6,299,561 B1Meritor Heavy Vehicle Systems, LLC · 2001
- Device for lubricating a geartrain47US 4,630,711 ASociete Anonyme D. B. A. · 1986