F16N 19/006
Maintaining oil level
Official title: {Maintaining oil level (level control in general G05D9/00)}
F16N19/006 (Maintaining oil level) appears on 68 US grants and 35 published applications in this corpus.
Search patents in F16N- Granted patents
- 68
- Published applications
- 35
- Assignees
- 48
- Inventors
- 129
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 2 |
| 2005 | 1 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 3 |
| 2014 | 0 | 2 |
| 2015 | 0 | 0 |
| 2016 | 2 | 0 |
| 2017 | 5 | 4 |
| 2018 | 1 | 6 |
| 2019 | 0 | 0 |
| 2020 | 6 | 3 |
| 2021 | 0 | 1 |
| 2022 | 3 | 5 |
| 2023 | 4 | 4 |
| 2024 | 2 | 1 |
| 2025 | 3 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods16 Dec 2025US 12,497,879 B2BJ Energy Solutions, LLC
- Fluid management system for a drivetrain1 Jul 2025US 12,344,036 B2Deere & Company
- Device for measuring a liquid level of a medium at a high temperature, container, refrigerating machine or refrigeration cycle having such a device25 Mar 2025US 12,259,166 B2Armaturenwerk Altenburg GmbH
- Device and method for filling an oil reservoir of an aircraft engine23 Apr 2024US 11,964,779 B2Safran Aircraft Engines
- Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods2 Jan 2024US 11,859,482 B2BJ Energy Solutions, LLC
- Control method and control device for compressor unit30 Oct 2025US 2025/0334126 A1Carrier Corporation
- Fluid management system for a drivetrain30 Jan 2025US 2025/0033410 A1Deere & Company
- Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods21 Mar 2024US 2024/0093583 A1BJ Energy Solutions, LLC
- Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods29 Jun 2023US 2023/0203927 A1BJ Energy Solutions, LLC
- Power transmission device for helicopter4 May 2023US 2023/0137698 A1Kawasaki Jukogyo Kabushiki Kaisha
Most cited
By later US patents
- Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods133US 11,236,739 B2BJ Energy Solutions, LLC · 2022
- Oil level control system129US 6,125,642 ASporlan Valve Company · 2000
- Power sources and transmission networks for auxiliary equipment onboard hydraulic fracturing units and associated methods85US 11,530,602 B2BJ Energy Solutions, LLC · 2022
- Capacity controllable compressor apparatus56US 5,094,598 AHitachi, Ltd. · 1992
- Oil equalization system for parallel connected compressors46US 4,383,802 ADunham-Bush, Inc. · 1983