F16N 13/20
Rotary pumps
Official title: Rotary pumps (with distributing equipment F16N13/22)
F16N13/20 (Rotary pumps) appears on 115 US grants and 91 published applications in this corpus.
Search patents in F16N- Granted patents
- 115
- Published applications
- 91
- Assignees
- 93
- Inventors
- 242
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 4 | 2 |
| 2003 | 1 | 2 |
| 2004 | 2 | 3 |
| 2005 | 1 | 3 |
| 2006 | 3 | 3 |
| 2007 | 0 | 2 |
| 2008 | 2 | 3 |
| 2009 | 1 | 1 |
| 2010 | 2 | 3 |
| 2011 | 3 | 1 |
| 2012 | 2 | 2 |
| 2013 | 1 | 4 |
| 2014 | 3 | 0 |
| 2015 | 0 | 4 |
| 2016 | 1 | 4 |
| 2017 | 5 | 3 |
| 2018 | 1 | 6 |
| 2019 | 8 | 15 |
| 2020 | 8 | 12 |
| 2021 | 10 | 6 |
| 2022 | 4 | 2 |
| 2023 | 6 | 2 |
| 2024 | 4 | 3 |
| 2025 | 4 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Mechanical lubricating oil system with kidney loop system28 Jul 2026US 12,692,977 B2Stewart & Stevenson LLC
- Grease inhibitor9 Dec 2025US 12,492,781 B2Graco Minnesota Inc.
- Portable class-II lubrication device11 Nov 2025US 12,467,585 B2Hove A/S
- Offset transfer case pump with lubrication distribution system5 Aug 2025US 12,377,804 B2Magna Powertrain of America, Inc.
- Systems and methods for bearing lubrication11 Feb 2025US 12,222,002 B1Saudi Arabian Oil Company
- Pump assembly25 Jun 2026US 2026/0177203 A1Pratt & Whitney Canada Corp.
- Drivetrain for wind turbine and wind turbine11 Jun 2026US 2026/0160235 A1Envision Energy CO.,LTD
- Portable class-ii lubrication device24 Apr 2025US 2025/0129884 A1Hove A/S
- Systems and methods for bearing lubrication13 Feb 2025US 2025/0052277 A1Saudi Arabian Oil Company
- Grease inhibitor13 Feb 2025US 2025/0052367 A1Electric Torque Machines, Inc.
Most cited
By later US patents
- Multiple vane rotary internal combustion engine35US 5,277,158 APangman Propulsion Company · 1994
- Lubrication scavenge system31US 4,631,009 ASundstrand Corporation · 1986
- Lubrication of journal bearing during clockwise and counter-clockwise rotation30US 8,702,373 B1United Technologies Corporation · 2014
- Marine stern drive oil cooling and circulating as well as pumping system28US 4,764,135 ABrunswick Corporation · 1988
- Gas turbine engine oil systems27US 4,576,001 AROLLS-ROYCE plc · 1986