F01C 19/025
Radial sealing elements specially adapted for intermeshing engagement type machines or engines
Official title: {Radial sealing elements specially adapted for intermeshing engagement type machines or engines, e.g. gear machines or engines}
F01C19/025 (Radial sealing elements specially adapted for intermeshing engagement type machines or engines) appears on 26 US grants and 30 published applications in this corpus.
Search patents in F01C- Granted patents
- 26
- Published applications
- 30
- Assignees
- 14
- Inventors
- 46
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 1 | 2 |
| 2006 | 2 | 2 |
| 2007 | 0 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 1 |
| 2010 | 1 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 3 |
| 2016 | 1 | 0 |
| 2017 | 2 | 6 |
| 2018 | 1 | 2 |
| 2019 | 4 | 2 |
| 2020 | 2 | 3 |
| 2021 | 3 | 0 |
| 2022 | 2 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 2 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Rotary piston machine3 Feb 2026US 12,540,572 B2
- Combined sealing piece, volumetric machine and wide fuel engine18 Nov 2025US 12,473,872 B2
- Pumps, compressors, and expanders with a teardrop-shaped rotor8 Jul 2025US 12,352,268 B2Rotoliptic Technologies Incorporated
- Progressing cavity device with cutter disks23 Aug 2022US 11,421,693 B2Roper Pump Company
- Sealing sleeve for geared shaft of gearmotor assembly1 Feb 2022US 11,236,614 B2Nidec Motor Corporation
- Rotary Machines With Teardrop-Shaped Rotors2 Oct 2025US 2025/0305496 A1Rotoliptic Technologies Incorporated
- Combined Sealing Piece, Volumetric Machine and Wide Fuel Engine19 Jun 2025US 2025/0198363 A1
- Rotary piston machine10 Apr 2025US 2025/0116223 A1
- Rotary Machines With Teardrop-Shaped Rotors28 Dec 2023US 2023/0417242 A1Rotoliptic Technologies Incorporated
- Rotary piston engine and method for operating a rotary piston engine24 Dec 2020US 2020/0400022 A1Fuelsave GmbH
Most cited
By later US patents
- Rotary internal combustion engine34US 4,241,713 A1980
- Planetary piston rotary engine11US 6,932,047 B2Power Source Technologies, Inc. · 2005
- Planetary rotary internal combustion engine6US 7,350,501 B2Power Source Technologies, Inc. · 2008
- Sealing sleeve for geared shaft of gearmotor assembly4US 10,458,237 B2Nidec Motor Corporation · 2019
- Mechanical seal for gearmotor assembly having threaded bearing retainer3US 10,400,600 B2Nidec Motor Corporation · 2019