F01C 21/106
With a radial surface
Official title: {with a radial surface, e.g. cam rings}
F01C21/106 (With a radial surface) appears on 219 US grants and 182 published applications in this corpus.
Search patents in F01C- Granted patents
- 219
- Published applications
- 182
- Assignees
- 146
- Inventors
- 453
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 7 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 6 | 3 |
| 2002 | 3 | 0 |
| 2003 | 1 | 3 |
| 2004 | 2 | 0 |
| 2005 | 4 | 10 |
| 2006 | 5 | 7 |
| 2007 | 6 | 6 |
| 2008 | 3 | 7 |
| 2009 | 1 | 2 |
| 2010 | 1 | 4 |
| 2011 | 5 | 3 |
| 2012 | 3 | 7 |
| 2013 | 4 | 14 |
| 2014 | 10 | 11 |
| 2015 | 6 | 19 |
| 2016 | 10 | 12 |
| 2017 | 17 | 11 |
| 2018 | 13 | 11 |
| 2019 | 5 | 7 |
| 2020 | 12 | 7 |
| 2021 | 8 | 19 |
| 2022 | 12 | 6 |
| 2023 | 9 | 4 |
| 2024 | 3 | 6 |
| 2025 | 5 | 2 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing a housing, and shell housing and housing for a rotary piston engine26 May 2026US 12,637,946 B2Knapp e-mobility GmbH
- Connecting ring of a root vacuum pump5 May 2026US 12,618,407 B1Ching Link Consultant Company, Ltd
- Hermetic compressor with cylinder having elliptical inner circumferential surface, roller, and at least one vane7 Apr 2026US RE50,855 E1LG Electronics Inc.
- Pump for conveying a fluid4 Nov 2025US 12,460,634 B2Vogelsang GmbH & Co. KG
- Rotary compressor27 May 2025US 12,313,073 B2LG Electronics Inc.
- Volumetric heat engine with piston-pendulum30 Jul 2026US 2026/0218647 A1
- Fluid pump for an aircraft turbomachine, lubrication circuit and aircraft turbomachine19 Jun 2025US 2025/0198309 A1Safran Aero Boosters SA
- Uniaxial eccentric screw pump15 May 2025US 2025/0154950 A1HEISHIN Ltd.
- Air motor with increased dwell at max vane extension7 Nov 2024US 2024/0368992 A1
- Rotary compressor17 Oct 2024US 2024/0344518 A1LG Electronics Inc.
Most cited
By later US patents
- Portable ventilator system278US 7,188,621 B2Pulmonetic Systems, Inc. · 2007
- Molten metal pump with monolithic rotor115US 6,093,000 A2000
- Monolithic rotor and rigid coupling110US 6,398,525 B12002
- Vane type compressor having elliptical stator with doubly-offset rotor52US 4,410,305 AThe Rovac Corporation · 1983
- Rotary trochoidal compressor38US 4,018,548 ACurtiss-Wright Corporation · 1977