F01C 21/108
With an axial surface
Official title: {with an axial surface, e.g. side plates}
F01C21/108 (With an axial surface) appears on 267 US grants and 311 published applications in this corpus.
Search patents in F01C- Granted patents
- 267
- Published applications
- 311
- Assignees
- 154
- Inventors
- 642
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 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 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 6 | 2 |
| 2002 | 2 | 0 |
| 2003 | 2 | 5 |
| 2004 | 2 | 12 |
| 2005 | 3 | 11 |
| 2006 | 6 | 10 |
| 2007 | 5 | 3 |
| 2008 | 8 | 11 |
| 2009 | 6 | 5 |
| 2010 | 6 | 6 |
| 2011 | 8 | 6 |
| 2012 | 3 | 5 |
| 2013 | 4 | 14 |
| 2014 | 5 | 19 |
| 2015 | 14 | 29 |
| 2016 | 12 | 22 |
| 2017 | 18 | 31 |
| 2018 | 26 | 23 |
| 2019 | 19 | 9 |
| 2020 | 18 | 15 |
| 2021 | 9 | 12 |
| 2022 | 18 | 18 |
| 2023 | 13 | 11 |
| 2024 | 23 | 17 |
| 2025 | 13 | 11 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fretting resistant rotary engine housings18 Aug 2026US 12,709,983 B2Pratt & Whitney Canada Corp.
- Moving wall multiphase compressor-pump-expander system21 Apr 2026US 12,607,188 B1
- Rotary pump with rotor bearing cap31 Mar 2026US 12,590,582 B2Unibloc Hygienic Technologies US, LLC
- Vane pump featuring fluid lubrication for an impeller17 Mar 2026US 12,577,949 B2Schwäbische Hüttenwerke Automotive GmbH
- Method of assembling parts with different coefficients of thermal expansion24 Feb 2026US 12,558,747 B2Pratt & Whitney Canada Corp.
- Rotary Engine Housing16 Jul 2026US 2026/0201831 A1Pratt & Whitney Canada Corp.
- Sinusoidal pump with blocking slide, and production method14 May 2026US 2026/0132788 A1Watson Marlow GmbH - MasoSine Division
- Housing assembly for rotary engine and method of manufacturing thereof19 Mar 2026US 2026/0078695 A1Pratt & Whitney Canada Corp.
- Vane pump with hydrostatic pressure plates12 Feb 2026US 2026/0043402 A1Eaton Intelligent Power Limited
- Screw pump and its components20 Nov 2025US 2025/0354551 A1Illinois Tool Works Inc.
Most cited
By later US patents
- Compressor pulse width modulation172US 6,213,731 B1Copeland Corporation · 2001
- Rotary vane pump with floating rotor side plates38US 4,804,317 AEaton Corporation · 1989
- Hermetic compressor assembly having a suction chamber and twin axially disposed discharge chambers32US 6,171,076 B2Tecumseh Products Company · 2001
- Rotary fluid pump or compressor23US 4,198,195 ANippon Piston Ring Co., Ltd. · 1980
- Water ring vacuum pump having adjustable part plates and a hollow impeller19US 4,637,780 APrescant Pty. Limited · 1987