F04C 2/344
With vanes reciprocating with respect to the inner member
Official title: with vanes reciprocating with respect to the inner member
F04C2/344 (With vanes reciprocating with respect to the inner member) appears on 861 US grants and 921 published applications in this corpus.
Search patents in F04C- Granted patents
- 861
- Published applications
- 921
- Assignees
- 338
- Inventors
- 1,428
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 15 | 0 |
| 1986 | 7 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 7 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 7 | 0 |
| 1997 | 9 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 18 | 0 |
| 2001 | 11 | 6 |
| 2002 | 25 | 16 |
| 2003 | 20 | 17 |
| 2004 | 12 | 20 |
| 2005 | 10 | 25 |
| 2006 | 13 | 18 |
| 2007 | 11 | 18 |
| 2008 | 15 | 36 |
| 2009 | 15 | 51 |
| 2010 | 18 | 35 |
| 2011 | 26 | 28 |
| 2012 | 29 | 32 |
| 2013 | 37 | 52 |
| 2014 | 22 | 45 |
| 2015 | 39 | 74 |
| 2016 | 47 | 67 |
| 2017 | 62 | 67 |
| 2018 | 58 | 65 |
| 2019 | 39 | 35 |
| 2020 | 40 | 49 |
| 2021 | 27 | 42 |
| 2022 | 38 | 44 |
| 2023 | 47 | 30 |
| 2024 | 35 | 18 |
| 2025 | 22 | 21 |
| 2026 | 11 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F04C 2/3441The inner and outer member being in contact along one line or380
- F04C 2/3446The inner and outer member being in contact along more than one231
- F04C 2/3448With axially movable vanes46
- F04C 2/348The vanes positively engaging, with circumferential play, an outer rotatable member32
- F04C 2/352The vanes being pivoted on the axis of the outer member16
Recent patents
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- Sliding vane pump or turbine having track followers11 Aug 2026US 12,704,069 B2Amorphic Tech Ltd
- Pump assembly7 Jul 2026US 12,674,453 B2Sumitomo Electric Sintered Alloy, Ltd.
- Adding system for fire-extinguishing units26 May 2026US 12,636,532 B2Firedos GmbH
- Hydraulic pump and module formed from such a hydraulic pump and a receptacle12 May 2026US 12,624,706 B2Valeo Powertrain GmbH
- Vane pump10 Sep 2026US 2026/0266287 A1KYB Corporation
- Pump assembly2 Jul 2026US 2026/0185523 A1Sumitomo Electric Sintered Alloy, Ltd.
- Lubrication system for an internal combustion engine25 Jun 2026US 2026/0176992 A1DAF Trucks N. V.
- Electric compressor30 Apr 2026US 2026/0117770 A1Kabushiki Kaisha Toyota Jidoshokki
- Vane for a vane cell machine, method for producing vanes, and vane cell machine5 Mar 2026US 2026/0063037 A1
Most cited
By later US patents
- Overheat protection for fluid pump89US 6,837,688 B2Standex International Corporation · 2005
- Reverse osmosis with free rotor booster pump74US 4,973,408 A1990
- Rotary pump having a hydraulic intermediate capacity with first and second connections48US 6,817,847 B2LuK Fahrzeug-Hydraulik GmbH & Co.KG · 2004
- Reduced rotor assembly diameter vane pump47US 7,997,882 B2MAGNA Powertrain AG & Co KG · 2011
- Combined pump and motor device45US 6,247,906 B12001