F04C 2/3446
The inner and outer member being in contact along more than one
Official title: {the inner and outer member being in contact along more than one line or surface}
F04C2/3446 (The inner and outer member being in contact along more than one) appears on 231 US grants and 222 published applications in this corpus.
Search patents in F04C- Granted patents
- 231
- Published applications
- 222
- Assignees
- 114
- Inventors
- 401
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 9 | 0 |
| 2001 | 5 | 3 |
| 2002 | 17 | 11 |
| 2003 | 12 | 13 |
| 2004 | 8 | 9 |
| 2005 | 7 | 7 |
| 2006 | 7 | 5 |
| 2007 | 1 | 4 |
| 2008 | 4 | 8 |
| 2009 | 4 | 6 |
| 2010 | 2 | 5 |
| 2011 | 6 | 5 |
| 2012 | 1 | 2 |
| 2013 | 6 | 8 |
| 2014 | 3 | 14 |
| 2015 | 7 | 15 |
| 2016 | 11 | 14 |
| 2017 | 12 | 25 |
| 2018 | 14 | 17 |
| 2019 | 12 | 5 |
| 2020 | 11 | 7 |
| 2021 | 3 | 11 |
| 2022 | 9 | 10 |
| 2023 | 8 | 9 |
| 2024 | 9 | 4 |
| 2025 | 4 | 1 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sliding vane pump or turbine having track followers11 Aug 2026US 12,704,069 B2Amorphic Tech Ltd
- Hydraulic pump and module formed from such a hydraulic pump and a receptacle12 May 2026US 12,624,706 B2Valeo Powertrain GmbH
- Electric motor with dual pump for providing scavenge and delivery functions8 Apr 2025US 12,270,396 B2GHSP, Inc.
- Constant-flow pulseless rotary-vane-type displacement machine18 Feb 2025US 12,228,134 B2
- Multi-chamber configuration for hydraulic vane device14 Jan 2025US 12,196,085 B2Mathers Hydraulics Technologies Pty Ltd
- Vane pump10 Sep 2026US 2026/0266287 A1KYB Corporation
- Vane for a vane cell machine, method for producing vanes, and vane cell machine5 Mar 2026US 2026/0063037 A1
- Displacement Power Controllers and Applications5 Mar 2026US 2026/0063150 A1Perisseuma Technologies LLC
- Rotary vane pump vane wear detection26 Feb 2026US 2026/0055763 A1Goodrich Corporation
- Kidney port configurations in port plates for balanced vanes27 Mar 2025US 2025/0101977 A1Hamilton Sundstrand Corporation
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
- Fluid circulation path for motor pump36US 6,884,043 B2Standex International Corporation · 2005
- Fixed displacement vane pump with undervane pumping34US 4,354,809 AChandler Evans Inc. · 1982