F04C 18/3446
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}
F04C18/3446 (The inner and outer member being in contact along more than one) appears on 76 US grants and 66 published applications in this corpus.
Search patents in F04C- Granted patents
- 76
- Published applications
- 66
- Assignees
- 49
- Inventors
- 202
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 6 |
| 2003 | 6 | 5 |
| 2004 | 3 | 4 |
| 2005 | 4 | 4 |
| 2006 | 2 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 3 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 2 | 3 |
| 2013 | 1 | 5 |
| 2014 | 0 | 2 |
| 2015 | 6 | 7 |
| 2016 | 2 | 2 |
| 2017 | 5 | 1 |
| 2018 | 2 | 3 |
| 2019 | 0 | 3 |
| 2020 | 0 | 2 |
| 2021 | 1 | 6 |
| 2022 | 8 | 3 |
| 2023 | 3 | 0 |
| 2024 | 1 | 0 |
| 2025 | 2 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Rotary radial vane compressor21 Oct 2025US 12,448,969 B2
- Pump for evaporative emissions system28 Jan 2025US 12,209,561 B2Stoneridge Electronics AB
- Vane pump16 Jan 2024US 11,873,815 B2Hella GmbH & Co. KGaA
- Rotary compressor with unequally spaced vane slots22 Aug 2023US 11,732,584 B2LG Electronics Inc.
- Vane compressor with an improved lubrication system1 Aug 2023US 11,713,759 B2Ing. Enea Mattei S.P.A.
- Rotary compressor and refrigeration cycle apparatus18 Jun 2026US 2026/0168496 A1Carrier Japan Corporation
- Method for Operating a Vacuum Pump, as well as a Vacuum Pump Designed for this Purpose with Two Inlets and One Outlet, its Use and Vacuum Packaging Machines Equipped Therewith18 Dec 2025US 2025/0382961 A1
- Rotary radial vane compressor7 Aug 2025US 2025/0250980 A1
- Pump for evaporative emissions system22 Dec 2022US 2022/0403801 A1Stoneridge Control Devices, Inc.
- Rotary compressor21 Jul 2022US 2022/0228587 A1LG Electronics Inc.
Most cited
By later US patents
- Unitary sliding vane compressor-expander and electrical generation system38US 6,589,033 B1Phoenix Analysis and Design Technologies, Inc. · 2003
- High performance dual chamber rotary vane compressor32US 5,302,096 A1994
- Sliding vane compressor24US 4,384,828 ARobert Bosch GmbH · 1983
- Vane compressor without occurrence of vane chattering23US 4,802,830 ADiesel Kiki Co., Ltd. · 1989
- Rotary compressor with heating passage between discharge chamber and shaft seal15US 4,743,184 ADiesel Kiki Co., Ltd. · 1988