F04C 18/54
The axes being arranged otherwise than at an angle of 90 degrees
Official title: the axes being arranged otherwise than at an angle of 90 degrees
F04C18/54 (The axes being arranged otherwise than at an angle of 90 degrees) appears on 21 US grants and 19 published applications in this corpus.
Search patents in F04C- Granted patents
- 21
- Published applications
- 19
- Assignees
- 14
- Inventors
- 26
- Latest grant
- 31 Dec 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 1 |
| 2012 | 2 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 2 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 3 | 4 |
| 2020 | 0 | 2 |
| 2021 | 2 | 1 |
| 2022 | 0 | 1 |
| 2023 | 2 | 1 |
| 2024 | 2 | 1 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Rotary positive displacement device31 Dec 2024US 12,180,960 B2Spherical Rotors Inc.
- Volume ratio for a R718* compressor18 Jun 2024US 12,012,961 B2R-718 Spindel Gbr
- Hydrostatic pressure support for spherical pump rotor and spherical pump with same31 Oct 2023US 11,802,560 B2Shenzhen Spherical Fluid Power Technology Co., Ltd.
- Rotary fluid flow device28 Mar 2023US 11,614,089 B2
- Rotary fluid flow device13 Apr 2021US 10,975,869 B2Exponential Technologies, Inc.
- Screw compressor and freezer9 Jan 2025US 2025/0012278 A1Daikin Industries, Ltd.
- Rotary positive displacement device21 Nov 2024US 2024/0384720 A1Spherical Rotors Inc.
- Volume ratio for a r718* compressor1 Jun 2023US 2023/0167823 A1R-718 Spindel Gbr
- Hydrostatic pressure support for spherical pump rotor and spherical pump with same11 Aug 2022US 2022/0252068 A1Shenzhen Ansonpower Technology Co., Ltd.
- Rotary Fluid Flow Device30 Sep 2021US 2021/0301825 A1
Most cited
By later US patents
- Worm-type rotary fluid compressor14US 4,373,881 AIwata Air Compressor Manufacturing Company Ltd. · 1983
- Rotary compressor or motor with rotors having interengaging blades and recesses12US 4,252,511 A1981
- Single screw compressor12US 6,398,532 B12002
- High pressure single screw compressors7US 4,981,424 AThe United States of America as represented by the Secretary of the Navy · 1991
- Twin-plate rotary compressor6US 7,726,960 B2Nanyang Technological University · 2010