F04C 18/56
Of intermeshing engagement type, i.e. with engagement of co-operating members similar to
Official title: of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
F04C18/56 (Of intermeshing engagement type, i.e. with engagement of co-operating members similar to) appears on 14 US grants and 13 published applications in this corpus.
Search patents in F04C- Granted patents
- 14
- Published applications
- 13
- Assignees
- 8
- Inventors
- 17
- Latest grant
- 31 Dec 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 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 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 1 |
| 2012 | 2 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 2 | 3 |
| 2020 | 0 | 2 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 1 | 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
- Rotary fluid flow device28 Mar 2023US 11,614,089 B2
- Rotary fluid flow device13 Apr 2021US 10,975,869 B2Exponential Technologies, Inc.
- Rotor for a positive displacement compressor24 Dec 2019US 10,514,036 B2GM Global Technology Operations LLC
- 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
- Rotary Fluid Flow Device30 Sep 2021US 2021/0301825 A1
- Steam compressor comprising a dry positive-displacement unit as a spindle compressor10 Dec 2020US 2020/0386228 A1
Most cited
By later US patents
- Worm-type rotary fluid compressor14US 4,373,881 AIwata Air Compressor Manufacturing Company Ltd. · 1983
- 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
- Rotor for a positive displacement compressor4US 10,514,036 B2GM Global Technology Operations LLC · 2019
- Rotary fluid flow device3US 10,975,869 B2Exponential Technologies, Inc. · 2021