F04C 18/52
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
F04C18/52 (Of intermeshing engagement type, i.e. with engagement of co-operating members similar to) appears on 77 US grants and 73 published applications in this corpus.
Search patents in F04C- Granted patents
- 77
- Published applications
- 73
- Assignees
- 19
- Inventors
- 73
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 13 |
| 2011 | 1 | 4 |
| 2012 | 4 | 6 |
| 2013 | 9 | 4 |
| 2014 | 6 | 1 |
| 2015 | 7 | 1 |
| 2016 | 1 | 1 |
| 2017 | 1 | 1 |
| 2018 | 3 | 1 |
| 2019 | 0 | 3 |
| 2020 | 0 | 5 |
| 2021 | 5 | 5 |
| 2022 | 3 | 5 |
| 2023 | 3 | 4 |
| 2024 | 7 | 3 |
| 2025 | 7 | 6 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Low ratio oil injection port for applications without the requirement of an oil pump10 Feb 2026US 12,546,316 B1Copeland Industrial LP
- Screw compressor and refrigeration apparatus25 Nov 2025US 12,480,492 B2Daikin Industries, Ltd.
- Screw compressor and refrigeration apparatus7 Oct 2025US 12,435,719 B2Daikin Industries, Ltd.
- Single screw compressor30 Sep 2025US 12,429,051 B2Paralloid Gear Co., Ltd.
- Method for manufacturing screw rotor12 Aug 2025US 12,383,966 B2Daikin Industries, Ltd.
- Low ratio oil injection port for applications without the requirement of an oil pump12 Feb 2026US 2026/0043404 A1Copeland Industrial LP
- Screw compressor22 Jan 2026US 2026/0022701 A1Daikin Industries, Ltd.
- Screw compressor and refrigeration apparatus15 Jan 2026US 2026/0016006 A1Daikin Industries, Ltd.
- Screw compressor8 Jan 2026US 2026/0009383 A1Daikin Industries, Ltd.
- Compressor/Expander Machine6 Feb 2025US 2025/0044007 A1BITZER Kuehlmaschinenbau GmbH
Most cited
By later US patents
- Rotary screw gas compressor having dual slide valves26US 4,610,612 AVilter Manufacturing Corporation · 1986
- Control means for gas compressor having dual slide valves22US 4,610,613 AVilter Manufacturing Corporation · 1986
- Method for operating dual slide valve rotary gas compressor22US 4,704,069 AVilter Manufacturing Corporation · 1987
- Compressor having a dual slide valve assembly13US 7,891,955 B2Vilter Manufacturing Corporation · 2011
- Single screw compressor12US 6,398,532 B12002