F04C 18/14
With toothed rotary pistons
Official title: with toothed rotary pistons
F04C18/14 (With toothed rotary pistons) appears on 1,155 US grants and 1,239 published applications in this corpus.
Search patents in F04C- Granted patents
- 1,155
- Published applications
- 1,239
- Assignees
- 373
- Inventors
- 1,759
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 9 | 0 |
| 1979 | 3 | 0 |
| 1980 | 9 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 6 | 0 |
| 1985 | 9 | 0 |
| 1986 | 8 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 8 | 0 |
| 1992 | 8 | 0 |
| 1993 | 7 | 0 |
| 1994 | 6 | 0 |
| 1995 | 8 | 0 |
| 1996 | 7 | 0 |
| 1997 | 13 | 0 |
| 1998 | 10 | 0 |
| 1999 | 10 | 0 |
| 2000 | 13 | 0 |
| 2001 | 19 | 11 |
| 2002 | 28 | 27 |
| 2003 | 34 | 27 |
| 2004 | 18 | 43 |
| 2005 | 22 | 32 |
| 2006 | 23 | 33 |
| 2007 | 11 | 26 |
| 2008 | 9 | 56 |
| 2009 | 20 | 42 |
| 2010 | 24 | 50 |
| 2011 | 27 | 30 |
| 2012 | 42 | 38 |
| 2013 | 29 | 41 |
| 2014 | 35 | 32 |
| 2015 | 32 | 51 |
| 2016 | 23 | 53 |
| 2017 | 38 | 75 |
| 2018 | 44 | 76 |
| 2019 | 70 | 82 |
| 2020 | 65 | 73 |
| 2021 | 62 | 75 |
| 2022 | 73 | 64 |
| 2023 | 59 | 56 |
| 2024 | 87 | 57 |
| 2025 | 68 | 56 |
| 2026 | 34 | 33 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air compressor29 Sep 2026US 12,747,730 B2Hitachi Industrial Equipment Systems Co., Ltd.
- Compressor device with cooling, and method for operating a compressor device29 Sep 2026US 12,747,731 B2Kaeser Kompressoren SE
- Supercharger22 Sep 2026US 12,742,412 B2Eaton Intelligent Power Limited
- Compressor system having integrated ambient sensor15 Sep 2026US 12,736,051 B2Kaeser Kompressoren SE
- Compressor and air conditioner8 Sep 2026US 12,729,685 B2Gree Electric Appliances, Inc. of Zhuhai
- Systems and methods for mobile compression8 Oct 2026US 2026/0309154 A1Artemis Production Solutions, Inc.
- Reversible Fluid Pump with Pressure Relief Mechanism17 Sep 2026US 2026/0275986 A1Illinois Tool Works Inc.
- Screw compressor, refrigeration system17 Sep 2026US 2026/0275988 A1Carrier Corporation
- Operation control method for engine driven compressor and engine driven compressor27 Aug 2026US 2026/0251144 A1Airman Corporation
- Gas Compressor20 Aug 2026US 2026/0243258 A1Hitachi Industrial Equipment Systems Co., Ltd.
Most cited
By later US patents
- Two stage screw type vacuum pump with motor in-between the stages140US 5,846,062 AEbara Corporation · 1998
- Compressor system with demand cooling110US 4,974,427 ACopeland Corporation · 1990
- Micro-processor control of a movable slide stop and a movable slide valve in a helical screw rotary compressor with an enconomizer inlet port77US 4,609,329 AFrick Company · 1986
- System and method for controlling screw compressors75US 6,017,192 A2000
- Vehicle mounted gas well pumping unit65US 6,626,646 B22003