F04C 29/0014
With control systems for the injection of the fluid
Official title: {with control systems for the injection of the fluid}
F04C29/0014 (With control systems for the injection of the fluid) appears on 133 US grants and 108 published applications in this corpus.
Search patents in F04C- Granted patents
- 133
- Published applications
- 108
- Assignees
- 66
- Inventors
- 259
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 9 | 2 |
| 2002 | 6 | 7 |
| 2003 | 4 | 4 |
| 2004 | 6 | 7 |
| 2005 | 1 | 3 |
| 2006 | 3 | 1 |
| 2007 | 3 | 1 |
| 2008 | 0 | 4 |
| 2009 | 0 | 1 |
| 2010 | 2 | 3 |
| 2011 | 1 | 3 |
| 2012 | 3 | 3 |
| 2013 | 3 | 1 |
| 2014 | 3 | 1 |
| 2015 | 3 | 4 |
| 2016 | 1 | 6 |
| 2017 | 2 | 3 |
| 2018 | 3 | 11 |
| 2019 | 3 | 5 |
| 2020 | 12 | 9 |
| 2021 | 8 | 6 |
| 2022 | 6 | 7 |
| 2023 | 7 | 7 |
| 2024 | 9 | 3 |
| 2025 | 4 | 4 |
| 2026 | 4 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Airend having a lubricant flow valve and controller28 Apr 2026US 12,612,914 B2Ingersoll-Rand Industrial U.S., Inc.
- Low ratio oil injection port for applications without the requirement of an oil pump10 Feb 2026US 12,546,316 B1Copeland Industrial LP
- Oil-injected compressor device13 Jan 2026US 12,523,226 B2Atlas Copco Airpower, Naamloze Vennootschap
- Rotary screw compressor13 Jan 2026US 12,523,227 B2Ingersoll-Rand Industrial U.S., Inc.
- Vacuum line and method for controlling a vacuum line to reduce explosion potential via injection of diluent gas to lower flammable gas concentration16 Dec 2025US 12,496,563 B2Pfeiffer Vacuum GmbH
- Gas Compressor20 Aug 2026US 2026/0243258 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Low ratio oil injection port for applications without the requirement of an oil pump12 Feb 2026US 2026/0043404 A1Copeland Industrial LP
- Direct drive refrigerant screw compressor with refrigerant lubricated rotors6 Nov 2025US 2025/0341213 A1Carrier Corporation
- Airend having a lubricant flow valve and controller19 Jun 2025US 2025/0198407 A1Ingersoll-Rand Industrial U.S., Inc.
- Oil-injected compressor device27 Feb 2025US 2025/0067266 A1Atlas Copco Airpower, Naamloze Vennootschap
Most cited
By later US patents
- Compressor with control and protection system115US 6,302,654 B1Copeland Corporation · 2001
- Solid state compressor control system114US 4,227,862 AFrick Company · 1980
- Method and apparatus for the control of economizer circuit flow for optimum performance95US 6,474,087 B1Carrier Corporation · 2002
- Compressor control system and method82US 6,082,971 AIngersoll-Rand Company · 2000
- Solid state compressor control system80US 4,336,001 AFrick Company · 1982