F04C 29/0007
Injection of a fluid in the working chamber for sealing, cooling and
Official title: {Injection of a fluid in the working chamber for sealing, cooling and lubricating (sealing only F04C27/00; lubrication only F04C29/02; cooling F02B47/02, F02D21/00, F02M25/00)}
F04C29/0007 (Injection of a fluid in the working chamber for sealing, cooling and) appears on 354 US grants and 305 published applications in this corpus.
Search patents in F04C- Granted patents
- 354
- Published applications
- 305
- Assignees
- 150
- Inventors
- 683
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 6 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 8 | 0 |
| 2001 | 12 | 2 |
| 2002 | 11 | 10 |
| 2003 | 8 | 9 |
| 2004 | 11 | 13 |
| 2005 | 3 | 3 |
| 2006 | 5 | 4 |
| 2007 | 4 | 4 |
| 2008 | 1 | 7 |
| 2009 | 0 | 6 |
| 2010 | 4 | 8 |
| 2011 | 4 | 6 |
| 2012 | 7 | 10 |
| 2013 | 7 | 3 |
| 2014 | 6 | 9 |
| 2015 | 6 | 8 |
| 2016 | 7 | 13 |
| 2017 | 7 | 12 |
| 2018 | 11 | 24 |
| 2019 | 10 | 17 |
| 2020 | 25 | 29 |
| 2021 | 18 | 19 |
| 2022 | 26 | 22 |
| 2023 | 18 | 16 |
| 2024 | 31 | 19 |
| 2025 | 16 | 18 |
| 2026 | 11 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Compressor structure2 Jun 2026US 12,644,457 B2Fu Sheng Industrial Co., Ltd.
- Compressor and additional oil injection system having same5 May 2026US 12,618,408 B2Atlas Copco (Wuxi) Compressor Co., Ltd.
- Airend having a lubricant flow valve and controller28 Apr 2026US 12,612,914 B2Ingersoll-Rand Industrial U.S., Inc.
- Compressor14 Apr 2026US 12,601,349 B2Valeo Japan Co., Ltd.
- Compressor assembly comprising a motor driving one or more compressor rotors and method for fabricating a housing part of such a compressor assembly31 Mar 2026US 12,590,586 B2Atlas Copco Airpower, Naamloze Vennootschap
- Gas Compressor20 Aug 2026US 2026/0243258 A1Hitachi Industrial Equipment Systems Co., Ltd.
- Scroll compressor13 Aug 2026US 2026/0235122 A1Hanon Systems
- Simultaneous compressor-expander13 Aug 2026US 2026/0235127 A1
- Electric compressor with integrated vapor injection circuit30 Jul 2026US 2026/0218703 A1Mahle International GmbH
- Air Compressor30 Jul 2026US 2026/0218705 A1Hitachi Industrial Equipment Systems Co., Ltd.
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