F04C 29/0028
Internal leakage control
Official title: {Internal leakage control}
F04C29/0028 (Internal leakage control) appears on 42 US grants and 44 published applications in this corpus.
Search patents in F04C- Granted patents
- 42
- Published applications
- 44
- Assignees
- 40
- Inventors
- 122
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 2 |
| 2006 | 1 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 2 | 3 |
| 2016 | 1 | 1 |
| 2017 | 1 | 4 |
| 2018 | 0 | 3 |
| 2019 | 5 | 3 |
| 2020 | 1 | 6 |
| 2021 | 3 | 4 |
| 2022 | 6 | 2 |
| 2023 | 5 | 4 |
| 2024 | 3 | 5 |
| 2025 | 7 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Scavenge loss limiter for a rotary compressor12 May 2026US 12,624,696 B2Ingersoll-Rand Industrial U.S., Inc.
- Scroll compressor11 Nov 2025US 12,467,456 B2LG Electronics Inc.
- Back pressure regulating valve and an electric type of a scroll compressor with the same27 May 2025US 12,313,065 B2At Thermo Co., Ltd.
- Rotary compressor20 May 2025US 12,305,642 B2LG Electronics Inc.
- Device for controlling a fluid mass flow for a device for compressing a gaseous fluid and device for compressing a gaseous fluid6 May 2025US 12,292,051 B2Hanon Systems
- Thrust receiving mechanism22 Jan 2026US 2026/0022700 A1Eagle Industry Co., Ltd.
- Scavenge loss limiter for a rotary compressor21 Aug 2025US 2025/0264103 A1Ingersoll-Rand Industrial U.S., Inc.
- Back pressure regulating valve and an electric type of a scroll compressor with the same6 Mar 2025US 2025/0075701 A1ATECHELTHERMO Co., Ltd.
- Rotary compressor30 Jan 2025US 2025/0035113 A1LG Electronics Inc.
- Device for controlling a fluid mass flow for a device for compressing a gaseous fluid and device for compressing a gaseous fluid26 Dec 2024US 2024/0426301 A1Hanon Systems
Most cited
By later US patents
- Rotary screw compressor with oil drainage17US 5,037,282 ASvenska Rotor Maskiner AB · 1991
- Supercharger of an internal combustion engine having Roots pump10US 4,594,992 AToyota Jidosha Kabushiki Kaisha · 1986
- Rotary engine with housing having silicon carbide plate8US 11,613,995 B2Pratt & Whitney Canada Corp. · 2023
- Gapless screw rotor device8US 7,008,201 B2Imperial Research LLC · 2006
- Oil-cooled compressor7US 5,176,505 AKabushiki Kaisha Kobe Seiko Sho · 1993