F04C 27/001
Radial sealings for working fluid
Official title: {Radial sealings for working fluid}
F04C27/001 (Radial sealings for working fluid) appears on 177 US grants and 206 published applications in this corpus.
Search patents in F04C- Granted patents
- 177
- Published applications
- 206
- Assignees
- 100
- Inventors
- 433
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 4 |
| 2004 | 5 | 4 |
| 2005 | 2 | 7 |
| 2006 | 1 | 0 |
| 2007 | 4 | 4 |
| 2008 | 2 | 7 |
| 2009 | 2 | 5 |
| 2010 | 3 | 6 |
| 2011 | 3 | 8 |
| 2012 | 2 | 6 |
| 2013 | 6 | 5 |
| 2014 | 5 | 14 |
| 2015 | 8 | 17 |
| 2016 | 4 | 17 |
| 2017 | 14 | 14 |
| 2018 | 15 | 15 |
| 2019 | 12 | 12 |
| 2020 | 10 | 8 |
| 2021 | 14 | 11 |
| 2022 | 9 | 6 |
| 2023 | 7 | 13 |
| 2024 | 16 | 9 |
| 2025 | 13 | 9 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Compressor sealing element arrangement near stator for controlling a gaseous fluid flow therethrough8 Sep 2026US 12,729,686 B2Hanon Systems
- Sealing gasket with one or more positioning protrusions7 Jul 2026US 12,674,457 B2Edwards Limited
- Shell stator for a vacuum pump14 Apr 2026US 12,601,261 B2Edwards Limited
- Hermetic compressor with cylinder having elliptical inner circumferential surface, roller, and at least one vane7 Apr 2026US RE50,855 E1LG Electronics Inc.
- Scroll assemblies and compressors including the same18 Nov 2025US 12,473,917 B2Copeland Corporation
- Scroll compressor13 Aug 2026US 2026/0235122 A1Hanon Systems
- Predicting tip seal wear in scroll pump23 Jul 2026US 2026/0210358 A1Agilent Technologies, Inc.
- Scroll compressor5 Feb 2026US 2026/0036127 A1
- Screw compressor22 Jan 2026US 2026/0022701 A1Daikin Industries, Ltd.
- Shell stator for a vacuum pump4 Dec 2025US 2025/0369356 A1Edwards Limited
Most cited
By later US patents
- Compressor seal assembly46US 8,932,036 B2Emerson Climate Technologies, Inc. · 2015
- Rotary trochoidal compressor38US 4,018,548 ACurtiss-Wright Corporation · 1977
- Rotary pump with wiper insert38US 6,053,717 A2000
- Apparatus having refrigeration cycle25US 6,082,132 AMatsushita Electric Industrial Co., Ltd. · 2000
- Scroll compressor with control of distance between driving and driven scroll axes24US 4,753,582 AMitsubishi Denki Kabushiki Kaisha · 1988