F02G 2253/00
Seals
F02G2253/00 (Seals) appears on 169 US grants and 62 published applications in this corpus.
Search patents in F02G- Granted patents
- 169
- Published applications
- 62
- Assignees
- 65
- Inventors
- 221
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 8 | 0 |
| 1984 | 7 | 0 |
| 1985 | 2 | 0 |
| 1986 | 10 | 0 |
| 1987 | 13 | 0 |
| 1988 | 4 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 7 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 2 |
| 2004 | 1 | 1 |
| 2005 | 1 | 4 |
| 2006 | 4 | 3 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 5 |
| 2011 | 0 | 3 |
| 2012 | 0 | 0 |
| 2013 | 4 | 2 |
| 2014 | 3 | 5 |
| 2015 | 3 | 8 |
| 2016 | 2 | 1 |
| 2017 | 8 | 0 |
| 2018 | 3 | 5 |
| 2019 | 0 | 3 |
| 2020 | 3 | 5 |
| 2021 | 5 | 1 |
| 2022 | 3 | 5 |
| 2023 | 3 | 3 |
| 2024 | 3 | 0 |
| 2025 | 2 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F02G 2253/03Stem sealsIndexing code85
- F02G 2253/02Reciprocating piston sealsIndexing code44
- F02G 2253/08Stem with rolling membranesIndexing code24
- F02G 2253/80Sealing of the crankcaseIndexing code18
- F02G 2253/06Bellow sealsIndexing code16
- F02G 2253/04Displacer sealsIndexing code12
- F02G 2253/10Piston with rolling membranesIndexing code9
- F02G 2253/50Liquid sealsIndexing code6
Recent patents
- Gas energized seal for Gifford-McMahon expander26 May 2026US 12,638,220 B2Sumitomo (Shi) Cryogenic of America, Inc.
- Rod seal assemblies for machines with crossheads and sealed oscillating rods4 Feb 2025US 12,215,653 B2EnergyIntel Services Ltd.
- Waste heat recovery lube oil management7 Jan 2025US 12,188,431 B2Cummins Inc.
- Stirling cycle machine1 Oct 2024US 12,104,552 B2DEKA Products Limited Partnership
- Stirling cycle machine3 Sep 2024US 12,078,123 B2DEKA Products Limited Partnership
- Stirling cycle machine27 Feb 2025US 2025/0067230 A1DEKA Products Limited Partnership
- Stirling cycle machine23 Jan 2025US 2025/0027461 A1DEKA Products Limited Partnership
- Moteur thermique alternatif a culasse chaude et cylindre froid28 Sep 2023US 2023/0304456 A1
- Gas energized seal for gifford-mcmahon expander27 Apr 2023US 2023/0129966 A1Sumitomo (SHI) Cryogenics of America, Inc.
- Stirling Cycle Machine5 Jan 2023US 2023/0003174 A1New Power Concepts LLC
Most cited
By later US patents
- Micromachined rate and acceleration sensor127US 5,241,861 ASundstrand Corporation · 1993
- Shaft seal device39US 4,222,575 ANippon Piston Ring Co., Ltd. · 1980
- Micromachined rate and acceleration sensor36US 5,341,682 AAlliedSignal Inc. · 1994
- Crosshead system for stirling engine36US 5,771,694 AStirling Thermal Motors, Inc. · 1998
- Seal mechanism for a Stirling engine33US 4,736,586 AMitsubishi Denki Kabushiki Kaisha · 1988