F02G 2253/04
Displacer seals
F02G2253/04 (Displacer seals) appears on 12 US grants and 9 published applications in this corpus.
Search patents in F02G- Granted patents
- 12
- Published applications
- 9
- Assignees
- 7
- Inventors
- 29
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 2 | 3 |
| 2016 | 2 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 2 |
| 2021 | 2 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Gas energized seal for Gifford-McMahon expander26 May 2026US 12,638,220 B2Sumitomo (Shi) Cryogenic of America, Inc.
- Closed cycle regenerative heat engines20 Dec 2022US 11,530,668 B2Stirling Works Global Ltd
- Closed cycle regenerative heat engines1 Jun 2021US 11,022,067 B2Stirling Works Global Ltd
- Closed cycle regenerative heat engines12 Jan 2021US 10,890,138 B2Stirling Works Global Ltd
- Efficient stirling engine25 Dec 2018US 10,161,355 B2Jiangsu Source Wing Electric Co., Ltd.
- Gas energized seal for gifford-mcmahon expander27 Apr 2023US 2023/0129966 A1Sumitomo (SHI) Cryogenics of America, Inc.
- Closed Cycle Regenerative Heat Engines9 Sep 2021US 2021/0277846 A1Stirling Works Global Ltd
- Closed Cycle Regenerative Heat Engines30 Jul 2020US 2020/0240358 A1Stirling Works Global Ltd
- Closed Cycle Regenerative Heat Engines19 Mar 2020US 2020/0088131 A1Stirling Works Global Ltd
- Efficient stirling engine22 Feb 2018US 2018/0051651 A1Jiangsu Source Wing Electric Co., Ltd.
Most cited
By later US patents
- Seal mechanism for a Stirling engine33US 4,736,586 AMitsubishi Denki Kabushiki Kaisha · 1988
- Polymerization process for polyester7US 4,687,811 AMitsubishi Rayon Co., Ltd. · 1987
- Transposed compression piston and cylinder5US 5,103,643 A1992
- Stirling machine2US 9,109,533 B22015
- Sealing device and sealing structure2US 9,157,530 B2Nok Corporation · 2015