F02G 2253/50
Liquid seals
F02G2253/50 (Liquid seals) appears on 6 US grants and 0 published applications in this corpus.
Search patents in F02G- Granted patents
- 6
- Published applications
- 0
- Assignees
- 5
- Inventors
- 9
- Latest grant
- 3 Oct 1989
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Reciprocation apparatus with sealing mechanism3 Oct 1989US 4,870,821 AMatsushita Electric Industrial Co., Ltd.
- Rod seal device for stirling engines22 Sep 1987US 4,694,707 AAisin Seiki Kabushiki Kaisha
- Rod seal device for stirling engines8 Sep 1987US 4,691,591 AAisin Seiki Kabushiki Kaisha
- Seal for piston rod of Stirling engine14 Jan 1986US 4,564,202 AAisin Seiki Kabushiki Kaisha
- Stirling cycle engine having shaft seal means20 Nov 1984US 4,483,141 AAisin Seiki Kabushika
No published applications in this class yet.
Most cited
By later US patents
- Rolling diaphragm seal between two relatively moving parts28US 3,934,480 AU. S. Philips Corporation · 1976
- Stirling cycle engine having shaft seal means10US 4,483,141 AAisin Seiki Kabushika · 1984
- Reciprocation apparatus with sealing mechanism6US 4,870,821 AMatsushita Electric Industrial Co., Ltd. · 1989
- Seal for piston rod of Stirling engine4US 4,564,202 AAisin Seiki Kabushiki Kaisha · 1986
- Rod seal device for stirling engines1US 4,691,591 AAisin Seiki Kabushiki Kaisha · 1987