F04C 27/009
Shaft sealings specially adapted for pumps
Official title: {Shaft sealings specially adapted for pumps}
F04C27/009 (Shaft sealings specially adapted for pumps) appears on 174 US grants and 161 published applications in this corpus.
Search patents in F04C- Granted patents
- 174
- Published applications
- 161
- Assignees
- 114
- Inventors
- 435
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 8 | 1 |
| 2002 | 5 | 14 |
| 2003 | 12 | 4 |
| 2004 | 2 | 6 |
| 2005 | 2 | 2 |
| 2006 | 2 | 3 |
| 2007 | 0 | 4 |
| 2008 | 1 | 9 |
| 2009 | 4 | 2 |
| 2010 | 4 | 5 |
| 2011 | 3 | 4 |
| 2012 | 2 | 11 |
| 2013 | 9 | 6 |
| 2014 | 5 | 6 |
| 2015 | 5 | 4 |
| 2016 | 5 | 3 |
| 2017 | 4 | 8 |
| 2018 | 3 | 8 |
| 2019 | 11 | 11 |
| 2020 | 5 | 10 |
| 2021 | 5 | 12 |
| 2022 | 10 | 5 |
| 2023 | 11 | 9 |
| 2024 | 9 | 3 |
| 2025 | 8 | 7 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Face seal assembly118US 6,325,380 B1Feodor Burgmann Dichtungswerke GmbH & Co. · 2001
- Shaft seals for a screw compressor62US 3,975,123 ASvenska Rotor Maskiner Aktiebolag · 1976
- Scroll compressors57US 6,506,036 B2Kabushiki Kaisha Toyota Jidoshokki · 2003
- Scroll compressors54US 6,464,481 B2Kabushiki Kaisha Toyota Jidoshokki · 2002
- Rotary screw compressor with shaft seal44US 5,641,280 ASvenska Rotor Maskiner AB · 1997