F04C 27/00
Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
F04C27/00 (Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids) appears on 1,147 US grants and 1,059 published applications in this corpus.
Search patents in F04C- Granted patents
- 1,147
- Published applications
- 1,059
- Assignees
- 348
- Inventors
- 2,035
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 7 | 0 |
| 1984 | 7 | 0 |
| 1985 | 5 | 0 |
| 1986 | 7 | 0 |
| 1987 | 8 | 0 |
| 1988 | 9 | 0 |
| 1989 | 12 | 0 |
| 1990 | 11 | 0 |
| 1991 | 16 | 0 |
| 1992 | 17 | 0 |
| 1993 | 10 | 0 |
| 1994 | 12 | 0 |
| 1995 | 16 | 0 |
| 1996 | 19 | 0 |
| 1997 | 19 | 0 |
| 1998 | 21 | 0 |
| 1999 | 9 | 0 |
| 2000 | 39 | 0 |
| 2001 | 31 | 8 |
| 2002 | 25 | 37 |
| 2003 | 34 | 30 |
| 2004 | 27 | 29 |
| 2005 | 18 | 24 |
| 2006 | 17 | 33 |
| 2007 | 15 | 29 |
| 2008 | 22 | 38 |
| 2009 | 18 | 28 |
| 2010 | 20 | 38 |
| 2011 | 25 | 36 |
| 2012 | 19 | 35 |
| 2013 | 32 | 34 |
| 2014 | 26 | 54 |
| 2015 | 38 | 54 |
| 2016 | 32 | 45 |
| 2017 | 48 | 53 |
| 2018 | 45 | 48 |
| 2019 | 45 | 68 |
| 2020 | 41 | 65 |
| 2021 | 63 | 49 |
| 2022 | 44 | 45 |
| 2023 | 53 | 62 |
| 2024 | 70 | 44 |
| 2025 | 54 | 42 |
| 2026 | 22 | 31 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F04C 27/005Axial sealings for working fluid670
- F04C 27/008Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids: for other332
- F04C 27/001Radial sealings for working fluid177
- F04C 27/02Liquid sealing for high-vacuum pumps or for compressors58
- F04C 27/007Sealings for working fluid between radially and axially moving parts27
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Most cited
By later US patents
- Scroll-type machine with axially compliant mounting226US 4,877,382 ACopeland Corporation · 1989
- Adaptive control for a refrigeration system using pulse width modulated duty cycle scroll compressor194US 6,047,557 ACopeland Corporation · 2000
- Compressor pulse width modulation172US 6,213,731 B1Copeland Corporation · 2001
- Capacity modulated scroll machine162US 5,613,841 ACopeland Corporation · 1997
- Capacity modulated scroll machine156US 5,741,120 ACopeland Corporation · 1998