F04B 27/02
Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or
Official title: having cylinders arranged oppositely relative to main shaft
F04B27/02 (Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or) appears on 122 US grants and 124 published applications in this corpus.
Search patents in F04B- Granted patents
- 122
- Published applications
- 124
- Assignees
- 90
- Inventors
- 233
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 3 |
| 2002 | 4 | 1 |
| 2003 | 3 | 3 |
| 2004 | 4 | 3 |
| 2005 | 2 | 12 |
| 2006 | 3 | 3 |
| 2007 | 2 | 3 |
| 2008 | 5 | 3 |
| 2009 | 4 | 3 |
| 2010 | 2 | 2 |
| 2011 | 1 | 2 |
| 2012 | 3 | 2 |
| 2013 | 3 | 3 |
| 2014 | 2 | 5 |
| 2015 | 4 | 3 |
| 2016 | 2 | 5 |
| 2017 | 2 | 4 |
| 2018 | 4 | 8 |
| 2019 | 4 | 8 |
| 2020 | 7 | 10 |
| 2021 | 9 | 11 |
| 2022 | 5 | 4 |
| 2023 | 4 | 5 |
| 2024 | 7 | 6 |
| 2025 | 6 | 6 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Piston mounting and balancing system115US 6,832,900 B2Thomas Industries, Inc. · 2004
- Gas compressor construction and assembly109US 5,326,231 ABristol Compressors, Inc. · 1994
- Method and equipment for improving the efficiency of compressors and refrigerators94US 10,961,995 B22021
- Individual cogeneration plant and local network45US 7,124,586 B2MDI Motor Development International S.A. · 2006
- Reciprocatory piston and cylinder machines40US 4,102,608 ACommonwealth Scientific and Industrial Research Organization · 1978