F04C 5/00
Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently
Official title: Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently deformable (such pumps specially adapted for elastic fluids F04C18/00)
F04C5/00 (Rotary-piston machines or pumps with the working-chamber walls at least partly resiliently) appears on 133 US grants and 130 published applications in this corpus.
Search patents in F04C- Granted patents
- 133
- Published applications
- 130
- Assignees
- 86
- Inventors
- 221
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 4 |
| 2002 | 2 | 0 |
| 2003 | 2 | 1 |
| 2004 | 1 | 2 |
| 2005 | 0 | 1 |
| 2006 | 3 | 2 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 0 | 4 |
| 2010 | 2 | 3 |
| 2011 | 1 | 4 |
| 2012 | 8 | 4 |
| 2013 | 0 | 1 |
| 2014 | 1 | 6 |
| 2015 | 3 | 5 |
| 2016 | 1 | 11 |
| 2017 | 9 | 11 |
| 2018 | 9 | 15 |
| 2019 | 14 | 6 |
| 2020 | 9 | 7 |
| 2021 | 5 | 10 |
| 2022 | 7 | 9 |
| 2023 | 5 | 5 |
| 2024 | 5 | 12 |
| 2025 | 10 | 3 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Moving wall multiphase compressor-pump-expander system21 Apr 2026US 12,607,188 B1
- Devices for dispensing fluids24 Mar 2026US 12,583,003 B2PSG Germany GmbH
- Pump and method to attenuate pulses at the discharge24 Mar 2026US 12,584,483 B2Magpumps Limited
- Rotary pump or motor with improved intake, exhaust, vane and bearingless sleeve features7 Oct 2025US 12,435,717 B2
- Fluid transfer pump7 Oct 2025US 12,435,723 B2Techtronic Cordless GP
- Rotary pump or motor with improved intake, exhaust, vane and bearingless sleeve features4 Dec 2025US 2025/0369440 A1
- Pumps13 Nov 2025US 2025/0347277 A1PSG Germany GmbH
- Pumps15 May 2025US 2025/0154953 A1PSG Germany GmbH
- Rotary fluid transfer pump apparatus, kit and system12 Dec 2024US 2024/0410365 A1JS2 Enterprises, LLC
- Condensate pump assembly5 Dec 2024US 2024/0401590 A1Aspen Pumps Limited
Most cited
By later US patents
- Pump112US 6,398,522 B2Photosynthesis (Jersey) Limited · 2002
- Auto suction hybrid pump99US 7,014,417 B2Horn GmbH & Co. KG · 2006
- Dry running flexible impeller pump and method of manufacture90US 7,866,942 B22011
- Pump with conveying chamber formed in outer rotor surface55US 7,674,100 B2PDD Innovations Ltd. · 2010
- Cooling water pump device for outboard motor48US 6,984,158 B2Suzuki Motor Corporation · 2006