F04C 15/064
With inlet and outlet valves specially adapted for rotary or oscillating piston
Official title: {with inlet and outlet valves specially adapted for rotary or oscillating piston machines or pumps}
F04C15/064 (With inlet and outlet valves specially adapted for rotary or oscillating piston) appears on 103 US grants and 110 published applications in this corpus.
Search patents in F04C- Granted patents
- 103
- Published applications
- 110
- Assignees
- 91
- Inventors
- 237
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 4 |
| 2006 | 1 | 0 |
| 2007 | 3 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 3 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 3 | 6 |
| 2014 | 4 | 6 |
| 2015 | 1 | 11 |
| 2016 | 3 | 4 |
| 2017 | 4 | 12 |
| 2018 | 6 | 10 |
| 2019 | 7 | 4 |
| 2020 | 8 | 13 |
| 2021 | 10 | 7 |
| 2022 | 8 | 7 |
| 2023 | 6 | 5 |
| 2024 | 6 | 7 |
| 2025 | 7 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Rotary piston machine3 Feb 2026US 12,540,572 B2
- Pre-pressurized system with reverse rotation of pump for valve actuation16 Dec 2025US 12,497,957 B2Johnson Electric Motion Technology Canada Ltd.
- Metering distribution assembly and coating system comprising the same21 Oct 2025US 12,448,964 B2Nordson Corporation
- X-ray inspection apparatus used for an inspection of a substrate, X-ray inspection system, image management method and program2 Sep 2025US 12,405,232 B2OMRON Corporation
- Hydraulic pump with two-stage operation19 Aug 2025US 12,392,331 B2Enerpac Tool Group Corp.
- Rotating screw machine with discharge plate30 Apr 2026US 2026/0117769 A1City St George's, University of London
- Rotary Pump19 Jun 2025US 2025/0198405 A1ECO Holding 1 GmbH
- Rotary piston machine10 Apr 2025US 2025/0116223 A1
- Fluid circulating apparatus26 Dec 2024US 2024/0426295 A1Coavis
- Primer pump assembly and a method of cooling a marine vessel17 Oct 2024US 2024/0344519 A1AB Volvo Penta
Most cited
By later US patents
- Vehicle drivetrain hydraulic coupling70US 5,310,388 AASHA Corporation · 1994
- Hydraulic coupling for vehicle drivetrain54US 5,595,214 AASHA Corporation · 1997
- Hydraulic coupling for vehicle drivetrain53US 5,536,215 AASHA Corporation · 1996
- Gerotor pump having an eccentric ring housing with an integral pressure chamber45US 6,648,611 B2Torque-Traction Technologies, Inc. · 2003
- Hydraulic coupling for vehicle drivetrain35US 5,735,764 AASHA Corporation · 1998