F04C 2/088
Elements in the toothed wheels or the carter for relieving the pressure
Official title: {Elements in the toothed wheels or the carter for relieving the pressure of fluid imprisoned in the zones of engagement}
F04C2/088 (Elements in the toothed wheels or the carter for relieving the pressure) appears on 66 US grants and 67 published applications in this corpus.
Search patents in F04C- Granted patents
- 66
- Published applications
- 67
- Assignees
- 59
- Inventors
- 174
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 3 |
| 2005 | 0 | 4 |
| 2006 | 0 | 0 |
| 2007 | 0 | 4 |
| 2008 | 3 | 3 |
| 2009 | 1 | 2 |
| 2010 | 2 | 4 |
| 2011 | 2 | 1 |
| 2012 | 1 | 3 |
| 2013 | 3 | 2 |
| 2014 | 2 | 2 |
| 2015 | 4 | 3 |
| 2016 | 2 | 2 |
| 2017 | 2 | 6 |
| 2018 | 6 | 7 |
| 2019 | 3 | 4 |
| 2020 | 4 | 5 |
| 2021 | 6 | 2 |
| 2022 | 2 | 2 |
| 2023 | 2 | 1 |
| 2024 | 1 | 2 |
| 2025 | 1 | 3 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Volume expansion for cavitation reduction in a gear pump mesh2 Dec 2025US 12,486,843 B2Triumph Engine Control Systems, LLC
- Positive displacement pump with pressure relief7 May 2024US 11,976,659 B2
- Gear pump with floating bearing with receiver faces26 Dec 2023US 11,852,142 B2IHI Corporation
- Hydraulic pump to synchronize the operation of a pair of hydraulic actuators24 Oct 2023US 11,795,944 B1JL Marine Systems, Inc.
- System to pump fluid and control thereof9 Aug 2022US 11,408,442 B2Project Phoenix, LLC
- Hig outer rotor shadow pockets21 May 2026US 2026/0139670 A1Hanon Systems EFP Canada Ltd.
- Positive displacement pump with pressure relief26 Jun 2025US 2025/0207582 A1
- Gear pump or gear motor26 Jun 2025US 2025/0207585 A1Daikin Industries, Ltd.
- Gerotor Pump And Motor/Pump Unit9 Jan 2025US 2025/0012275 A1Thomas Magnete GmbH
- Positive displacement pump with pressure relief24 Oct 2024US 2024/0352930 A1
Most cited
By later US patents
- Helical gear pump or gear motor with optimal relief grooves for trapped fluid27US 4,290,739 A1981
- Gear pump or motor with bypass throttle passage to prevent cavitation23US 4,097,206 ARobert Bosch GmbH · 1978
- Gear pump for high viscosity materials20US 5,190,450 AEastman Kodak Company · 1993
- Gear pump cavitation reduction18US 7,878,781 B2Hamilton Sundstrand Corporation · 2011
- Gerotor pump having inlet and outlet relief ports16US 5,733,111 AFord Global Technologies, LLC · 1998