F04C 2/101
With a crescent-shaped filler element, located between the inner and outer intermeshing
Official title: {with a crescent-shaped filler element, located between the inner and outer intermeshing members}
F04C2/101 (With a crescent-shaped filler element, located between the inner and outer intermeshing) appears on 131 US grants and 96 published applications in this corpus.
Search patents in F04C- Granted patents
- 131
- Published applications
- 96
- Assignees
- 88
- Inventors
- 223
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 5 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 4 | 0 |
| 1989 | 0 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 1 |
| 2003 | 2 | 2 |
| 2004 | 3 | 5 |
| 2005 | 0 | 5 |
| 2006 | 6 | 4 |
| 2007 | 1 | 0 |
| 2008 | 2 | 3 |
| 2009 | 3 | 5 |
| 2010 | 1 | 4 |
| 2011 | 3 | 0 |
| 2012 | 2 | 2 |
| 2013 | 3 | 3 |
| 2014 | 1 | 9 |
| 2015 | 5 | 4 |
| 2016 | 4 | 5 |
| 2017 | 2 | 2 |
| 2018 | 4 | 11 |
| 2019 | 7 | 4 |
| 2020 | 4 | 9 |
| 2021 | 8 | 2 |
| 2022 | 4 | 2 |
| 2023 | 4 | 4 |
| 2024 | 7 | 7 |
| 2025 | 6 | 0 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- In-situ serviceable gear pump11 Aug 2026US 12,704,125 B1Ace Machine Design Inc.
- Gear pump parallel load path24 Mar 2026US 12,584,482 B1Pratt & Whitney Canada Corp.
- Hydraulic gear pump with hydrostatic shaft bearing and isolated case drain and method of operating a hydraulic gear pump11 Nov 2025US 12,467,455 B2Parker-Hannifin Corporation
- Method for controlling a gear pump1 Jul 2025US 12,345,281 B2Dr. Ing. h,c.F. Porsche Aktiengesellschaft
- Internal gear machine with helical toothing27 May 2025US 12,313,068 B2Hydraulik Nord Technologies GmbH
- Gear pump parallel load path30 Jul 2026US 2026/0218702 A1Pratt & Whitney Canada Corp.
- Hig outer rotor shadow pockets21 May 2026US 2026/0139670 A1Hanon Systems EFP Canada Ltd.
- Rotor shaft hub and bearing for a high pressure fluid pump assembly28 Nov 2024US 2024/0392781 A1M&M Technologies, Inc.
- Internal gear machine31 Oct 2024US 2024/0360829 A1Hydraulik Nord Technologies GmbH
- Hydraulic Gear Pump with Hydrostatic Shaft Bearing and Isolated Case Drain and Method of Operating a Hydraulic Gear Pump19 Sep 2024US 2024/0309867 A1Parker-Hannifin Corporation
Most cited
By later US patents
- Gear pump28US 7,479,000 B2M&M Technologies, Inc. · 2009
- Magnetically driven pump20US 5,165,868 ATuthill Corporation · 1992
- Magnetically driven gear pump20US 7,137,793 B2Peopleflo Manufacturing, Inc. · 2006
- Assembly and method for pre-stressing a magnetic coupling canister18US 7,549,205 B2Peopleflo Manufacturing, Inc. · 2009
- High pressure hydraulic gear pump or motor15US 4,132,514 A1979