F04C 2/082
Details specially related to intermeshing engagement type machines or pumps
Official title: {Details specially related to intermeshing engagement type machines or pumps}
F04C2/082 (Details specially related to intermeshing engagement type machines or pumps) appears on 827 US grants and 803 published applications in this corpus.
Search patents in F04C- Granted patents
- 827
- Published applications
- 803
- Assignees
- 471
- Inventors
- 1,650
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 8 | 0 |
| 1979 | 3 | 0 |
| 1980 | 8 | 0 |
| 1981 | 6 | 0 |
| 1982 | 9 | 0 |
| 1983 | 9 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 9 | 0 |
| 1989 | 2 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 11 | 0 |
| 1993 | 14 | 0 |
| 1994 | 12 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 15 | 0 |
| 1998 | 10 | 0 |
| 1999 | 10 | 0 |
| 2000 | 23 | 0 |
| 2001 | 20 | 3 |
| 2002 | 10 | 16 |
| 2003 | 24 | 15 |
| 2004 | 16 | 25 |
| 2005 | 9 | 33 |
| 2006 | 13 | 32 |
| 2007 | 11 | 34 |
| 2008 | 16 | 29 |
| 2009 | 30 | 23 |
| 2010 | 19 | 31 |
| 2011 | 18 | 16 |
| 2012 | 16 | 32 |
| 2013 | 19 | 27 |
| 2014 | 24 | 43 |
| 2015 | 32 | 51 |
| 2016 | 35 | 45 |
| 2017 | 41 | 46 |
| 2018 | 32 | 50 |
| 2019 | 37 | 36 |
| 2020 | 34 | 42 |
| 2021 | 41 | 30 |
| 2022 | 34 | 29 |
| 2023 | 24 | 24 |
| 2024 | 35 | 37 |
| 2025 | 28 | 36 |
| 2026 | 16 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Process pump with dynamic seal for dry run capability6 Oct 2026US 12,753,757 B2Viking Pump, Inc.
- Fluid pump for an aircraft turbomachine, lubrication circuit and aircraft turbomachine6 Oct 2026US 12,753,758 B2Safran Aero Boosters SA
- Diagnostic checks of a gear pump in a fluid system25 Aug 2026US 12,716,414 B2Project Phoenix, LLC
- In-situ serviceable gear pump11 Aug 2026US 12,704,125 B1Ace Machine Design Inc.
- Gas turbine engine having a hydraulic fan brake4 Aug 2026US 12,698,724 B2General Electric Company
- Rotary internal combustion engine with integrated pump8 Oct 2026US 2026/0309074 A1Pratt & Whitney Canada Corp.
- Improved Positive-Displacement Rotary Hydraulic Machine8 Oct 2026US 2026/0309149 A1Stem Numerical Engineering S.R.L.
- Motor and pump comprising same1 Oct 2026US 2026/0298226 A1LG Innotek Co., Ltd.
- Positive displacement machine with speed sensor24 Sep 2026US 2026/0286957 A1
- Signal control method, signal control apparatus, signal control device, storage medium, and computer program product24 Sep 2026US 2026/0286958 A1Risun Technology (Shenzhen) Limited
Most cited
By later US patents
- Dispensing Apparatus74US 5,697,527 AFluid Management, Inc. · 1997
- Positive displacement screw pump having pressure feedback control67US 5,348,453 AJames River Corporation of Virginia · 1994
- Hydraulic machine having teeth formed by rollers54US 5,595,479 ADanfoss A/S · 1997
- Method for making herringbone gears54US 5,865,239 AMicropump, Inc. · 1999
- Method of making an efficiency enhanced fluid pump or compressor47US 5,638,600 AFord Motor Company · 1997