F04C 2/18
With similar tooth forms
Official title: with similar tooth forms (F04C2/16 takes precedence)
F04C2/18 (With similar tooth forms) appears on 454 US grants and 547 published applications in this corpus.
Search patents in F04C- Granted patents
- 454
- Published applications
- 547
- Assignees
- 285
- Inventors
- 915
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 8 | 1 |
| 2002 | 3 | 9 |
| 2003 | 11 | 10 |
| 2004 | 9 | 13 |
| 2005 | 5 | 15 |
| 2006 | 12 | 11 |
| 2007 | 8 | 26 |
| 2008 | 2 | 18 |
| 2009 | 14 | 25 |
| 2010 | 8 | 36 |
| 2011 | 14 | 10 |
| 2012 | 19 | 22 |
| 2013 | 21 | 26 |
| 2014 | 18 | 27 |
| 2015 | 20 | 28 |
| 2016 | 18 | 29 |
| 2017 | 23 | 33 |
| 2018 | 29 | 46 |
| 2019 | 27 | 21 |
| 2020 | 33 | 36 |
| 2021 | 32 | 25 |
| 2022 | 18 | 16 |
| 2023 | 24 | 22 |
| 2024 | 16 | 18 |
| 2025 | 20 | 13 |
| 2026 | 7 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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.
- Gear pump parallel load path24 Mar 2026US 12,584,482 B1Pratt & Whitney Canada Corp.
- Molten eutectic salts thermal energy storage (MESTES) system10 Feb 2026US 12,544,685 B2
- External gear pump10 Feb 2026US 12,546,313 B2
- Rotary internal combustion engine with integrated pump8 Oct 2026US 2026/0309074 A1Pratt & Whitney Canada Corp.
- Gear pump parallel load path30 Jul 2026US 2026/0218702 A1Pratt & Whitney Canada Corp.
- Dynamic control of gears in a gear pump having a drive-drive configuration23 Jul 2026US 2026/0210355 A1Project Phoenix, LLC
- Internal gear pump25 Jun 2026US 2026/0177055 A1Sumitomo Electric Sintered Alloy, Ltd.
- Pump assembly25 Jun 2026US 2026/0177203 A1Pratt & Whitney Canada Corp.
Most cited
By later US patents
- Fluid pump/generator with integrated motor and related stator and rotor and method of pumping fluid97US 7,021,905 B2Advanced Energy Conversion, LLC · 2006
- Oil pump pressure control device85US 8,038,416 B2Yamada Manufacturing Co., Ltd. · 2011
- Method for making herringbone gears54US 5,865,239 AMicropump, Inc. · 1999
- Multiple-chamber gear pump with hydraulically connected chambers51US 5,466,131 AMicropump, Inc. · 1995
- Power washing apparatus49US 5,040,950 ANorthland Aluminum Products, Inc. · 1991