F04C 18/123
With radially or approximately radially from the rotor body extending tooth-like elements
Official title: {with radially or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor, e.g. one tooth}
F04C18/123 (With radially or approximately radially from the rotor body extending tooth-like elements) appears on 74 US grants and 86 published applications in this corpus.
Search patents in F04C- Granted patents
- 74
- Published applications
- 86
- Assignees
- 41
- Inventors
- 157
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 1 | 0 |
| 2004 | 2 | 2 |
| 2005 | 1 | 4 |
| 2006 | 1 | 3 |
| 2007 | 2 | 4 |
| 2008 | 0 | 4 |
| 2009 | 3 | 5 |
| 2010 | 2 | 4 |
| 2011 | 2 | 4 |
| 2012 | 2 | 6 |
| 2013 | 3 | 0 |
| 2014 | 3 | 2 |
| 2015 | 2 | 3 |
| 2016 | 0 | 7 |
| 2017 | 4 | 2 |
| 2018 | 4 | 2 |
| 2019 | 1 | 6 |
| 2020 | 5 | 3 |
| 2021 | 1 | 4 |
| 2022 | 4 | 6 |
| 2023 | 5 | 5 |
| 2024 | 6 | 2 |
| 2025 | 3 | 3 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Rotary piston compressor/pump/blower with a ventilation channel14 Jan 2025US 12,196,204 B2Gardner Denver Schopfheim GmbH
- Vacuum pump20 Aug 2026US 2026/0243257 A1Pfeiffer Vacuum GmbH
- Rotary piston compressor/pump/blower with a ventilation channel18 Jun 2026US 2026/0168495 A1
- Positive-displacement fluid machine with constrained gearset7 May 2026US 2026/0126043 A1Roper Pump Company
- Multi-stage hook and claw compressor assembly15 Jan 2026US 2026/0016011 A1
- Shell stator for a vacuum pump4 Dec 2025US 2025/0369356 A1Edwards Limited
Most cited
By later US patents
- Pulse-free blower51US 4,215,977 ACalspan Corporation · 1980
- Mechanical pumps17US 4,504,201 AThe BOC Group, Inc. · 1985
- System for pumping low thermal conductivity gases16US 6,644,931 B2Alcatel · 2003
- Twin-shaft, multiple-stage vacuum pump with the shafts vertically disposed13US 4,940,398 ALeybold Aktiengesellschaft · 1990
- Intake apparatus for engine of vehicle13US 7,011,079 B2Hyundai Motor Company · 2006