F04C 15/0003
Sealing arrangements in rotary-piston machines or pumps
Official title: {Sealing arrangements in rotary-piston machines or pumps (sealing in general F16J)}
F04C15/0003 (Sealing arrangements in rotary-piston machines or pumps) appears on 700 US grants and 666 published applications in this corpus.
Search patents in F04C- Granted patents
- 700
- Published applications
- 666
- Assignees
- 416
- Inventors
- 1,406
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 6 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 8 | 0 |
| 1982 | 8 | 0 |
| 1983 | 8 | 0 |
| 1984 | 9 | 0 |
| 1985 | 8 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 5 | 0 |
| 1993 | 12 | 0 |
| 1994 | 9 | 0 |
| 1995 | 6 | 0 |
| 1996 | 6 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 2 | 0 |
| 2000 | 17 | 0 |
| 2001 | 16 | 2 |
| 2002 | 5 | 5 |
| 2003 | 12 | 8 |
| 2004 | 10 | 16 |
| 2005 | 7 | 14 |
| 2006 | 10 | 14 |
| 2007 | 6 | 12 |
| 2008 | 9 | 21 |
| 2009 | 9 | 20 |
| 2010 | 14 | 23 |
| 2011 | 12 | 18 |
| 2012 | 11 | 31 |
| 2013 | 15 | 34 |
| 2014 | 22 | 50 |
| 2015 | 32 | 50 |
| 2016 | 29 | 37 |
| 2017 | 48 | 34 |
| 2018 | 23 | 51 |
| 2019 | 36 | 37 |
| 2020 | 30 | 39 |
| 2021 | 34 | 30 |
| 2022 | 34 | 32 |
| 2023 | 34 | 27 |
| 2024 | 39 | 31 |
| 2025 | 30 | 20 |
| 2026 | 10 | 10 |
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.
- Eccentric screw pump with magnetic coupling18 Aug 2026US 12,710,041 B2NETZSCH Pumpen & Systeme GmbH
- In-situ serviceable gear pump11 Aug 2026US 12,704,125 B1Ace Machine Design Inc.
- Seal assembly for progressive cavity pump14 Jul 2026US 12,680,544 B2National Oilwell Varco, L. P.
- Pump with pressure disc7 Jul 2026US 12,674,454 B2ITT Bornemann GmbH
- Multiphase pump of the screw spindle pump type1 Oct 2026US 2026/0298229 A1Leistritz Pumpen GmbH
- Triple gear pump10 Sep 2026US 2026/0266286 A1IHI Corporation
- Vane pump10 Sep 2026US 2026/0266287 A1KYB Corporation
- Scroll fluid machine with elastic member27 Aug 2026US 2026/0251140 A1Anest Iwata Corporation
- Method for controlling an eccentric screw pump23 Jul 2026US 2026/0210354 A1Seepex GmbH
Most cited
By later US patents
- Rod seal cartridge for progressing cavity artificial lift pumps106US 5,823,541 AKalsi Engineering, Inc. · 1998
- Tandem rotary pump with pressure chamber between two intermediate side plates55US 4,971,535 AToyoda Koki Kabushiki Kaisha · 1990
- Pump with conveying chamber formed in outer rotor surface55US 7,674,100 B2PDD Innovations Ltd. · 2010
- Cooling water pump device for outboard motor48US 6,984,158 B2Suzuki Motor Corporation · 2006
- Method of making an efficiency enhanced fluid pump or compressor47US 5,638,600 AFord Motor Company · 1997