F04C 15/0038
Shaft sealings specially adapted for rotary-piston machines or pumps
Official title: {Shaft sealings specially adapted for rotary-piston machines or pumps}
F04C15/0038 (Shaft sealings specially adapted for rotary-piston machines or pumps) appears on 172 US grants and 158 published applications in this corpus.
Search patents in F04C- Granted patents
- 172
- Published applications
- 158
- Assignees
- 150
- Inventors
- 427
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 5 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 6 | 0 |
| 2001 | 7 | 0 |
| 2002 | 3 | 2 |
| 2003 | 5 | 0 |
| 2004 | 1 | 6 |
| 2005 | 3 | 2 |
| 2006 | 4 | 3 |
| 2007 | 0 | 4 |
| 2008 | 1 | 6 |
| 2009 | 3 | 8 |
| 2010 | 4 | 5 |
| 2011 | 5 | 3 |
| 2012 | 4 | 13 |
| 2013 | 2 | 11 |
| 2014 | 6 | 12 |
| 2015 | 12 | 9 |
| 2016 | 5 | 4 |
| 2017 | 13 | 7 |
| 2018 | 1 | 7 |
| 2019 | 8 | 12 |
| 2020 | 5 | 9 |
| 2021 | 6 | 4 |
| 2022 | 7 | 6 |
| 2023 | 7 | 6 |
| 2024 | 6 | 7 |
| 2025 | 8 | 10 |
| 2026 | 7 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- Vane pump10 Sep 2026US 2026/0266287 A1KYB Corporation
- Removable pump head with a polymeric shaft coupler19 Feb 2026US 2026/0049611 A1Procon US, Inc.
- Seal assembly for progressive cavity pump4 Dec 2025US 2025/0369442 A1National Oilwell Varco, L. P.
- Scroll compressor20 Nov 2025US 2025/0354550 A1Sanden Corporation
- Mechanical seal device18 Sep 2025US 2025/0290566 A1Pillar Corporation
Most cited
By later US patents
- Rod seal cartridge for progressing cavity artificial lift pumps106US 5,823,541 AKalsi Engineering, Inc. · 1998
- Cooling water pump device for outboard motor48US 6,984,158 B2Suzuki Motor Corporation · 2006
- Plastic extrusion apparatus and method41US 4,336,213 A1982
- Rotary machine shaft seal34US 5,199,718 AVickers, Incorporated · 1993
- Gear pump28US 6,158,997 AFluid Management, Inc. · 2000