F04C 15/0007
Radial sealings for working fluid
Official title: {Radial sealings for working fluid}
F04C15/0007 (Radial sealings for working fluid) appears on 168 US grants and 185 published applications in this corpus.
Search patents in F04C- Granted patents
- 168
- Published applications
- 185
- Assignees
- 131
- Inventors
- 378
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 3 |
| 2004 | 3 | 3 |
| 2005 | 0 | 3 |
| 2006 | 2 | 4 |
| 2007 | 2 | 2 |
| 2008 | 1 | 8 |
| 2009 | 2 | 5 |
| 2010 | 6 | 9 |
| 2011 | 1 | 6 |
| 2012 | 5 | 6 |
| 2013 | 6 | 3 |
| 2014 | 6 | 18 |
| 2015 | 11 | 20 |
| 2016 | 8 | 14 |
| 2017 | 13 | 11 |
| 2018 | 9 | 16 |
| 2019 | 13 | 7 |
| 2020 | 7 | 9 |
| 2021 | 11 | 8 |
| 2022 | 6 | 8 |
| 2023 | 12 | 7 |
| 2024 | 9 | 7 |
| 2025 | 8 | 4 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- In-situ serviceable gear pump11 Aug 2026US 12,704,125 B1Ace Machine Design Inc.
- Rotary piston machine3 Feb 2026US 12,540,572 B2
- Flexible impeller pump30 Sep 2025US 12,429,050 B2Marine Flow Limited
- Pump with longitudinal flow channels12 Aug 2025US 12,385,482 B2PSG Germany GmbH
- Pumps, compressors, and expanders with a teardrop-shaped rotor8 Jul 2025US 12,352,268 B2Rotoliptic Technologies Incorporated
- Triple gear pump10 Sep 2026US 2026/0266286 A1IHI Corporation
- Method for controlling an eccentric screw pump23 Jul 2026US 2026/0210354 A1Seepex GmbH
- Hig outer rotor shadow pockets21 May 2026US 2026/0139670 A1Hanon Systems EFP Canada Ltd.
- Pumps13 Nov 2025US 2025/0347277 A1PSG Germany GmbH
- Rotary Machines With Teardrop-Shaped Rotors2 Oct 2025US 2025/0305496 A1Rotoliptic Technologies Incorporated
Most cited
By later US patents
- Pump with conveying chamber formed in outer rotor surface55US 7,674,100 B2PDD Innovations Ltd. · 2010
- Gear pump26US 4,065,235 ATuthill Pump Company · 1977
- Multi-chamber positive displacement fluid device21US 6,666,666 B12003
- Progressing cavity pump/motor20US 8,905,733 B2Robbins & Myers Energy Systems L.P. · 2014
- Compressor having first and second rotary member arrangement using a vane14US 8,894,388 B2LG Electronics Inc. · 2014