F04C 15/0019
Radial sealing elements specially adapted for intermeshing-engagement type machines or pumps
Official title: {Radial sealing elements specially adapted for intermeshing-engagement type machines or pumps, e.g. gear machines or pumps}
F04C15/0019 (Radial sealing elements specially adapted for intermeshing-engagement type machines or pumps) appears on 82 US grants and 80 published applications in this corpus.
Search patents in F04C- Granted patents
- 82
- Published applications
- 80
- Assignees
- 71
- Inventors
- 208
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 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 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 3 |
| 2004 | 3 | 3 |
| 2005 | 0 | 2 |
| 2006 | 2 | 1 |
| 2007 | 2 | 1 |
| 2008 | 0 | 4 |
| 2009 | 0 | 2 |
| 2010 | 3 | 4 |
| 2011 | 1 | 0 |
| 2012 | 2 | 2 |
| 2013 | 4 | 2 |
| 2014 | 1 | 9 |
| 2015 | 4 | 9 |
| 2016 | 5 | 2 |
| 2017 | 4 | 4 |
| 2018 | 2 | 7 |
| 2019 | 3 | 2 |
| 2020 | 4 | 4 |
| 2021 | 5 | 3 |
| 2022 | 4 | 2 |
| 2023 | 3 | 5 |
| 2024 | 5 | 4 |
| 2025 | 3 | 1 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- In-situ serviceable gear pump11 Aug 2026US 12,704,125 B1Ace Machine Design Inc.
- Pumps, compressors, and expanders with a teardrop-shaped rotor8 Jul 2025US 12,352,268 B2Rotoliptic Technologies Incorporated
- Internal gear machine with helical toothing27 May 2025US 12,313,068 B2Hydraulik Nord Technologies GmbH
- Gear pump with suction housing element providing a tight seal between suction and high-pressure chamber to increase pump efficiency and method of providing tight seal27 May 2025US 12,313,071 B1Hamilton Sundstrand Corporation
- Hypotrochoid positive-displacement machine17 Dec 2024US 12,168,980 B2Genesis Advanced Technology Inc.
- 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.
- Rotary Machines With Teardrop-Shaped Rotors2 Oct 2025US 2025/0305496 A1Rotoliptic Technologies Incorporated
- Internal gear machine31 Oct 2024US 2024/0360829 A1Hydraulik Nord Technologies GmbH
Most cited
By later US patents
- 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
- Motor-pump unit13US 10,060,432 B2Eckerle Industrie-Elektronik GmbH · 2018
- Grooved gear pump13US 4,493,625 AMicropump, Inc. · 1985