F04C 15/0042
Systems for the equilibration of forces acting on the machines or pump
Official title: {Systems for the equilibration of forces acting on the machines or pump (interstice adjustment other than by fluid pressure F01C21/102)}
F04C15/0042 (Systems for the equilibration of forces acting on the machines or pump) appears on 404 US grants and 306 published applications in this corpus.
Search patents in F04C- Granted patents
- 404
- Published applications
- 306
- Assignees
- 240
- Inventors
- 867
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 7 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 7 | 0 |
| 1987 | 4 | 0 |
| 1988 | 9 | 0 |
| 1989 | 7 | 0 |
| 1990 | 4 | 0 |
| 1991 | 7 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 3 | 0 |
| 1995 | 7 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 17 | 0 |
| 2001 | 10 | 3 |
| 2002 | 7 | 9 |
| 2003 | 10 | 8 |
| 2004 | 11 | 12 |
| 2005 | 6 | 14 |
| 2006 | 4 | 9 |
| 2007 | 8 | 7 |
| 2008 | 8 | 3 |
| 2009 | 3 | 14 |
| 2010 | 3 | 10 |
| 2011 | 6 | 9 |
| 2012 | 10 | 12 |
| 2013 | 8 | 12 |
| 2014 | 8 | 10 |
| 2015 | 12 | 25 |
| 2016 | 16 | 15 |
| 2017 | 16 | 24 |
| 2018 | 20 | 18 |
| 2019 | 12 | 9 |
| 2020 | 19 | 16 |
| 2021 | 14 | 11 |
| 2022 | 11 | 11 |
| 2023 | 17 | 17 |
| 2024 | 16 | 15 |
| 2025 | 10 | 8 |
| 2026 | 4 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fluid pump for an aircraft turbomachine, lubrication circuit and aircraft turbomachine6 Oct 2026US 12,753,758 B2Safran Aero Boosters SA
- Pump and method to attenuate pulses at the discharge24 Mar 2026US 12,584,483 B2Magpumps Limited
- Method for ascertaining leaks of a displacement pump20 Jan 2026US 12,529,371 B2Brinkmann Pumpen K. H. Brinkmann GmbH & Co. KG
- Gear pump assembly6 Jan 2026US 12,516,668 B2ROLLS-ROYCE plc
- Axial load in helical trochoidal rotary machines18 Nov 2025US 12,473,912 B2Rotoliptic Technologies Incorporated
- Hig outer rotor shadow pockets21 May 2026US 2026/0139670 A1Hanon Systems EFP Canada Ltd.
- Rotating screw machine with discharge plate30 Apr 2026US 2026/0117769 A1City St George's, University of London
- Stator lining, stator and method for producing a stator lining30 Apr 2026US 2026/0121461 A1
- Vane for a vane cell machine, method for producing vanes, and vane cell machine5 Mar 2026US 2026/0063037 A1
- Vane pump with hydrostatic pressure plates12 Feb 2026US 2026/0043402 A1Eaton Intelligent Power Limited
Most cited
By later US patents
- Overheat protection for fluid pump89US 6,837,688 B2Standex International Corporation · 2005
- Positive displacement screw pump having pressure feedback control67US 5,348,453 AJames River Corporation of Virginia · 1994
- Power washing apparatus49US 5,040,950 ANorthland Aluminum Products, Inc. · 1991
- Rotary pump having a hydraulic intermediate capacity with first and second connections48US 6,817,847 B2LuK Fahrzeug-Hydraulik GmbH & Co.KG · 2004
- Frontal magnet coupling with integrated magnetic bearing load relief45US 4,767,378 ASiemens Aktiengesellschaft · 1988