F04C 15/0049
Equalization of pressure pulses
Official title: {Equalization of pressure pulses (silencing for compressors F04C29/06)}
F04C15/0049 (Equalization of pressure pulses) appears on 201 US grants and 156 published applications in this corpus.
Search patents in F04C- Granted patents
- 201
- Published applications
- 156
- Assignees
- 131
- Inventors
- 450
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 6 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 5 | 0 |
| 2000 | 13 | 0 |
| 2001 | 6 | 2 |
| 2002 | 4 | 3 |
| 2003 | 5 | 2 |
| 2004 | 4 | 7 |
| 2005 | 1 | 12 |
| 2006 | 3 | 3 |
| 2007 | 6 | 5 |
| 2008 | 5 | 2 |
| 2009 | 2 | 7 |
| 2010 | 3 | 7 |
| 2011 | 2 | 6 |
| 2012 | 7 | 9 |
| 2013 | 7 | 7 |
| 2014 | 5 | 3 |
| 2015 | 8 | 12 |
| 2016 | 6 | 8 |
| 2017 | 7 | 11 |
| 2018 | 11 | 8 |
| 2019 | 7 | 4 |
| 2020 | 3 | 7 |
| 2021 | 7 | 7 |
| 2022 | 3 | 4 |
| 2023 | 10 | 9 |
| 2024 | 7 | 7 |
| 2025 | 3 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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 controlling a gear pump1 Jul 2025US 12,345,281 B2Dr. Ing. h,c.F. Porsche Aktiengesellschaft
- Internal gear pump and internal gear motor25 Feb 2025US 12,234,823 B2Shimadzu Corporation
- Constant-flow pulseless rotary-vane-type displacement machine18 Feb 2025US 12,228,134 B2
- Rotating screw machine with discharge plate30 Apr 2026US 2026/0117769 A1City St George's, University of London
- Gear pump or gear motor26 Jun 2025US 2025/0207585 A1Daikin Industries, Ltd.
- Fluid pump for an aircraft turbomachine, lubrication circuit and aircraft turbomachine19 Jun 2025US 2025/0198309 A1Safran Aero Boosters SA
- Gerotor pump20 Feb 2025US 2025/0059971 A1Hanon Systems Efp Deutschland GmbH
- Automotive pendulum-slider pump26 Dec 2024US 2024/0426296 A1Pierburg Pump Technology GmbH
Most cited
By later US patents
- Positive displacement screw pump having pressure feedback control67US 5,348,453 AJames River Corporation of Virginia · 1994
- Rotary pump having a hydraulic intermediate capacity with first and second connections48US 6,817,847 B2LuK Fahrzeug-Hydraulik GmbH & Co.KG · 2004
- Variable displacement pump having throttled control passages37US 5,562,432 AJidosha Kiki Co., Ltd. · 1996
- Regulator valve for an ink marking system36US 4,971,527 AVideojet Systems International, Inc. · 1990
- Motor-driven hydraulic gear pump having a noise damper29US 6,004,119 AKoyo Seiko Co., Ltd. · 1999