F04B 39/0027
Pulsation and noise damping means
Official title: {Pulsation and noise damping means}
F04B39/0027 (Pulsation and noise damping means) appears on 1,027 US grants and 1,030 published applications in this corpus.
Search patents in F04B- Granted patents
- 1,027
- Published applications
- 1,030
- Assignees
- 453
- Inventors
- 2,100
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 4 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 5 | 0 |
| 1983 | 7 | 0 |
| 1984 | 2 | 0 |
| 1985 | 8 | 0 |
| 1986 | 6 | 0 |
| 1987 | 3 | 0 |
| 1988 | 11 | 0 |
| 1989 | 3 | 0 |
| 1990 | 10 | 0 |
| 1991 | 9 | 0 |
| 1992 | 15 | 0 |
| 1993 | 17 | 0 |
| 1994 | 12 | 0 |
| 1995 | 7 | 0 |
| 1996 | 24 | 0 |
| 1997 | 14 | 0 |
| 1998 | 21 | 0 |
| 1999 | 28 | 0 |
| 2000 | 31 | 0 |
| 2001 | 26 | 6 |
| 2002 | 28 | 28 |
| 2003 | 33 | 25 |
| 2004 | 22 | 51 |
| 2005 | 14 | 45 |
| 2006 | 16 | 44 |
| 2007 | 15 | 25 |
| 2008 | 8 | 32 |
| 2009 | 12 | 35 |
| 2010 | 15 | 32 |
| 2011 | 25 | 33 |
| 2012 | 20 | 26 |
| 2013 | 20 | 37 |
| 2014 | 27 | 38 |
| 2015 | 28 | 59 |
| 2016 | 28 | 35 |
| 2017 | 39 | 53 |
| 2018 | 36 | 63 |
| 2019 | 41 | 60 |
| 2020 | 60 | 52 |
| 2021 | 44 | 60 |
| 2022 | 46 | 55 |
| 2023 | 48 | 48 |
| 2024 | 62 | 37 |
| 2025 | 39 | 28 |
| 2026 | 19 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F04B 39/0055With a special shape of fluid passage568
- F04B 39/0044With vibration damping supports206
- F04B 39/0033With encapsulations128
- F04B 39/005With direct action on the fluid flow using absorptive materials35
- F04B 39/0088Using mechanical tuned resonators22
- F04B 39/0083Using blow off silencers10
- F04B 39/0077By generating oil foam7
Recent patents
- Inflating module for use with an inflatable object6 Oct 2026US RE51,054 E1Team Worldwide Corporation
- Pressure relief system for a portable air pump and inflator system22 Sep 2026US 12,742,444 B2The Noco Company
- Inlet silencer for a volumetric compressor and volumetric compressor equipped with it8 Sep 2026US 12,729,672 B2Atlas Copco Airpower, Naamloze Vennootschap
- Cylinder assembly and compressor having the same25 Aug 2026US 12,716,408 B2Anhui Meizhi Compressor Co., Ltd.
- Air pulse generator11 Aug 2026US 12,702,616 B2Hill-Rom Services Pte. Ltd.
- Reciprocating compressor8 Oct 2026US 2026/0309141 A1LG Electronics Inc.
- Portable Air Pump and Inflator System with a Vibration Damping Base24 Sep 2026US 2026/0286946 A1The Noco Company
- Roots-type compressor system27 Aug 2026US 2026/0251145 A1
- Compressor-adapted enclosure and compressor unit6 Aug 2026US 2026/0226899 A1Mitsubishi Heavy Industries, Ltd.
- Radial piston compressor23 Jul 2026US 2026/0210344 A1thyssenkrupp AG
Most cited
By later US patents
- Piston mounting and balancing system115US 6,832,900 B2Thomas Industries, Inc. · 2004
- Torque control apparatus for enclosed compressors114US 4,604,036 AHitachi, Ltd. · 1986
- Air compressor apparatus including noise-reducing means82US 4,264,282 AK. C. Mosier Company · 1981
- Multi-stage low pressure drop muffler78US 8,016,071 B1Trane International Inc. · 2011
- Suction accumulator76US 6,220,050 B1Tecumseh Products Company · 2001