F04C 29/065
Noise dampening volumes
Official title: {Noise dampening volumes, e.g. muffler chambers}
F04C29/065 (Noise dampening volumes) appears on 222 US grants and 221 published applications in this corpus.
Search patents in F04C- Granted patents
- 222
- Published applications
- 221
- Assignees
- 113
- Inventors
- 591
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 8 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 8 | 1 |
| 2002 | 6 | 5 |
| 2003 | 2 | 3 |
| 2004 | 3 | 7 |
| 2005 | 2 | 4 |
| 2006 | 0 | 5 |
| 2007 | 1 | 3 |
| 2008 | 3 | 4 |
| 2009 | 3 | 9 |
| 2010 | 4 | 7 |
| 2011 | 3 | 4 |
| 2012 | 3 | 12 |
| 2013 | 6 | 2 |
| 2014 | 3 | 8 |
| 2015 | 8 | 12 |
| 2016 | 6 | 13 |
| 2017 | 16 | 5 |
| 2018 | 10 | 16 |
| 2019 | 5 | 14 |
| 2020 | 11 | 16 |
| 2021 | 14 | 17 |
| 2022 | 21 | 13 |
| 2023 | 16 | 11 |
| 2024 | 18 | 11 |
| 2025 | 6 | 9 |
| 2026 | 4 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Inlet silencer for a volumetric compressor and volumetric compressor equipped with it8 Sep 2026US 12,729,672 B2Atlas Copco Airpower, Naamloze Vennootschap
- Compressor8 Sep 2026US 12,729,689 B2Hitachi-Johnson Controls Air Conditioning, Inc.
- Compressor with a muffler cover21 Apr 2026US 12,607,189 B2Daikin Industries, Ltd.
- Scroll compressor17 Feb 2026US 12,553,439 B2Mitsubishi Electric Corporation
- Quieted front exhaust motor16 Dec 2025US 12,496,699 B2Ingersoll-Rand Industrial U.S., Inc.
- Compressor-adapted enclosure and compressor unit6 Aug 2026US 2026/0226899 A1Mitsubishi Heavy Industries, Ltd.
- Pressure pulsation muffling device9 Jul 2026US 2026/0194052 A1Trane International Inc.
- Blower9 Jul 2026US 2026/0194058 A1Atlas Copco (Wuxi) Compressor Co., Ltd.
- Muffler and refrigerating system comprising muffler28 May 2026US 2026/0146611 A1
- Co-rotating scroll compressor21 May 2026US 2026/0139673 A1Kabushiki Kaisha Toyota Jidoshokki
Most cited
By later US patents
- 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
- Sound insulation in a refrigerant circuit66US 8,434,586 B2Volkswagen Aktiengesellschaft · 2013
- Sound-absorbent blower cover60US 4,258,821 A1981
- Shunt pulsation trap for positive-displacement machinery60US 9,732,754 B2Hi-Bar Blowers, Inc. · 2017