F01N 1/08
Silencing apparatus characterised by method of silencing: by reducing exhaust energy by
Official title: by reducing exhaust energy by throttling or whirling
F01N1/08 (Silencing apparatus characterised by method of silencing: by reducing exhaust energy by) appears on 1,346 US grants and 936 published applications in this corpus.
Search patents in F01N- Granted patents
- 1,346
- Published applications
- 936
- Assignees
- 532
- Inventors
- 2,450
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 10 | 0 |
| 1978 | 37 | 0 |
| 1979 | 15 | 0 |
| 1980 | 22 | 0 |
| 1981 | 19 | 0 |
| 1982 | 26 | 0 |
| 1983 | 15 | 0 |
| 1984 | 10 | 0 |
| 1985 | 8 | 0 |
| 1986 | 20 | 0 |
| 1987 | 15 | 0 |
| 1988 | 14 | 0 |
| 1989 | 18 | 0 |
| 1990 | 30 | 0 |
| 1991 | 21 | 0 |
| 1992 | 19 | 0 |
| 1993 | 25 | 0 |
| 1994 | 15 | 0 |
| 1995 | 21 | 0 |
| 1996 | 15 | 0 |
| 1997 | 25 | 0 |
| 1998 | 36 | 0 |
| 1999 | 28 | 0 |
| 2000 | 28 | 0 |
| 2001 | 27 | 9 |
| 2002 | 27 | 33 |
| 2003 | 31 | 33 |
| 2004 | 27 | 47 |
| 2005 | 32 | 51 |
| 2006 | 17 | 50 |
| 2007 | 22 | 36 |
| 2008 | 37 | 49 |
| 2009 | 22 | 37 |
| 2010 | 36 | 46 |
| 2011 | 48 | 33 |
| 2012 | 42 | 41 |
| 2013 | 37 | 36 |
| 2014 | 42 | 37 |
| 2015 | 41 | 43 |
| 2016 | 29 | 39 |
| 2017 | 44 | 41 |
| 2018 | 22 | 35 |
| 2019 | 35 | 53 |
| 2020 | 31 | 38 |
| 2021 | 32 | 32 |
| 2022 | 51 | 35 |
| 2023 | 48 | 26 |
| 2024 | 19 | 19 |
| 2025 | 25 | 22 |
| 2026 | 8 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F01N 1/089Using two or more expansion chambers in series350
- F01N 1/084The exhaust gases flowing through the silencer two or more times longitudinally338
- F01N 1/083Using transversal baffles defining a tortuous path for the exhaust gases or321
- F01N 1/10In combination with sound-absorbing materials241
- F01N 1/12Using spirally or helically shaped channels111
- F01N 1/086Having means to impart a whirling motion to the exhaust gases99
- F01N 1/082By passing the exhaust gases through porous members90
- F01N 1/085Throttling exhaust gas flow using a central core in a flow passage81
All 9 subgroupsShow fewer
Recent patents
- Decomposition chamber for aftertreatment system22 Sep 2026US 12,742,406 B2Cummins Emission Solutions Inc.
- Inlet silencer for a volumetric compressor and volumetric compressor equipped with it8 Sep 2026US 12,729,672 B2Atlas Copco Airpower, Naamloze Vennootschap
- Muffler for internal combustion engines25 Aug 2026US 12,716,373 B2Plaggio & C. S.P.A.
- Acoustic metamaterial-based muffler for exhaust noise reduction11 Aug 2026US 12,704,084 B2Ajou University Industry-Academic Cooperation Foundation
- Noise cancelling device21 Jul 2026US 12,688,841 B1King Fahd University of Petroleum and Minerals
- Containerized ultra-low nox diesel engine generator set with roof-mounted selective catalytic reduction system8 Oct 2026US 2026/0309075 A1Industrial Service Solutions WC, Inc.
- Exhaust pipe structure1 Oct 2026US 2026/0298118 A1Mazda Motor Corporation
- Decomposition chamber for aftertreatment system1 Oct 2026US 2026/0298121 A1Cummins Emission Solutions Inc.
- Inflatable Mat20 Aug 2026US 2026/0240347 A1Equip Outdoor Technologies Limited
- Decomposition chamber for aftertreatment system13 Aug 2026US 2026/0235063 A1Cummins Emission Solutions Inc.
Most cited
By later US patents
- Exhaust muffler174US 4,880,078 AHonda Giken Kogyo Kabushiki Kaisha · 1989
- Device for silencing firearms160US 4,576,083 A1986
- Combination spark arrestor and aspirating muffler129US 4,147,230 ANelson Industries, Inc. · 1979
- Vehicle exhaust system118US 7,766,123 B2Yamaha Hatsudoki Kabushiki Kaisha · 2010
- Blower pipe with silencer111US 5,841,080 AKioritz Corporation · 1998