US Patent No: 7,870,930
Number of patents in Portfolio can not be more than 2000
Exhaust system with external helmholtz resonator and associated method
Stats
-
Jan 18, 2011
Issued date -
Sep 2, 2005
filing date -
11/219,150
serial no -
In Force
status
Importance
Loading Importance Indicators...
Abstract
An exhaust system comprises a muffler and a Helmholtz resonator. The muffler comprises an exhaust inlet aperture for receiving exhaust gas into the muffler, an exhaust outlet aperture for discharging exhaust gas from the muffler, and a resonator aperture. The Helmholtz resonator is at least partially external to the muffler and in acoustic communication with the resonator aperture. An associated method is disclosed.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 6,732,510 Exhaust processor with variable tuning system | 16 | 2002 | |
| 6,702,190 Heat transfer system for a vehicle | 7 | 2002 | |
| 2004/0238,272 Muffler with helmholtz resonator having multiple degrees of freedom | 3 | 2003 | |
|
|
|||
| 5,246,356 Sound abatement in rotary compressors | 6 | 1992 | |
| 6,799,657 Absorptive/reactive muffler for variable speed compressors | 10 | 2002 | |
|
|
|||
| 6,082,487 Mufflers for use with engine retarders; and methods | 14 | 1999 | |
| 6,354,398 Mufflers for use with engine retarders; and methods | 9 | 2000 | |
|
|
|||
| 5,493,080 External arrangement for damping sounds in a pipe system | 16 | 1994 | |
|
|
|||
| 5,602,368 Muffler for an internal combustion engine | 11 | 1994 | |
|
|
|||
| 4,381,832 Exhaust silencer having an incorporated resonator for an internal combustion engine | 6 | 1981 | |
|
|
|||
| 5,839,405 Single/multi-chamber perforated tube resonator for engine induction system | 16 | 1997 | |
|
|
|||
| 6,349,541 Exhaust silencer for an internal combustion engine and the method of operation | 42 | 1999 | |
|
|
|||
| 5,723,828 Hollow plastic product having a sound attenuator | 15 | 1995 | |
|
|
|||
| 7,240,769 Exhaust volume | 5 | 2005 | |
|
|
|||
| 7,246,680 Sound dampening assembly for automotive exhaust system | 4 | 2004 | |
|
|
|||
| 5,821,474 Muffler with variable damping characteristics | 16 | 1996 | |
|
|
|||
| 5,726,397 Vehicle exhaust device | 19 | 1995 | |
|
|
|||
| 2004/0069,563 Silencer with a plurality of resonance chambers | 2 | 2003 | |
|
|
|||
| 6,158,214 Exhaust silencer arrangement | 14 | 1999 | |
|
|
|||
| 4,501,341 Low frequency muffler | 33 | 1982 | |
|
|
|||
| 6,755,279 Controllable muffler system for internal combustion engine | 9 | 2001 | |
|
|
|||
| 4,416,350 Muffler | 26 | 1982 | |
|
|
|||
| 4,693,339 Muffler for gas inducting machinery generating low frequency noise | 19 | 1986 | |
|
|
|||
| 6,558,137 Reciprocating piston compressor having improved noise attenuation | 16 | 2001 | |
|
|
|||
| 4,846,302 Acoustic muffler | 28 | 1986 | |
|
|
|||
| 5,349,141 Resonator type silencer having plural resonance chambers | 20 | 1993 | |
|
|
|||
| 6,732,509 Engine acoustical system | 12 | 2002 | |
|
|
|||
| 4,786,299 Vacuum loader with silencer base | 23 | 1987 | |
| 6,889,499 Internal combustion engine exhaust system | 7 | 2002 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Jul 18, 2014 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jul 18, 2018 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jul 18, 2022 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |