Muffler arrangements and methods
US6334506B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2000 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | Aug 10, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2490/20
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A muffler for use with heavy duty trucks includes an outer wall defining an internal volume; an inlet tube oriented at least partially within the internal volume; an outlet tube construction oriented at least partially within the internal volume and including a diverging section and a choke extension; and a first baffle structure securing the outlet tube construction within the internal volume. A ratio of the diverging section axial length to the choke extension axial length is preferably less than 3:1. The first baffle structure defines an aperture arrangement therein to permit gas flow communication therethrough. A ratio of the total open area of the aperture arrangement to the perimeter, cross-sectional area of the first baffle structure is between 1:50 and 1:500. The mufflers are particularly useful for attenuating low frequency noise associated with the internal volume of cabs or sleepers in heavy duty trucks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.