Muffler assembly
US4941545A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1989 |
| Grant date | Jul 17, 1990 |
| Priority date | — |
| Expiry date | Apr 28, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A muffler assembly includes a pair of outer shells mating to define a muffler chamber and a pair of internal tuning plates mating to define inlet and outlet tubes in the muffler chamber. Drop-in baffles are used to divide the muffler chamber into an expansion chamber, a pair of exhaust turnaround chambers, and a pair of resonance chambers. The two outer shells and first tuning plates are mechanically locked together at the perimeter of the muffler assembly and the second tuning plate is piggybacked onto the first tuning plate to reduce the number of material layers included in the mechanical lock. Each of the outer shells includes one or more ribs and channels for stiffening the outer shell to reduce vibration noise and to conduct condensate developing in the muffler chamber either to a hotter region where it will vaporize or to a drain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.