Exhaust emission control device
US7470312B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2004 |
| Grant date | Dec 30, 2008 |
| Priority date | — |
| Expiry date | Feb 17, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/30
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An arrangement is provided for an exhaust emission control device having a filter cartridge fitted through insertion into an inner shell of a muffler. The inner shell is formed to have an inner diameter greater than an outer diameter of a cartridge shell to provide an insertion clearance. The inner shell is formed with an inward, tapered portion gradually reduced in diameter toward a direction of insertion of the filter cartridge, with a portion of the inner shell inward of the tapered portion formed as a small-diameter portion having a reduced insertion clearance. Sealing and cushioning materials are fitted over the outer peripheral surface on an inward end of the cartridge shell and are adapted to be held in a clamped manner between the filter cartridge and the small-diameter portion of the inner shell upon fitting of the filter cartridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.