Silencer for exhausting gas streams
US4082160A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1976 |
| Grant date | Apr 4, 1978 |
| Priority date | — |
| Expiry date | Apr 8, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N1/10
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A silencer for reducing the noise of an exhausting gas stream, comprising a hollow body having a connector, a sound-absorbing insert in the body and an inner component, the sound-absorbing insert comprising at least one split sheet of closed-pore foamed plastic material having a thickness of less than its average pore-size. Advantageously the sheet material comprises closed-pore cross-linked foamed polyethylene stacked or wound to provide about 3 to 30 layers, each layer ranging in thickness from about 0.1 to 1.0 mm, having an average pore diameter from about 0.2 to 2 mm and an air permeability from about 0.5 to 200 Rayl, the air permeability of the innermost layer ranging from about 1 to 4 times the air permeability of the outermost layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.