Apparatus for damping noise from exhaust air outlets
US4299305A · kind A · utility
Inventor
Key dates
| Filing date | Apr 24, 1979 |
| Grant date | Nov 10, 1981 |
| Priority date | — |
| Expiry date | Apr 24, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N1/24
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A sound absorber or silencor for sound from outlets of air or gas comprising a tube or flexible hose (2) which is connected to an outlet (1) of air or gas and which contains a sound absorbing body (3), whereby the tube or hose (2) and the sound absorbing body (3) can move more or less freely in relation to each other and/or in which the tube or hose (2) together with the sound absorbing body (3) is made easily flexible. Preferably both the outer hose (2) and the sound absorbing body are flexible and the sound absorbing body is movable inside the hose (2). The sound body (3) can be a strong, threads, fibres, loops etc. of plastic, metal, natural fibres or similar material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.