Noise silencer for use in joint gap in highway
US4834213A · kind A · utility
7Cited by
4References
3Claims
0Family size
Inventors
Key dates
| Filing date | Sep 21, 1988 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | Sep 21, 2008 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01D19/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A noise silencer for highway is adapted to be stuffed in a joint gap formed in a highway. It has a rectangular casing and padding enclosed in the casing. The casing is provided with a vent hole adapted to be closed by a plug. Before mounting the noise silencer, air is firstly sucked out from the silencer through the vent hole to flatten the padding and the vent hole is plugged. After the silencer has been mounted, the vent hole is open to inflate the padding so that the silencer will be pressed against the opposite walls of the joint gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.