Acoustic filter
US4768616A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1987 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | May 27, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2201/43
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An acoustic filter adapted to be fitted on a pipe for the purpose of absorbing pressure waves. The acoustic filter has a body constituted by a cylinder, an inlet and outlet end, a locking ring fitted in a groove located at the inlet and outlet ends, coupling means within the locking rings for coupling the filter to a pipe. A holder tube fitted with diffuser rings for connecting the coupling means. A deformable bag made from a flexible material is mounted between the inlet and outlet ends, shaped like a cylindrical sleeve and surrounds the holder tube and diffuser rings. The bag defines with an inner wall of the cylinder a chamber for receiving a pressurized gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.