Hollow plastic product having a sound attenuator
US5723828A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 23, 1995 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Aug 23, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2023/004
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A hollow plastic product having a sound/noise attenuating function is provided. The product includes a duct (1) defining a flow passage and extending over a length along a longitudinal axis, a resonator (1b) having an internal chamber (1b') and a connector (1c) which establishes a fluidic communication between the flow passage of duct (1) and the internal chamber (1b') of resonator (1b). The resonator (1b) serves to absorb or attenuate sound/noise created by the fluid flowing through the flow passage. The product is manufactured from the same parison at the same time and thus has a unitary structure. An improved method for manufacturing such a hollow plastic product is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.