Sound absorption device or muffler for blow nozzles
US5036948A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 5, 1990 |
| Grant date | Aug 6, 1991 |
| Priority date | — |
| Expiry date | Jan 5, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H5/228
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A sound absorption device for a blow nozzle formed with a bore extending from a low-pressure side of the nozzle, at which a gas flow enters the nozzle, to a high-pressure side of the nozzle, at which the gas flow streams from the nozzle through a nozzle opening formed at an end of the bore, includes a sound-absorbing insert for muffling noise which results from a variation in density of the gas flow as it streams through the nozzle opening and has frequencies ranging over substantially the entire audible frequency range, the sound-absorbing insert being shaped as a truncated cone and being rigidly set into the bore formed in the blow nozzle, with the smaller face of the truncated cone being disposed directly at the nozzle opening, the sound-absorbing insert being a rigid structure formed of sintered bronze spheres having a power grain-size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.