Central vacuum cleaner muffler
US6052863A · kind A · utility
12Cited by
10References
7Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 20, 1995 |
| Grant date | Apr 25, 2000 |
| Priority date | — |
| Expiry date | Oct 20, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L5/38
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A central vacuum cleaner having an air flow exhaust pipe is provided with a muffler comprising an elongated muffler pipe having a reduced diameter inlet and a reduced diameter outlet and a noise reducing foam liner disposed in the muffler pipe between the inlet and outlet. The foam liner includes a smooth inner surface that is generally flush with inner surfaces of the inlet and outlet. The foam liner comprises a combustion modified polyether polyurethane foam tube inserted in the muffler pipe between the inlet and outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.